Noble metal nanoparticles exhibit unique surface plasmon resonance dependent optical properties.On this basis,gold nanoparticles(AuNPs)encapsulated in metal–organic frameworks(MOFs)can form AuNPs@MOFs composites to m...Noble metal nanoparticles exhibit unique surface plasmon resonance dependent optical properties.On this basis,gold nanoparticles(AuNPs)encapsulated in metal–organic frameworks(MOFs)can form AuNPs@MOFs composites to modulate the optical properties of fluorescent molecules,which is less reported.In this paper,based on the fluorescence enhancement effect of AuNPs on 2-(2-hydroxyphenyl)-1H-benzimidazole(HPBI)molecules,zeolitic imidazolate framework-8(ZIF-8)crystals with structural stability were introduced.AuNPs@ZIF-8 exhibited a significantly pronounced fluorescence enhancement of the HPBI molecules.In addition,by comparing the fluorescence characteristics of the HPBI molecules adsorbed on AuNPs@ZIF-8 and those captured in AuNPs@ZIF-8,we found that the ZIF-8 can act as a spacer layer with highly effective near-field enhancement.All our preliminary results shed light on future research on the composite structures of noble metal particles and MOFs for fluorescent probes and sensing applications.展开更多
Real-time thermal sensing through flexible temperature sensors in extreme environments is critically essential for precisely monitoring chemical reactions,propellant combustions,and metallurgy processes.However,despit...Real-time thermal sensing through flexible temperature sensors in extreme environments is critically essential for precisely monitoring chemical reactions,propellant combustions,and metallurgy processes.However,despite their low response speed,most existing thermal sensors and related sensing materials will degrade or even lose their sensing performances at either high or low temperatures.Achieving a microsecond response time over an ultrawide temperature range remains challenging.Here,we design a flexible temperature sensor that employs ultrathin and consecutive Mo1−xWxS2 alloy films constructed via inkjet printing and a thermal annealing strategy.The sensing elements exhibit a broad work range(20 to 823 K on polyimide and 1,073 K on flexible mica)and a record-low response time(about 30μs).These properties enable the sensors to detect instantaneous temperature variations induced by contact with liquid nitrogen,water droplets,and flames.Furthermore,a thermal sensing array offers the spatial mapping of arbitrary shapes,heat conduction,and cold traces even under bending deformation.This approach paves the way for designing unique sensitive materials and flexible sensors for transient sensing under harsh conditions.展开更多
The transition metal trichalcogenides(TMTCs)are quasi-one-dimensional(1D)MX_(3)-type van der Waals layered semiconductors,where M is a transition metal element of groups IV and V,and X indicates chalcogen element.Due ...The transition metal trichalcogenides(TMTCs)are quasi-one-dimensional(1D)MX_(3)-type van der Waals layered semiconductors,where M is a transition metal element of groups IV and V,and X indicates chalcogen element.Due to the unique quasi-1D crystalline structures,they possess several novel electrical properties such as variable bandgaps,charge density waves,and superconductivity,and highly anisotropic optical,thermoelectric,and magnetic properties.The study of TMTCs plays an essential role in the 1D quantum materials field,enabling new opportunities in the material research dimension.Currently,tremendous progress in both materials and solid-state devices has been made,demonstrating promising applications in the realization of nanoelectronic devices.This review provides a comprehensive overview to survey the state of the art in materials,devices,and applications based on TMTCs.Firstly,the symbolic structure,current primary synthesis methods,and physical properties of TMTCs have been discussed.Secondly,examples of TMTC applications in various fields are presented,such as photodetectors,energy storage devices,catalysts,and sensors.Finally,we give an overview of the opportunities and future perspectives for the research of TMTCs,as well as the challenges in both basic research and practical applications.展开更多
文摘Noble metal nanoparticles exhibit unique surface plasmon resonance dependent optical properties.On this basis,gold nanoparticles(AuNPs)encapsulated in metal–organic frameworks(MOFs)can form AuNPs@MOFs composites to modulate the optical properties of fluorescent molecules,which is less reported.In this paper,based on the fluorescence enhancement effect of AuNPs on 2-(2-hydroxyphenyl)-1H-benzimidazole(HPBI)molecules,zeolitic imidazolate framework-8(ZIF-8)crystals with structural stability were introduced.AuNPs@ZIF-8 exhibited a significantly pronounced fluorescence enhancement of the HPBI molecules.In addition,by comparing the fluorescence characteristics of the HPBI molecules adsorbed on AuNPs@ZIF-8 and those captured in AuNPs@ZIF-8,we found that the ZIF-8 can act as a spacer layer with highly effective near-field enhancement.All our preliminary results shed light on future research on the composite structures of noble metal particles and MOFs for fluorescent probes and sensing applications.
基金supported by the National Natural Science Foundation of China(62304182,62371397,and 62288102)the Natural Science Foundation of Shaanxi Province(2023-JC-YB-495)+1 种基金the Fundamental Research Funds for the Central Universitiesthe start-up funds from Northwestern Polytechnical University(G2022WD01001 and 23GH02021).
文摘Real-time thermal sensing through flexible temperature sensors in extreme environments is critically essential for precisely monitoring chemical reactions,propellant combustions,and metallurgy processes.However,despite their low response speed,most existing thermal sensors and related sensing materials will degrade or even lose their sensing performances at either high or low temperatures.Achieving a microsecond response time over an ultrawide temperature range remains challenging.Here,we design a flexible temperature sensor that employs ultrathin and consecutive Mo1−xWxS2 alloy films constructed via inkjet printing and a thermal annealing strategy.The sensing elements exhibit a broad work range(20 to 823 K on polyimide and 1,073 K on flexible mica)and a record-low response time(about 30μs).These properties enable the sensors to detect instantaneous temperature variations induced by contact with liquid nitrogen,water droplets,and flames.Furthermore,a thermal sensing array offers the spatial mapping of arbitrary shapes,heat conduction,and cold traces even under bending deformation.This approach paves the way for designing unique sensitive materials and flexible sensors for transient sensing under harsh conditions.
基金We thank financial support from the National Key Research and Development Program of China(2020YFB2008501)the National Natural Science Foundation of China(11904289)+4 种基金the Key Research and Development Program of Shaanxi Province(2020ZDLGY04-08 and 2020GXLH-Z-027)the Natural Science Foundation of Shaanxi Province(2023-JC-YB-495,2019JQ-613,and 2022JQ-659)the Natural Science Foundation of Ningbo(202003N4003)the Fundamental Research Funds for the Central Universities(3102019PY004,31020190QD010,and 3102019JC004)the start-up funds from Northwestern Polytechnical University,and open research fund of the State Key Laboratory of Organic Electronics and Information Displays。
文摘The transition metal trichalcogenides(TMTCs)are quasi-one-dimensional(1D)MX_(3)-type van der Waals layered semiconductors,where M is a transition metal element of groups IV and V,and X indicates chalcogen element.Due to the unique quasi-1D crystalline structures,they possess several novel electrical properties such as variable bandgaps,charge density waves,and superconductivity,and highly anisotropic optical,thermoelectric,and magnetic properties.The study of TMTCs plays an essential role in the 1D quantum materials field,enabling new opportunities in the material research dimension.Currently,tremendous progress in both materials and solid-state devices has been made,demonstrating promising applications in the realization of nanoelectronic devices.This review provides a comprehensive overview to survey the state of the art in materials,devices,and applications based on TMTCs.Firstly,the symbolic structure,current primary synthesis methods,and physical properties of TMTCs have been discussed.Secondly,examples of TMTC applications in various fields are presented,such as photodetectors,energy storage devices,catalysts,and sensors.Finally,we give an overview of the opportunities and future perspectives for the research of TMTCs,as well as the challenges in both basic research and practical applications.
