Encoding information in light polarization is of great importance in facilitating optical data storage(ODS)for information security and data storage capacity escalation.However,despite recent advances in nanophotonic ...Encoding information in light polarization is of great importance in facilitating optical data storage(ODS)for information security and data storage capacity escalation.However,despite recent advances in nanophotonic techniques vastly en-hancing the feasibility of applying polarization channels,the data fidelity in reconstructed bits has been constrained by severe crosstalks occurring between varied polarization angles during data recording and reading process,which gravely hindered the utilization of this technique in practice.In this paper,we demonstrate an ultra-low crosstalk polarization-en-coding multilayer ODS technique for high-fidelity data recording and retrieving by utilizing a nanofibre-based nanocom-posite film involving highly aligned gold nanorods(GNRs).With parallelizing the gold nanorods in the recording medium,the information carrier configuration minimizes miswriting and misreading possibilities for information input and output,respectively,compared with its randomly self-assembled counterparts.The enhanced data accuracy has significantly im-proved the bit recall fidelity that is quantified by a correlation coefficient higher than 0.99.It is anticipated that the demon-strated technique can facilitate the development of multiplexing ODS for a greener future.展开更多
During the last decades,the utilization of osmotic pressure-driven forward osmosis technology for wastewater treatment has drawn great interest,due to its high separation efficiency,low membrane fouling propensity,hig...During the last decades,the utilization of osmotic pressure-driven forward osmosis technology for wastewater treatment has drawn great interest,due to its high separation efficiency,low membrane fouling propensity,high water recovery and relatively low energy consumption.This review paper summarizes the implementation of forward osmosis technology for various wastewater treatment including municipal sewage,landfill leachate,oil/gas exploitation wastewater,textile wastewater,mine wastewater,and radioactive wastewater.However,membrane fouling is still a critical issue,which affects water flux stability,membrane life and operating cost.Different membrane fouling types and corresponding fouling mechanisms,including organic fouling,inorganic fouling,biofouling and combined fouling are therefore further discussed.The fouling control strategies including feed pre-treatment,operation condition optimization,membrane selection and modification,membrane cleaning and tailoring the chemistry of draw solution are also reviewed comprehensively.At the end of paper,some recommendations are proposed.展开更多
As a broad-spectrum antiviral nanoparticle,the cell membrane nanodecoy is a promising strategy for preventing viral infections.However,most of the cell membrane nanodecoys can only catch virus and cannot induce inacti...As a broad-spectrum antiviral nanoparticle,the cell membrane nanodecoy is a promising strategy for preventing viral infections.However,most of the cell membrane nanodecoys can only catch virus and cannot induce inactivation,which may bring about a considerably high risk of re-infection owing to the possible viral escape from the nanodecoys.To tackle this challenge,sulfated liposomes are employed to mimic the cell membrane glycocalyx for constructing an artificial cell membrane glycocalyx nanodecoy that exhibits excellent anti-coronavirus activity against HCoV-OC43,wild-type SARS-CoV-2,Alpha and Delta variant SARS-CoV-2 pseudovirus.In addition,this nanodecoy,loaded with surface sulfate groups as SARS-CoV-2 receptor arrays,can enhance the antiviral capability to virus inactivation through destroying the virus membrane structure and transfer the spike protein to postfusion conformation.Integrating bio-inspired recognition and inactivation of viruses in a single supramolecular entity,the artificial cell membrane nanodecoy opens a new avenue for the development of theranostic antiviral nanosystems,whose mass production is favored due to the facile engineering of sulfated liposomes.展开更多
A type of scalable self-imaging capable of variable magnification or minification of periodic objects is demonstrated in the focal plane of a lens illuminated by a point source.The theory and the experimental results ...A type of scalable self-imaging capable of variable magnification or minification of periodic objects is demonstrated in the focal plane of a lens illuminated by a point source.The theory and the experimental results show that the self-imaging phenomenon can also be realized in the focal plane of a lens regardless of whether the distances satisfy the lens formula or not.The particular property of this scalable self-imaging effect is that the images in the focal plane can be controlled with different scaling factors only when the distances between the point source and the periodic object satisfy a certain condition.This discovery should open a new field of diffraction imaging and new application opportunities in precision measurement.展开更多
In this Letter, we propose a simple and effective approach for transforming a conventional Talbot array illuminator(TAI) with multilevel phase steps into a binary-phase TAI(BP-TAI) through detour phase encoding.The BP...In this Letter, we propose a simple and effective approach for transforming a conventional Talbot array illuminator(TAI) with multilevel phase steps into a binary-phase TAI(BP-TAI) through detour phase encoding.The BP-TAI is a binary(0 π) phase-only diffractive optical element, which can be utilized to generate a large-scale focal spots array with a high compression ratio.As an example, we design a square BP-TAI with the fraction parameter β= 15 for achieving a square multifocal lattice with a high compression ratio β^2.Theoretical analysis and experimental results demonstrate that the detour phase encoding is efficient for designing the BP-TAI, especially with the high compression ratio.Such results may be exploited in practical large-scale optical trapping and X-ray imaging.展开更多
We propose a metalens for coaxial double wavelength focusing.One focusing spot is a circular solid spot,and the other focusing spot is a doughnut-shaped spot that is circling the solid spot.The designed metalens was c...We propose a metalens for coaxial double wavelength focusing.One focusing spot is a circular solid spot,and the other focusing spot is a doughnut-shaped spot that is circling the solid spot.The designed metalens was composed of a met a-molecular nanostructured cell array.Each meta-molecular nanostructured cell was divided into four squares.Two slots with exactly the same shape,but usually with the rotation angle measured clockwise from the positive x axis,are etched into the gold film in two diagonally connected squares.Another two slots with the same shape but with the rotation angle measured counter-clockwise from the positive x axis are etched into another two diagonally connected squares in the same cell.The lasers with two different wavelengths are trans?formed into right-handed and left-handed circularly polarized beams,respectively.The two sets of slots with different azimuthal rotations modulated the phases of incident right-handed and left-handed circularly polarized beams independently.The numerical simulation with finite-difference time-domain(FDTD)software was carried out,and the experimental verification was also implemented.Both the experimental result and the numerical simulation agree well with the theoretical design.展开更多
Dielectric nanostructures are widely embraced in the field of structural color design due to their low-cost characteristics,enabling sub-micron scale color printing.However,challenges still exist in the selection of s...Dielectric nanostructures are widely embraced in the field of structural color design due to their low-cost characteristics,enabling sub-micron scale color printing.However,challenges still exist in the selection of structures and image encryption.In this study,we propose a method for printing dual patterns using tailored scattering structures based on two-photon polymerization.We extensively analyze the color performance of each structure in zeroth-order diffraction under cross-polarized transmission and bright-field transmission illumination.By selecting appropriate structures based on their characteristics,we prepared full-color panels and successfully utilized these panels to print both color patterns and dual patterns,achieving multi-level control of color and information.Based on the above study,a large-sale color pattern with a hidden message in an area of 3.2 cm×2.4 cm is printed,which can be directly observed.Our results demonstrate a sustainable and eco-friendly approach to color preparation,offering innovative strategies and methods for the fields of color science and steganography for information security.展开更多
基金financial supports from the National Natural Science Foundation of China(Grant Nos.62174073,61875073,11674130,91750110 and 61522504)the National Key R&D Program of China(Grant No.2018YFB1107200)+3 种基金the Guangdong Provincial Innovation and Entrepren-eurship Project(Grant No.2016ZT06D081)the Natural Science Founda-tion of Guangdong Province,China(Grant Nos.2016A030306016 and 2016TQ03X981)the Pearl River Nova Program of Guangzhou(Grant No.201806010040)the Technology Innovation and Development Plan of Yantai(Grant No.2020XDRH095).
文摘Encoding information in light polarization is of great importance in facilitating optical data storage(ODS)for information security and data storage capacity escalation.However,despite recent advances in nanophotonic techniques vastly en-hancing the feasibility of applying polarization channels,the data fidelity in reconstructed bits has been constrained by severe crosstalks occurring between varied polarization angles during data recording and reading process,which gravely hindered the utilization of this technique in practice.In this paper,we demonstrate an ultra-low crosstalk polarization-en-coding multilayer ODS technique for high-fidelity data recording and retrieving by utilizing a nanofibre-based nanocom-posite film involving highly aligned gold nanorods(GNRs).With parallelizing the gold nanorods in the recording medium,the information carrier configuration minimizes miswriting and misreading possibilities for information input and output,respectively,compared with its randomly self-assembled counterparts.The enhanced data accuracy has significantly im-proved the bit recall fidelity that is quantified by a correlation coefficient higher than 0.99.It is anticipated that the demon-strated technique can facilitate the development of multiplexing ODS for a greener future.
基金supports from National Key Research and Development Program of China(Grant Nos.2020YFB1709301 and 2020YFB1709304).
文摘During the last decades,the utilization of osmotic pressure-driven forward osmosis technology for wastewater treatment has drawn great interest,due to its high separation efficiency,low membrane fouling propensity,high water recovery and relatively low energy consumption.This review paper summarizes the implementation of forward osmosis technology for various wastewater treatment including municipal sewage,landfill leachate,oil/gas exploitation wastewater,textile wastewater,mine wastewater,and radioactive wastewater.However,membrane fouling is still a critical issue,which affects water flux stability,membrane life and operating cost.Different membrane fouling types and corresponding fouling mechanisms,including organic fouling,inorganic fouling,biofouling and combined fouling are therefore further discussed.The fouling control strategies including feed pre-treatment,operation condition optimization,membrane selection and modification,membrane cleaning and tailoring the chemistry of draw solution are also reviewed comprehensively.At the end of paper,some recommendations are proposed.
基金supported by the National Key Research&Development Program of China(No.2021YFC2301204)Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(2022SZ-TD010)the Fundamental Research Funds for the Central Universities(No.2022ZFJH003).We thank Lingyun Wu in the Center of Cryo-Electron Microscopy(CCEM),Zhejiang University for her technical assistance on Cryo-EM.
文摘As a broad-spectrum antiviral nanoparticle,the cell membrane nanodecoy is a promising strategy for preventing viral infections.However,most of the cell membrane nanodecoys can only catch virus and cannot induce inactivation,which may bring about a considerably high risk of re-infection owing to the possible viral escape from the nanodecoys.To tackle this challenge,sulfated liposomes are employed to mimic the cell membrane glycocalyx for constructing an artificial cell membrane glycocalyx nanodecoy that exhibits excellent anti-coronavirus activity against HCoV-OC43,wild-type SARS-CoV-2,Alpha and Delta variant SARS-CoV-2 pseudovirus.In addition,this nanodecoy,loaded with surface sulfate groups as SARS-CoV-2 receptor arrays,can enhance the antiviral capability to virus inactivation through destroying the virus membrane structure and transfer the spike protein to postfusion conformation.Integrating bio-inspired recognition and inactivation of viruses in a single supramolecular entity,the artificial cell membrane nanodecoy opens a new avenue for the development of theranostic antiviral nanosystems,whose mass production is favored due to the facile engineering of sulfated liposomes.
基金supported by the National Natural Science Foundation of China(NSFC)(Nos.61675093 and61705096)the Natural Science Foundation of Shandong Province(No.ZR2017MA035)+1 种基金the Shandong Province Higher Educational Science and Technology Program(No.J17KA176)the Taishan Scholars Project of Shandong Province(No.ts2015110055)。
文摘A type of scalable self-imaging capable of variable magnification or minification of periodic objects is demonstrated in the focal plane of a lens illuminated by a point source.The theory and the experimental results show that the self-imaging phenomenon can also be realized in the focal plane of a lens regardless of whether the distances satisfy the lens formula or not.The particular property of this scalable self-imaging effect is that the images in the focal plane can be controlled with different scaling factors only when the distances between the point source and the periodic object satisfy a certain condition.This discovery should open a new field of diffraction imaging and new application opportunities in precision measurement.
基金supported by the National Natural Science Foundation of China (NSFC) (Nos. 61675093 and 61705096)the Natural Science Foundation of Shandong Province (No. ZR2017MA035)+1 种基金the Shandong Province Higher Educational Science and Technology Program (No. J17KA176)the Taishan Scholars Project of Shandong Province (No. ts2015110055)
文摘In this Letter, we propose a simple and effective approach for transforming a conventional Talbot array illuminator(TAI) with multilevel phase steps into a binary-phase TAI(BP-TAI) through detour phase encoding.The BP-TAI is a binary(0 π) phase-only diffractive optical element, which can be utilized to generate a large-scale focal spots array with a high compression ratio.As an example, we design a square BP-TAI with the fraction parameter β= 15 for achieving a square multifocal lattice with a high compression ratio β^2.Theoretical analysis and experimental results demonstrate that the detour phase encoding is efficient for designing the BP-TAI, especially with the high compression ratio.Such results may be exploited in practical large-scale optical trapping and X-ray imaging.
基金supported by the National Natural Science Foundation of China(Nos.61675093,61775140,and 61905106)the Natural Science Foundation of Shandong Province(Nos.ZR2017MA035 and ZR2019PF013)。
文摘We propose a metalens for coaxial double wavelength focusing.One focusing spot is a circular solid spot,and the other focusing spot is a doughnut-shaped spot that is circling the solid spot.The designed metalens was composed of a met a-molecular nanostructured cell array.Each meta-molecular nanostructured cell was divided into four squares.Two slots with exactly the same shape,but usually with the rotation angle measured clockwise from the positive x axis,are etched into the gold film in two diagonally connected squares.Another two slots with the same shape but with the rotation angle measured counter-clockwise from the positive x axis are etched into another two diagonally connected squares in the same cell.The lasers with two different wavelengths are trans?formed into right-handed and left-handed circularly polarized beams,respectively.The two sets of slots with different azimuthal rotations modulated the phases of incident right-handed and left-handed circularly polarized beams independently.The numerical simulation with finite-difference time-domain(FDTD)software was carried out,and the experimental verification was also implemented.Both the experimental result and the numerical simulation agree well with the theoretical design.
基金Natural Science Foundation of Heilongjiang Province(LH2022F017)Science and Technology Commission of Shanghai Municipality(SKLSFO2022-01,SKLSFO2022-03)+4 种基金State Key Laboratory of Advanced Optical Communication Systems and Networks(Shanghai Jiao Tong University,2023GZKF022)Henan Key Laboratory of Laser and Opto-electric Information Technology(JG2023-RF01)Exchange Project for Key Lab of Optical Fiber Sensing and Communications(Ministry of Education of China)National Natural Science Foundation of China(62075078,62135004,62174073)Knowledge Innovation Program of Wuhan-Shuguang Project(2022010801020095).
文摘Dielectric nanostructures are widely embraced in the field of structural color design due to their low-cost characteristics,enabling sub-micron scale color printing.However,challenges still exist in the selection of structures and image encryption.In this study,we propose a method for printing dual patterns using tailored scattering structures based on two-photon polymerization.We extensively analyze the color performance of each structure in zeroth-order diffraction under cross-polarized transmission and bright-field transmission illumination.By selecting appropriate structures based on their characteristics,we prepared full-color panels and successfully utilized these panels to print both color patterns and dual patterns,achieving multi-level control of color and information.Based on the above study,a large-sale color pattern with a hidden message in an area of 3.2 cm×2.4 cm is printed,which can be directly observed.Our results demonstrate a sustainable and eco-friendly approach to color preparation,offering innovative strategies and methods for the fields of color science and steganography for information security.
