Ln-containing polyoxoniobates(PONbs)have appealing applications in luminescence,information encryption and magnetic fields,but the synthesis of PONbs containing high-nuclearity Ln-O clusters is challenging due to the ...Ln-containing polyoxoniobates(PONbs)have appealing applications in luminescence,information encryption and magnetic fields,but the synthesis of PONbs containing high-nuclearity Ln-O clusters is challenging due to the easy hydrolysis of Ln^(3+)ions in alkaline environments.In this paper,we are able to integrate CO_(3)^(2-)and high-nuclearity Ln-O clusters into PONb to construct an inorganic giant Eu_(19)-embedded PONb H_(49)K_(16)Na_(13)(H_(2)O)_(63)[Eu_(21)O_(2)(OH)_(7)(H_(2)O)_(5)(Nb_(7)O_(22))_(10)(Nb_(2)O_(6))_(2)(CO_(3))_(18)]·91H_(2)O(1),which contains the highest nuclearity Eu-O clusters and the largest number of Eu^(3+)ions among PONbs.In addition,the film that was prepared by mixing 1 with gelatin and glycerol,exhibits reversible luminescence switching behavior under acid/alkali stimulation and has been used to create a fluorescence-encoded information approach.This work paves a feasible strategy for the construction of high-nuclearity Ln-O cluster-containing PONbs and the expansion of the application of Ln-containing PONbs in information encryption.展开更多
With the rapid development of holographic technology,metasurface-based holographic communication schemes have demonstrated immense potential for electromagnetic(EM)multifunctionality.However,traditional passive metasu...With the rapid development of holographic technology,metasurface-based holographic communication schemes have demonstrated immense potential for electromagnetic(EM)multifunctionality.However,traditional passive metasurfaces are severely limited by their lack of reconfigurability,hindering the realization of versatile holographic applications.Origami,an art form that mechanically induces spatial deformations,serves as a platform for multifunctional devices and has garnered significant attention in optics,physics,and materials science.The Miura-ori folding paradigm,characterized by its continuous reconfigurability in folded states,remains unexplored in the context of holographic imaging.Herein,we integrate the principles of Rosenfeld with L-and D-metal chiral enantiomers on a Miura-ori surface to tailor the aperture distribution.Leveraging the continuously tunable nature of the Miura-ori's folded states,the chiral response of the metallic structures varies across different folding configurations,enabling distinct EM holographic imaging functionalities.In the planar state,holographic encryption is achieved.Under specific folding conditions and driven by spin circularly polarized(CP)waves at a particular frequency,multiplexed holographic images can be reconstructed on designated focal planes with CP selectivity.Notably,the fabricated origami metasurface exhibits a large negative Poisson ratio,facilitating portability and deployment and offering novel avenues for spin-selective systems,camouflage,and information encryption.展开更多
Photoswitchable fluorescent polymeric nanoparticles were widely concerned because of their excellent features including the flexible design,easy preparation and functionalization,and thus exhibited great application p...Photoswitchable fluorescent polymeric nanoparticles were widely concerned because of their excellent features including the flexible design,easy preparation and functionalization,and thus exhibited great application potential in information encryption,anti-counterfeiting,but remained challenging in improving the security.Herein,we described a self-erased time-resolved information encryption via using photoswitchable dual-color fluorescent polymeric nanoparticles(PDFPNs)containing two fluorescence dyes(blue and red)and photochromic spiroxazine derivatives.In view of the different thermo-induced isomerization rates of photochromic spiroxazine derivatives in different flexible substrates,the decoloration rate of PDFPNs can be programmatically tuned by regulating ratio between rigid polymer and flexible polymer.Therefore,after ultraviolet light(UV)irradiation,correct information could only be recognized in preestablished time during the self-erased process.Our results indicated that PDFPNs exhibited fast photo-responsibility(2 min),high fluorescence contrast,well-pleasing photo-reversibility(>20 times),and programmable thermo-responsiveness(24 s-6 h).We thus demonstrated their application in the selferased time-resolved information encryption and anti-counterfeiting with high security.展开更多
Dynamic assembly on time scale is common in biological systems but rare for artificial materials,especially for smart luminescent materials.Programming molecular assembly in a spatio-temporal manner and resulting in w...Dynamic assembly on time scale is common in biological systems but rare for artificial materials,especially for smart luminescent materials.Programming molecular assembly in a spatio-temporal manner and resulting in white-light-including multicolor fluorescence with time-dynamic features remains challenging.Herein,controlling molecular assembly on time scale is achieved by integrating a pH-responsive motif to a transient alkaline solution which is fabricated by activators(NaOH)and deactivators(esters),leading to automatic assembly on time scale and time-dependent multicolor fluorescence changing from blue to white and yellow.The kinetics of the assembly process is dependent on the ester hydrolysis process,which can be controlled by varying ester concentrations,temperature,initial pH,stirring rate and ester structures.This dynamic fluorescent system can be further developed for intelligent fluorescent materials such as fluorescent ink,three-dimension(3D)codes and even four-dimension(4D)codes,exhibiting a promising potential for information encryption.展开更多
Crystal polymers or liquid crystal elastomers undergo a phase transition that results in a change in the corresponding optical properties,which has the potential to be applied in areas such as information encryption a...Crystal polymers or liquid crystal elastomers undergo a phase transition that results in a change in the corresponding optical properties,which has the potential to be applied in areas such as information encryption and anti-counterfeiting.The utilization of these materials for patterning purposes requires different phase transition temperatures.However,once prepared,altering the phase transition temperature of them presents significant challenges.Herein,a poly(oxime-ester)(POE)network is developed to achieve high-resolution and multilevel patterning by photo-induced isomerization.The as-prepared POE exhibits the ability to transition from an opaque state to a transparent state under temperature stimuli,with the transition temperature and kinetics dependent on UV light exposure time.Thus,complex patterns and information can be encrypted through different selective regional exposure time and decrypted under specific temperature or cooling time.Furthermore,we illustrate an example of temporal communication,where cooling time or temperature serves as the encoded information.This research expands the application scope of advanced encryption materials,showcasing the potential of POE in dynamic information encryption and decryption processes.展开更多
A novel self-recoverable mechanoluminescent phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) was developed by the high-tem-perature solid-state reaction method,and its luminescence properties were investigated.Ca_(5)Ga_(6)O_(14)...A novel self-recoverable mechanoluminescent phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) was developed by the high-tem-perature solid-state reaction method,and its luminescence properties were investigated.Ca_(5)Ga_(6)O_(14)∶Eu^(3+)can produce red mechanoluminescence,and importantly,it shows good repeatability.The mechanoluminescence of Ca_(5)Ga_(6)O_(14)∶Eu^(3+) results from the piezoelectric field generated inside the material under stress,rather than the charge carriers stored in the traps,which can be confirmed by the multiple cycles of mechanoluminescence tests and heat treatment tests.The mechanoluminescence color can be turned from red to green by co-doping varied concentrations of Tb^(3+),which may be meaningful for encrypted letter writing.The encryption scheme for secure communication was devised by harnessing mechanoluminescence patterns in diverse shapes and ASCII codes,which shows good encryption performance.The results suggest that the mechanoluminescence phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+),Tb^(3+)may be applied to the optical information encryption.展开更多
Mimicking tactile perception is critical to the development of advanced interactive neuromorphic platforms.Inspired by cutaneous perceptual functions,a bionic tactile perceptual platform is proposed.PDMS-based tactile...Mimicking tactile perception is critical to the development of advanced interactive neuromorphic platforms.Inspired by cutaneous perceptual functions,a bionic tactile perceptual platform is proposed.PDMS-based tactile sensors act as bionic skin touch receptors.Flexible indium tin oxide neuromorphic transistors fabricated with a single-step mask pro-cessing act as artificial synapses.Thus,the tactile perceptual platform possesses the ability of information processing.Interestingly,the flexible tactile perception platform can find applications in information encryption and decryption.With adoption of cipher,signal transmitted by the perception platform is encrypted.Thus,the security of information transmis-sion is effectively improved.The flexible tactile perceptual platform would have potentials in cognitive wearable devices,advanced human-machine interaction system,and intelligent bionic robots.展开更多
Self-healing polyurethane-elastomers are highly desired in various fields.However,there is often a trade-off between mechanical properties and dynamic self-healing due to the mutually exclusive mechanism.Herein,we dev...Self-healing polyurethane-elastomers are highly desired in various fields.However,there is often a trade-off between mechanical properties and dynamic self-healing due to the mutually exclusive mechanism.Herein,we develop a self-healable and mechanically robust poly(oxime-urethane)elastomer(Zn-DAPU)to circumvent this inherent trade-off by incorporating zincpyridinyl cross-links into the hydrogen bonding and dynamic oxime-urethane supramolecular-covalent hybrid network.Benefiting from the synergistic strengthening of H-bonding and coordinate interactions,Zn-DAPU network performs tunable toughness with metal ion concentration change,which improves 345.2%and reaches 82.2 MJ m^(-3),with robust tensile strength of 22.8 MPa,Young's modulus of 37.1 MPa,and satisfactory elongation of 815.7%.The healing efficiency can be reached at 91.7%with a restored toughness of 75.4 MJ m^(-3)at 80℃for 10 h.Furthermore,zinc-contained networks exhibit photolysis behavior due to the homolytic cleavage of N-O bonds in oxime-urethane moieties,which can be functionalized further with fluorescamine as the specific information encryption coating with quick response codes(QRs)upon polyester fabric.This work provides valuable guidance towards the development of high-performance self-healing polyurethane and wearable functional materials.展开更多
Dissipative self-assembly,which exploits energy inputs of chemical fuels to maintain the functional states far from equilibrium,is essential to living systems.Among a variety of fuels,carbon dioxide(CO_(2))gas has yet...Dissipative self-assembly,which exploits energy inputs of chemical fuels to maintain the functional states far from equilibrium,is essential to living systems.Among a variety of fuels,carbon dioxide(CO_(2))gas has yet to be introduced in artificial dissipative materials.Here we describe a CO_(2)-fueled non-equilibrium co-assembly system that couples with a C1 catalytic pathway to dissipate the fuel for function output.Using common frustrated Lewis pair(FLP)as precursors,CO_(2)can dynamically bridge between them to constitute metastable amphiphiles,which not only highly activate CO_(2)but also enable their co-assembly with substrates into a transient fibrillar gel.In turn,the backward pathway is realized by cooperative C1 catalysis of the substrate and activated CO_(2)species in the assembled state.This can boost the depletion of gas fuel and facilitate disassembly to the sol.Moreover,tailoring the intrinsic substrate/FLP chemistries,as well as external cues,to shift the catalytic activity is accessible to regulate the period and lifetime of sol-gel-sol transition over a wide range.Based on the tunability in phase transition on a time scale,we develop time-gated information encryption materials using the transient FLP array loaded gas-encoded substrates,and the correct information can be read only at a specified time window.This study provides inspiration for a new paradigm of fuel for dissipative systems and their intelligent materials applications.展开更多
Dynamic fluorescent materials capable of stimulus-responsive emission modulation have emerged as pivotal components in next-generation information security systems.This study presents a novel photoresponsive fluoresce...Dynamic fluorescent materials capable of stimulus-responsive emission modulation have emerged as pivotal components in next-generation information security systems.This study presents a novel photoresponsive fluorescent composite system in which spiropyran(SP)was covalently grafted onto naphthalimide-functionalized silica aerogel matrices.These architectures exhibit reversible fluorescence resonance energy transfer between the naphthalimide donors and merocyanine-form of SP acceptors under ultraviolet irradiation,enabling dynamic emission shifting from green(blue)to red.The aggregation-induced emission characteristics of SP were used to engineer a smart material system that can reversibly regulate its distinct red fluorescence by precisely controlling the dispersion of amino groups on naphthalimide-functionalized silica aerogels.This spatial manipulation directly governs the molecular packing state of SP,enabling dynamic fluorescence modulation.A programmable control over the fluorescence chromatic transitions in the composite material was achieved by systematically adjusting the SP grafting densities(1%,2%,and 3%w/w).A unique mode of dynamic information encryption technology was developed by utilizing dynamic fluorescence variations.These materials can substantially enhance information encryption levels due to their precisely adjustable fluorescence properties in response to external stimuli over time.This makes the encryption process even more unpredictable and complex,thereby exponentially increasing the difficulty for unauthorized parties to replicate or decode the encrypted information.展开更多
Stimuli responsive phosphors with photoluminescence and thermoresponsive luminescence are intriguing for information encryption applications.Herein,two solvent-mediated,stimuli responsive phosphors based on phosphine-...Stimuli responsive phosphors with photoluminescence and thermoresponsive luminescence are intriguing for information encryption applications.Herein,two solvent-mediated,stimuli responsive phosphors based on phosphine-copper(I)iodide complexes 1 and 2 are reported.Complex 1 exhibited temperature-and excitation-wavelength-dependent dual-emission characteristics,displaying high energy(HE)and low energy(LE)bands with the quantum yield(QY)of 38.5%under 365 nm irradiation;but complex 2 exhibited no emission.The LE emission can be attributed to a triplet halide-to-metal charge transfer(^(3)XMCT)and copper-centered 4d→3s,3p transitions,whereas the HE emission originates from a triplet halide-to-ligand charge-transfer(^(3)XLCT).Importantly,in complex 2,the strong C—H∙∙∙Cl interaction in the supramolecular crystal lattice annihilated the sensitive cluster centered(3CC)excited state.Intriguingly,only the HE emission band of complex 2 can be successfully activated by high-energy excitation or changing the temperature.Nevertheless,the QY of complex 2 is 15.6%under 310 nm irradiation,which is smaller than that of complex 1 of 49.8%.This behavior was further confirmed by heating,where both complexes show HE emission.The reversible crystal transformation between complexes 1 and 2 was achieved.Furthermore,the reversible excitation-wavelength-dependent dual-emission and thermoresponsive properties make these phosphors suitable candidates for anti-counterfeiting and information encryption applications.展开更多
Carbon dots(CDs)with aggregation-induced emission(AIE)have sparked significant interest in multidimensional anti-counterfeiting due to their exceptional fluorescence properties.However,the preparation of AIE CDs with ...Carbon dots(CDs)with aggregation-induced emission(AIE)have sparked significant interest in multidimensional anti-counterfeiting due to their exceptional fluorescence properties.However,the preparation of AIE CDs with multicolor solid-state fluorescence remains a formidable challenge due to its complicated construction.In the present work,a novel class of multicolor AIE CDs(M-CDs)were fabricated using selected precursor(salicylic acid,thiosalicylic acid,and 2,2'-dithiodibenzoic acid),with an eco-friendly,low-cost one-pot solvothermal method.In the dilute organic solution,M-CDs manifested blue emission,but upon aggregation in the presence of water,the red,yellow,green,and blue emissions were displayed due to the AIE effect.Structural analysis,coupled with theoretical calculations,revealed that the increase in the size of sp2 domains would lower the Eg and cause a red-shift emission wavelength.Significantly,the continuous emission of M-CDs from blue to red can be utilized as ink for multimode printing,enabling the creation of a variety of school badges and quick response codes.These findings hold promising implications for multi-information encryption applications.展开更多
Surfaces with micro-nanoscale structures show different optical responses,including infrared reflection,thermal radiation,and protective coloration.Direct realization of structure camouflage is important for material ...Surfaces with micro-nanoscale structures show different optical responses,including infrared reflection,thermal radiation,and protective coloration.Direct realization of structure camouflage is important for material functionalities.However,external cloaks or coatings are necessary in structure camouflage,which limits the surface functionality.Here,we propose a novel strategy for the direct structure camouflage through topography inherited removal(TIR)with ultrafast laser,featuring pristine topography preservation and scattering surface fabrication.After multistep TIR,pristine topographies are partially and uniformly removed to preserve the original designed structures.Optical response changes show the suppression of specular reflection by uniformizing reflected light intensity to a low level on the inherited surface.We produce various structure camouflages on large scaled substrates,and demonstrate applications of information encryption in code extraction and word recognition through structure camouflage.The proposed strategy opens opportunities for infrared camouflage and other technologies,such as thermal management,device security,and information encryption.展开更多
Metal-free materials with multicolor tunable circularly polarized luminescence(CPL)are attractive because of their potential applications in information storage and encryption.Here,we designed two enantiomers composed...Metal-free materials with multicolor tunable circularly polarized luminescence(CPL)are attractive because of their potential applications in information storage and encryption.Here,we designed two enantiomers composed of chiral dialkyl glutamides and achiral vibration-induced emission(VIE)moiety,which can switch on CPL after a simple gelation process.It is noteworthy that the CPL colors vary in different solvents,and this is attributed to various self-assembly-induced microstructures,in which the VIE moiety is restrained to different degrees.Accordingly,a multidimensional code system composed of a quick response code,a ultraviolet(UV)light-activated color code,and a CPL information figure was constructed.To our satisfaction,the system possesses multiple information-storage functions.The orthogonal anticounterfeiting and CPLenhanced encryption functions also improve the system information encryption ability.In brief,this study provides a practical example of CPL applied to information security and an effective approach to obtain a single-component color-tunable CPL material with multiple information storage and encryption functions as well.展开更多
Controlling the growth of bacterial biofilms in a specific pattern greatly enhances the study of cell-to-cell interactions and paves the way for expanding their biolog-ical applications.However,the development of simp...Controlling the growth of bacterial biofilms in a specific pattern greatly enhances the study of cell-to-cell interactions and paves the way for expanding their biolog-ical applications.However,the development of simple,cost-effective,and highly resolved biopatterning approaches remains a persistent challenge.Herein,a pio-neering photodynamic biopatterning technique for the creation of living bacterial biofilms with customized geometries at high resolutions is presented.First of all,an outstanding aggregation-induced emission photosensitizer is synthesized to enable efficient photodynamic bacterial killing at a low concentration.By combining with custom-designed photomasks featuring both opaque and transparent patterns,the viability of photosensitizer-coated bacteria is successfully manipulated by control-ling the degree of light transmittance.This process leads to the formation of living bacterial biofilms with specific patterns replicated from the photomask.Such an innovative strategy can be employed to generate living bacterial biofilms composed of either mono-or multispecies,with a spatial resolution of approximately 24µm.Furthermore,its potential applications in information storage/encryption and antibi-otic screening are explored.This study provides an alternative way to understand and investigate the intricate interactions among bacteria within 3D biofilms,hold-ing great promise in the controlled fabrication of dynamic biological systems for advanced applications.展开更多
Programming microscopic assembly mode to control macroscopic property is an attractive research objective.In particular,controlling molecular assembly to control fluorescence is of considerable interest for developing...Programming microscopic assembly mode to control macroscopic property is an attractive research objective.In particular,controlling molecular assembly to control fluorescence is of considerable interest for developing smart fluorescent materials.Herein,a color-tunable supramolecular emissive system was developed based on cucurbit[8]uril mediated host-vip assembly.Chemical designing for the molecular structures with minimized change resulted in different assembly modes and hence generating distinctive fluorescence,including green,yellow and orange with the addition of cucurbit[n]uril.Taking advantage of this feature,the advanced information encryption material(4D code)with multiple encryption levels and time-dependent encryption feature was developed.Such a code was dynamic on time scale,generating a series of 3D codes with time.The encrypted information only can be recognized by integrating time-coursed codes.This work provides a new insight for designing intelligent fluorescent materials for information encryption with high level of security.展开更多
Constructingeco-friendlystimuli-responsivephosphorescence materials remains challenging and fascinating.Herein,we use natural cellulose as the rawmaterial to prepare pH-responsive room-temperature phosphorescent(RTP)m...Constructingeco-friendlystimuli-responsivephosphorescence materials remains challenging and fascinating.Herein,we use natural cellulose as the rawmaterial to prepare pH-responsive room-temperature phosphorescent(RTP)materials with excellent biodegradability by introducing anionic structures.The introduction of a phenylcarboxylate substituent not only promotes intersystem crossing but also brings about electrostatic-attractive and strong hydrogenbonding interactions,which enhance the intermolecular chain interactions.Therefore,the obtained anionic cellulose derivatives containing phenylcarboxylate groups exhibit ultra-long RTP.More intriguingly,these cellulose-based phosphorescent materials have a distinctive pH-responsive behavior.Under acidic conditions,the carboxylate is converted into the carboxylic acid,resulting in phosphorescence quenching.This process is reversible.Moreover,the obtained cellulosebased phosphorescent materials have excellent processability and can be easily processed into various material forms,such as film,coating,and pattern,by using eco-friendly aqueous solution processing strategies.Such proof-of-concept biomass-based phosphorescent materials with unique pH-responsive behavior and excellent processability have a huge potential in information encryption,advanced anti-counterfeiting,and food monitoring.展开更多
Carbon dots(CDs)-based composites have shown impressive performance in fields of information encryption and sensing,however,a great challenge is to simultaneously implement multi-mode luminescence and room-temperature...Carbon dots(CDs)-based composites have shown impressive performance in fields of information encryption and sensing,however,a great challenge is to simultaneously implement multi-mode luminescence and room-temperature phosphorescence(RTP)detection in single system due to the formidable synthesis.Herein,a multifunctional composite of Eu&CDs@p RHO has been designed by co-assembly strategy and prepared via a facile calcination and impregnation treatment.Eu&CDs@p RHO exhibits intense fluorescence(FL)and RTP coming from two individual luminous centers,Eu3+in the free pores and CDs in the interrupted structure of RHO zeolite.Unique four-mode color outputs including pink(Eu^(3+),ex.254 nm),light violet(CDs,ex.365 nm),blue(CDs,254 nm off),and green(CDs,365 nm off)could be realized,on the basis of it,a preliminary application of advanced information encoding has been demonstrated.Given the free pores of matrix and stable RTP in water of confined CDs,a visual RTP detection of Fe^(3+)ions is achieved with the detection limit as low as 9.8μmol/L.This work has opened up a new perspective for the strategic amalgamation of luminous vips with porous zeolite to construct the advanced functional materials.展开更多
Perovskites showcased potential promise for innovative circularly polarized luminescence (CPL)-active multi-channelinformation encryption, owing to the exceptional luminescence brightness. It was still a formidablecha...Perovskites showcased potential promise for innovative circularly polarized luminescence (CPL)-active multi-channelinformation encryption, owing to the exceptional luminescence brightness. It was still a formidablechallenge to fabricate CPL-active perovskites with significant luminescent asymmetry factor (glum) and full-colour-tailorableCPL properties. Indeed, compared to isotropic perovskites, anisotropic perovskite nanowires (NWs)were conducive to carrier separation and transport for polarization enhancement. Herein, three types of CsPb(Br/I)3 NWs with green, orange, red fluorescence (FL) were respectively synthesized and assembled into chiral NWfilms. The right-handed/left-handed chiral NW films constructed by 4+4 layers and 45° inter-angles exhibitshighly symmetric and mirror-like chiral signals. The strongest chiral intensity is more than 3000 medg. CPLsignals with wide colour gamut produce ranging from 480 nm to 800 nm, and tailorable CPL wavelengths aremanipulated by the emission wavelength of perovskite NWs. A giant CPL signal with a maximum glum of up to 10^(-1) is achieved. The polarization imaging of chiral NW films produces brilliant differential circularly polarizedstructural colours, making it more widely used in multilevel anti-counterfeiting systems. A significant break-throughlies in the development of advanced chiral perovskite materials with remarkable glum and tailorable CPLproperties, which sheds new light on optical anti-counterfeiting and intelligent information encryption.展开更多
Despite great progress in developing mode-selective light emission technologies based on self-emitting materials,few rewritable displays with modeselective multiple light emissions have been demonstrated.Herein,we pre...Despite great progress in developing mode-selective light emission technologies based on self-emitting materials,few rewritable displays with modeselective multiple light emissions have been demonstrated.Herein,we present a rewritable triple-mode light-emitting display enabled by stimuli-interactive fluorescence(FL),room-temperature phosphorescence(RTP),and electroluminescence(EL).The display comprises coplanar electrodes separated by a gap,a polymer composite with FL inorganic phosphors(EL/FL layer),and a polymer composite with solvent-responsive RTP additives(RTP layer).Upon 254 nm UV exposure,a dual-mode emission of RTP and FL occurs from the RTP and EL/FL layers,respectively.When a polar liquid,besides water,is applied on the display and an AC field is applied between the coplanar electrodes,EL from the EL/FL layer is triggered,and the display operates in a triple mode.Interestingly,when water is applied to the display,the RTP mode is deactivated,rendering the display to operate in a dual mode of FL and EL.By manipulating the evaporation of the applied polar liquids and water,the mode-selective light emission of FL,RTP,and EL is rewritable in the triple-mode display.Additionally,a high-security full-color information encryption display is demonstrated,wherein the information of digital numbers,letters,and Morse code encoded in one optical mode is only deciphered when properly matched with that encoded in the other two modes.Thus,this article outlines a strategy to fulfill the substantial demand for high-security personalized information based on room-temperature multi-light-emitting displays.展开更多
基金the financial support from the National Natural Science Foundation of China(Nos.21971040,22171045,and 22371046)。
文摘Ln-containing polyoxoniobates(PONbs)have appealing applications in luminescence,information encryption and magnetic fields,but the synthesis of PONbs containing high-nuclearity Ln-O clusters is challenging due to the easy hydrolysis of Ln^(3+)ions in alkaline environments.In this paper,we are able to integrate CO_(3)^(2-)and high-nuclearity Ln-O clusters into PONb to construct an inorganic giant Eu_(19)-embedded PONb H_(49)K_(16)Na_(13)(H_(2)O)_(63)[Eu_(21)O_(2)(OH)_(7)(H_(2)O)_(5)(Nb_(7)O_(22))_(10)(Nb_(2)O_(6))_(2)(CO_(3))_(18)]·91H_(2)O(1),which contains the highest nuclearity Eu-O clusters and the largest number of Eu^(3+)ions among PONbs.In addition,the film that was prepared by mixing 1 with gelatin and glycerol,exhibits reversible luminescence switching behavior under acid/alkali stimulation and has been used to create a fluorescence-encoded information approach.This work paves a feasible strategy for the construction of high-nuclearity Ln-O cluster-containing PONbs and the expansion of the application of Ln-containing PONbs in information encryption.
基金financial supports from National Key Research and Development Program of China(No.2022YFB3806200)。
文摘With the rapid development of holographic technology,metasurface-based holographic communication schemes have demonstrated immense potential for electromagnetic(EM)multifunctionality.However,traditional passive metasurfaces are severely limited by their lack of reconfigurability,hindering the realization of versatile holographic applications.Origami,an art form that mechanically induces spatial deformations,serves as a platform for multifunctional devices and has garnered significant attention in optics,physics,and materials science.The Miura-ori folding paradigm,characterized by its continuous reconfigurability in folded states,remains unexplored in the context of holographic imaging.Herein,we integrate the principles of Rosenfeld with L-and D-metal chiral enantiomers on a Miura-ori surface to tailor the aperture distribution.Leveraging the continuously tunable nature of the Miura-ori's folded states,the chiral response of the metallic structures varies across different folding configurations,enabling distinct EM holographic imaging functionalities.In the planar state,holographic encryption is achieved.Under specific folding conditions and driven by spin circularly polarized(CP)waves at a particular frequency,multiplexed holographic images can be reconstructed on designated focal planes with CP selectivity.Notably,the fabricated origami metasurface exhibits a large negative Poisson ratio,facilitating portability and deployment and offering novel avenues for spin-selective systems,camouflage,and information encryption.
基金financially supported by the National Key R&D Program of China(Nos.2023YFB3812400,2023YFB3812403)National Natural Foundation of China(Nos.52273206,52350233)+1 种基金Hunan Provincial Natural Science Foundation(No.2021JJ10029)Huxiang High-level Talent Gathering Project(No.2022RC4039).
文摘Photoswitchable fluorescent polymeric nanoparticles were widely concerned because of their excellent features including the flexible design,easy preparation and functionalization,and thus exhibited great application potential in information encryption,anti-counterfeiting,but remained challenging in improving the security.Herein,we described a self-erased time-resolved information encryption via using photoswitchable dual-color fluorescent polymeric nanoparticles(PDFPNs)containing two fluorescence dyes(blue and red)and photochromic spiroxazine derivatives.In view of the different thermo-induced isomerization rates of photochromic spiroxazine derivatives in different flexible substrates,the decoloration rate of PDFPNs can be programmatically tuned by regulating ratio between rigid polymer and flexible polymer.Therefore,after ultraviolet light(UV)irradiation,correct information could only be recognized in preestablished time during the self-erased process.Our results indicated that PDFPNs exhibited fast photo-responsibility(2 min),high fluorescence contrast,well-pleasing photo-reversibility(>20 times),and programmable thermo-responsiveness(24 s-6 h).We thus demonstrated their application in the selferased time-resolved information encryption and anti-counterfeiting with high security.
基金supported by the National Natural Science Foundation of China(Nos.22220102004,22025503)Shanghai Municipal Science and Technology Major Project(No.2018SHZDZX03)+4 种基金the Innovation Program of Shanghai Municipal Education Commission(No.2023ZKZD40)the Fundamental Research Funds for the Central Universitiesthe Programme of Introducing Talents of Discipline to Universities(No.B16017)Science and Technology Commission of Shanghai Municipality(No.21JC1401700)the Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study(No.SN-ZJU-SIAS-006)。
文摘Dynamic assembly on time scale is common in biological systems but rare for artificial materials,especially for smart luminescent materials.Programming molecular assembly in a spatio-temporal manner and resulting in white-light-including multicolor fluorescence with time-dynamic features remains challenging.Herein,controlling molecular assembly on time scale is achieved by integrating a pH-responsive motif to a transient alkaline solution which is fabricated by activators(NaOH)and deactivators(esters),leading to automatic assembly on time scale and time-dependent multicolor fluorescence changing from blue to white and yellow.The kinetics of the assembly process is dependent on the ester hydrolysis process,which can be controlled by varying ester concentrations,temperature,initial pH,stirring rate and ester structures.This dynamic fluorescent system can be further developed for intelligent fluorescent materials such as fluorescent ink,three-dimension(3D)codes and even four-dimension(4D)codes,exhibiting a promising potential for information encryption.
基金supported by the National Natural Science Foundation of China(No.22005061)the Natural Science Foundation of Jiangxi Province(No.20224BAB214009).
文摘Crystal polymers or liquid crystal elastomers undergo a phase transition that results in a change in the corresponding optical properties,which has the potential to be applied in areas such as information encryption and anti-counterfeiting.The utilization of these materials for patterning purposes requires different phase transition temperatures.However,once prepared,altering the phase transition temperature of them presents significant challenges.Herein,a poly(oxime-ester)(POE)network is developed to achieve high-resolution and multilevel patterning by photo-induced isomerization.The as-prepared POE exhibits the ability to transition from an opaque state to a transparent state under temperature stimuli,with the transition temperature and kinetics dependent on UV light exposure time.Thus,complex patterns and information can be encrypted through different selective regional exposure time and decrypted under specific temperature or cooling time.Furthermore,we illustrate an example of temporal communication,where cooling time or temperature serves as the encoded information.This research expands the application scope of advanced encryption materials,showcasing the potential of POE in dynamic information encryption and decryption processes.
文摘A novel self-recoverable mechanoluminescent phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) was developed by the high-tem-perature solid-state reaction method,and its luminescence properties were investigated.Ca_(5)Ga_(6)O_(14)∶Eu^(3+)can produce red mechanoluminescence,and importantly,it shows good repeatability.The mechanoluminescence of Ca_(5)Ga_(6)O_(14)∶Eu^(3+) results from the piezoelectric field generated inside the material under stress,rather than the charge carriers stored in the traps,which can be confirmed by the multiple cycles of mechanoluminescence tests and heat treatment tests.The mechanoluminescence color can be turned from red to green by co-doping varied concentrations of Tb^(3+),which may be meaningful for encrypted letter writing.The encryption scheme for secure communication was devised by harnessing mechanoluminescence patterns in diverse shapes and ASCII codes,which shows good encryption performance.The results suggest that the mechanoluminescence phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+),Tb^(3+)may be applied to the optical information encryption.
基金Project supported by the National Natural Science Foundation of China(Grant No.51972316)Ningbo Key Scientific and Technological Project(Grant No.2021Z116).
文摘Mimicking tactile perception is critical to the development of advanced interactive neuromorphic platforms.Inspired by cutaneous perceptual functions,a bionic tactile perceptual platform is proposed.PDMS-based tactile sensors act as bionic skin touch receptors.Flexible indium tin oxide neuromorphic transistors fabricated with a single-step mask pro-cessing act as artificial synapses.Thus,the tactile perceptual platform possesses the ability of information processing.Interestingly,the flexible tactile perception platform can find applications in information encryption and decryption.With adoption of cipher,signal transmitted by the perception platform is encrypted.Thus,the security of information transmis-sion is effectively improved.The flexible tactile perceptual platform would have potentials in cognitive wearable devices,advanced human-machine interaction system,and intelligent bionic robots.
基金supported by the National Natural Science Foundation of China(21975107)the Natural Science Foundation of Jiangsu Province(BK2019020945)financial support from the PolyU Departmental General Research Fund(P0046213)。
文摘Self-healing polyurethane-elastomers are highly desired in various fields.However,there is often a trade-off between mechanical properties and dynamic self-healing due to the mutually exclusive mechanism.Herein,we develop a self-healable and mechanically robust poly(oxime-urethane)elastomer(Zn-DAPU)to circumvent this inherent trade-off by incorporating zincpyridinyl cross-links into the hydrogen bonding and dynamic oxime-urethane supramolecular-covalent hybrid network.Benefiting from the synergistic strengthening of H-bonding and coordinate interactions,Zn-DAPU network performs tunable toughness with metal ion concentration change,which improves 345.2%and reaches 82.2 MJ m^(-3),with robust tensile strength of 22.8 MPa,Young's modulus of 37.1 MPa,and satisfactory elongation of 815.7%.The healing efficiency can be reached at 91.7%with a restored toughness of 75.4 MJ m^(-3)at 80℃for 10 h.Furthermore,zinc-contained networks exhibit photolysis behavior due to the homolytic cleavage of N-O bonds in oxime-urethane moieties,which can be functionalized further with fluorescamine as the specific information encryption coating with quick response codes(QRs)upon polyester fabric.This work provides valuable guidance towards the development of high-performance self-healing polyurethane and wearable functional materials.
基金supported by the National Natural Science Foundation of China(22371053,21674022,223B2103,51703034)the National Defense Science and Technology Innovation Zone(166 Program)the Outstanding Young Scholar Program。
文摘Dissipative self-assembly,which exploits energy inputs of chemical fuels to maintain the functional states far from equilibrium,is essential to living systems.Among a variety of fuels,carbon dioxide(CO_(2))gas has yet to be introduced in artificial dissipative materials.Here we describe a CO_(2)-fueled non-equilibrium co-assembly system that couples with a C1 catalytic pathway to dissipate the fuel for function output.Using common frustrated Lewis pair(FLP)as precursors,CO_(2)can dynamically bridge between them to constitute metastable amphiphiles,which not only highly activate CO_(2)but also enable their co-assembly with substrates into a transient fibrillar gel.In turn,the backward pathway is realized by cooperative C1 catalysis of the substrate and activated CO_(2)species in the assembled state.This can boost the depletion of gas fuel and facilitate disassembly to the sol.Moreover,tailoring the intrinsic substrate/FLP chemistries,as well as external cues,to shift the catalytic activity is accessible to regulate the period and lifetime of sol-gel-sol transition over a wide range.Based on the tunability in phase transition on a time scale,we develop time-gated information encryption materials using the transient FLP array loaded gas-encoded substrates,and the correct information can be read only at a specified time window.This study provides inspiration for a new paradigm of fuel for dissipative systems and their intelligent materials applications.
基金supported by the Zhejiang Sci-Tech University Shengzhou Innovation Research Institute(SYY2.023C000005)the National Natural Science Foundation of China(51803184)。
文摘Dynamic fluorescent materials capable of stimulus-responsive emission modulation have emerged as pivotal components in next-generation information security systems.This study presents a novel photoresponsive fluorescent composite system in which spiropyran(SP)was covalently grafted onto naphthalimide-functionalized silica aerogel matrices.These architectures exhibit reversible fluorescence resonance energy transfer between the naphthalimide donors and merocyanine-form of SP acceptors under ultraviolet irradiation,enabling dynamic emission shifting from green(blue)to red.The aggregation-induced emission characteristics of SP were used to engineer a smart material system that can reversibly regulate its distinct red fluorescence by precisely controlling the dispersion of amino groups on naphthalimide-functionalized silica aerogels.This spatial manipulation directly governs the molecular packing state of SP,enabling dynamic fluorescence modulation.A programmable control over the fluorescence chromatic transitions in the composite material was achieved by systematically adjusting the SP grafting densities(1%,2%,and 3%w/w).A unique mode of dynamic information encryption technology was developed by utilizing dynamic fluorescence variations.These materials can substantially enhance information encryption levels due to their precisely adjustable fluorescence properties in response to external stimuli over time.This makes the encryption process even more unpredictable and complex,thereby exponentially increasing the difficulty for unauthorized parties to replicate or decode the encrypted information.
基金supported by the National Natural Science Foundation of China(Nos.22475195 and 22101263)Postdoctoral Science Foundation of China(No.2024M762981)Zhengzhou University.
文摘Stimuli responsive phosphors with photoluminescence and thermoresponsive luminescence are intriguing for information encryption applications.Herein,two solvent-mediated,stimuli responsive phosphors based on phosphine-copper(I)iodide complexes 1 and 2 are reported.Complex 1 exhibited temperature-and excitation-wavelength-dependent dual-emission characteristics,displaying high energy(HE)and low energy(LE)bands with the quantum yield(QY)of 38.5%under 365 nm irradiation;but complex 2 exhibited no emission.The LE emission can be attributed to a triplet halide-to-metal charge transfer(^(3)XMCT)and copper-centered 4d→3s,3p transitions,whereas the HE emission originates from a triplet halide-to-ligand charge-transfer(^(3)XLCT).Importantly,in complex 2,the strong C—H∙∙∙Cl interaction in the supramolecular crystal lattice annihilated the sensitive cluster centered(3CC)excited state.Intriguingly,only the HE emission band of complex 2 can be successfully activated by high-energy excitation or changing the temperature.Nevertheless,the QY of complex 2 is 15.6%under 310 nm irradiation,which is smaller than that of complex 1 of 49.8%.This behavior was further confirmed by heating,where both complexes show HE emission.The reversible crystal transformation between complexes 1 and 2 was achieved.Furthermore,the reversible excitation-wavelength-dependent dual-emission and thermoresponsive properties make these phosphors suitable candidates for anti-counterfeiting and information encryption applications.
基金the National Natural Science Foundation of China(No.21807085)the Natural Science Foundation Research Project of Shaanxi Province(No.2023-JCYB-087)+2 种基金the Technology Innovation Leading Program of Shaanxi(No.2020QFY07-05)the Innovation Capability Support Program of Shaanxi(No.2022KJXX-88)the fund of Education Department of Shaanxi Province(Program No.Z20230071).
文摘Carbon dots(CDs)with aggregation-induced emission(AIE)have sparked significant interest in multidimensional anti-counterfeiting due to their exceptional fluorescence properties.However,the preparation of AIE CDs with multicolor solid-state fluorescence remains a formidable challenge due to its complicated construction.In the present work,a novel class of multicolor AIE CDs(M-CDs)were fabricated using selected precursor(salicylic acid,thiosalicylic acid,and 2,2'-dithiodibenzoic acid),with an eco-friendly,low-cost one-pot solvothermal method.In the dilute organic solution,M-CDs manifested blue emission,but upon aggregation in the presence of water,the red,yellow,green,and blue emissions were displayed due to the AIE effect.Structural analysis,coupled with theoretical calculations,revealed that the increase in the size of sp2 domains would lower the Eg and cause a red-shift emission wavelength.Significantly,the continuous emission of M-CDs from blue to red can be utilized as ink for multimode printing,enabling the creation of a variety of school badges and quick response codes.These findings hold promising implications for multi-information encryption applications.
基金supported by the National Natural Science Foundation of China(No.52075289).
文摘Surfaces with micro-nanoscale structures show different optical responses,including infrared reflection,thermal radiation,and protective coloration.Direct realization of structure camouflage is important for material functionalities.However,external cloaks or coatings are necessary in structure camouflage,which limits the surface functionality.Here,we propose a novel strategy for the direct structure camouflage through topography inherited removal(TIR)with ultrafast laser,featuring pristine topography preservation and scattering surface fabrication.After multistep TIR,pristine topographies are partially and uniformly removed to preserve the original designed structures.Optical response changes show the suppression of specular reflection by uniformizing reflected light intensity to a low level on the inherited surface.We produce various structure camouflages on large scaled substrates,and demonstrate applications of information encryption in code extraction and word recognition through structure camouflage.The proposed strategy opens opportunities for infrared camouflage and other technologies,such as thermal management,device security,and information encryption.
基金support from the National Key Research and Development Program of China(grant no.2022YFB3203500)the National Natural Science Foundation of China(grant nos.21788102,22125803,and 22020102006)+2 种基金project support by the Shanghai Municipal Science and Technology Major Project(grant no.2018SHZDZX03)the Program of Shanghai Academic/Technology Research Leader(grant no.20XD1421300)the Fundamental Research Funds for the Central Universities.
文摘Metal-free materials with multicolor tunable circularly polarized luminescence(CPL)are attractive because of their potential applications in information storage and encryption.Here,we designed two enantiomers composed of chiral dialkyl glutamides and achiral vibration-induced emission(VIE)moiety,which can switch on CPL after a simple gelation process.It is noteworthy that the CPL colors vary in different solvents,and this is attributed to various self-assembly-induced microstructures,in which the VIE moiety is restrained to different degrees.Accordingly,a multidimensional code system composed of a quick response code,a ultraviolet(UV)light-activated color code,and a CPL information figure was constructed.To our satisfaction,the system possesses multiple information-storage functions.The orthogonal anticounterfeiting and CPLenhanced encryption functions also improve the system information encryption ability.In brief,this study provides a practical example of CPL applied to information security and an effective approach to obtain a single-component color-tunable CPL material with multiple information storage and encryption functions as well.
基金National Natural Science Foundation of China,Grant/Award Numbers:92163126,52293380,52293383Beijing National Laboratory for Molecular Sciences,Grant/Award Number:BNLMS202308Fundamental Research Funds for the Central Universities,Grant/Award Numbers:63223030,63223017。
文摘Controlling the growth of bacterial biofilms in a specific pattern greatly enhances the study of cell-to-cell interactions and paves the way for expanding their biolog-ical applications.However,the development of simple,cost-effective,and highly resolved biopatterning approaches remains a persistent challenge.Herein,a pio-neering photodynamic biopatterning technique for the creation of living bacterial biofilms with customized geometries at high resolutions is presented.First of all,an outstanding aggregation-induced emission photosensitizer is synthesized to enable efficient photodynamic bacterial killing at a low concentration.By combining with custom-designed photomasks featuring both opaque and transparent patterns,the viability of photosensitizer-coated bacteria is successfully manipulated by control-ling the degree of light transmittance.This process leads to the formation of living bacterial biofilms with specific patterns replicated from the photomask.Such an innovative strategy can be employed to generate living bacterial biofilms composed of either mono-or multispecies,with a spatial resolution of approximately 24µm.Furthermore,its potential applications in information storage/encryption and antibi-otic screening are explored.This study provides an alternative way to understand and investigate the intricate interactions among bacteria within 3D biofilms,hold-ing great promise in the controlled fabrication of dynamic biological systems for advanced applications.
基金supported by the National Natural Science Foundation of China(22025503,22220102004)the Shanghai Municipal Science and Technology Major Project(2018SHZDZX03)+3 种基金the Fundamental Research Funds for the Central Universitiesthe Programme of Introducing Talents of Discipline to Universities(B16017)the Science and Technology Commission of Shanghai Municipality(21JC1401700)the Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study(SN-ZJU-SIAS-006)。
文摘Programming microscopic assembly mode to control macroscopic property is an attractive research objective.In particular,controlling molecular assembly to control fluorescence is of considerable interest for developing smart fluorescent materials.Herein,a color-tunable supramolecular emissive system was developed based on cucurbit[8]uril mediated host-vip assembly.Chemical designing for the molecular structures with minimized change resulted in different assembly modes and hence generating distinctive fluorescence,including green,yellow and orange with the addition of cucurbit[n]uril.Taking advantage of this feature,the advanced information encryption material(4D code)with multiple encryption levels and time-dependent encryption feature was developed.Such a code was dynamic on time scale,generating a series of 3D codes with time.The encrypted information only can be recognized by integrating time-coursed codes.This work provides a new insight for designing intelligent fluorescent materials for information encryption with high level of security.
基金supported by the Youth Innovation Promotion Association CAS(grant no.2018040)(J.M.Z.)the National Natural Science Foundation of China(grant nos.52173292 and U2004211)(J.M.Z.and J.Z.)the National Key Research and Development Project(grant no.2020YFC1910303)(J.Z.).
文摘Constructingeco-friendlystimuli-responsivephosphorescence materials remains challenging and fascinating.Herein,we use natural cellulose as the rawmaterial to prepare pH-responsive room-temperature phosphorescent(RTP)materials with excellent biodegradability by introducing anionic structures.The introduction of a phenylcarboxylate substituent not only promotes intersystem crossing but also brings about electrostatic-attractive and strong hydrogenbonding interactions,which enhance the intermolecular chain interactions.Therefore,the obtained anionic cellulose derivatives containing phenylcarboxylate groups exhibit ultra-long RTP.More intriguingly,these cellulose-based phosphorescent materials have a distinctive pH-responsive behavior.Under acidic conditions,the carboxylate is converted into the carboxylic acid,resulting in phosphorescence quenching.This process is reversible.Moreover,the obtained cellulosebased phosphorescent materials have excellent processability and can be easily processed into various material forms,such as film,coating,and pattern,by using eco-friendly aqueous solution processing strategies.Such proof-of-concept biomass-based phosphorescent materials with unique pH-responsive behavior and excellent processability have a huge potential in information encryption,advanced anti-counterfeiting,and food monitoring.
基金supported by the National Natural Science Foundation of China(No.22288101)the 111 Project(No.B17020)。
文摘Carbon dots(CDs)-based composites have shown impressive performance in fields of information encryption and sensing,however,a great challenge is to simultaneously implement multi-mode luminescence and room-temperature phosphorescence(RTP)detection in single system due to the formidable synthesis.Herein,a multifunctional composite of Eu&CDs@p RHO has been designed by co-assembly strategy and prepared via a facile calcination and impregnation treatment.Eu&CDs@p RHO exhibits intense fluorescence(FL)and RTP coming from two individual luminous centers,Eu3+in the free pores and CDs in the interrupted structure of RHO zeolite.Unique four-mode color outputs including pink(Eu^(3+),ex.254 nm),light violet(CDs,ex.365 nm),blue(CDs,254 nm off),and green(CDs,365 nm off)could be realized,on the basis of it,a preliminary application of advanced information encoding has been demonstrated.Given the free pores of matrix and stable RTP in water of confined CDs,a visual RTP detection of Fe^(3+)ions is achieved with the detection limit as low as 9.8μmol/L.This work has opened up a new perspective for the strategic amalgamation of luminous vips with porous zeolite to construct the advanced functional materials.
基金supported by the National Natural Science Foundation of China(22278184,22272065)the Natural Science Foundation of Jiangsu Province(BK20211530)+1 种基金the Fundamental Research Funds for the Central Universities(JUSRP622018,JUSRP202404022)the Key Research and Development Special Project of Yichun City,Jiangxi Province,China(2023ZDYFZX06).
文摘Perovskites showcased potential promise for innovative circularly polarized luminescence (CPL)-active multi-channelinformation encryption, owing to the exceptional luminescence brightness. It was still a formidablechallenge to fabricate CPL-active perovskites with significant luminescent asymmetry factor (glum) and full-colour-tailorableCPL properties. Indeed, compared to isotropic perovskites, anisotropic perovskite nanowires (NWs)were conducive to carrier separation and transport for polarization enhancement. Herein, three types of CsPb(Br/I)3 NWs with green, orange, red fluorescence (FL) were respectively synthesized and assembled into chiral NWfilms. The right-handed/left-handed chiral NW films constructed by 4+4 layers and 45° inter-angles exhibitshighly symmetric and mirror-like chiral signals. The strongest chiral intensity is more than 3000 medg. CPLsignals with wide colour gamut produce ranging from 480 nm to 800 nm, and tailorable CPL wavelengths aremanipulated by the emission wavelength of perovskite NWs. A giant CPL signal with a maximum glum of up to 10^(-1) is achieved. The polarization imaging of chiral NW films produces brilliant differential circularly polarizedstructural colours, making it more widely used in multilevel anti-counterfeiting systems. A significant break-throughlies in the development of advanced chiral perovskite materials with remarkable glum and tailorable CPLproperties, which sheds new light on optical anti-counterfeiting and intelligent information encryption.
基金supported by the Creative Materials Discovery Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(MSIT)(2022M3C1A3081211)This study was also supported by a grant from the NRF funded by MSIT(RS-2023-00208577)+1 种基金This study was financially supported by the Nano&Material Technology Development Program through the NRF funded by MSIT(RS-2024-00451891 and RS-2024-00416938)by the Open Resource Research Program of the Korea Institute of Science and Technology(2E32961).
文摘Despite great progress in developing mode-selective light emission technologies based on self-emitting materials,few rewritable displays with modeselective multiple light emissions have been demonstrated.Herein,we present a rewritable triple-mode light-emitting display enabled by stimuli-interactive fluorescence(FL),room-temperature phosphorescence(RTP),and electroluminescence(EL).The display comprises coplanar electrodes separated by a gap,a polymer composite with FL inorganic phosphors(EL/FL layer),and a polymer composite with solvent-responsive RTP additives(RTP layer).Upon 254 nm UV exposure,a dual-mode emission of RTP and FL occurs from the RTP and EL/FL layers,respectively.When a polar liquid,besides water,is applied on the display and an AC field is applied between the coplanar electrodes,EL from the EL/FL layer is triggered,and the display operates in a triple mode.Interestingly,when water is applied to the display,the RTP mode is deactivated,rendering the display to operate in a dual mode of FL and EL.By manipulating the evaporation of the applied polar liquids and water,the mode-selective light emission of FL,RTP,and EL is rewritable in the triple-mode display.Additionally,a high-security full-color information encryption display is demonstrated,wherein the information of digital numbers,letters,and Morse code encoded in one optical mode is only deciphered when properly matched with that encoded in the other two modes.Thus,this article outlines a strategy to fulfill the substantial demand for high-security personalized information based on room-temperature multi-light-emitting displays.
