Solar-driven water evaporation is considered to be a viable and very efficient technology for fresh water production.Unfortunately,the photothermal membrane has a low absorptivity,low photothermal conversion and poor ...Solar-driven water evaporation is considered to be a viable and very efficient technology for fresh water production.Unfortunately,the photothermal membrane has a low absorptivity,low photothermal conversion and poor recyclability,which are difficult to meet the demands of self-floating solar driven evaporators in practical applications.Herein,a hierarchical nanostructure Ni_(3)S_(2) has been prepared by in-situ growing method on Ni foam(NF),which shows excellent absorptivity,outstanding recyclable and high mechanically durable properties.The photothermal membrane was composed of hierarchical nanostructure Ni_(3)S_(2)@NF,which exhibited excellent solar absorption(93.13%) in the wavelength range of 250–2500 nm and sustained anti-corrosion capacity for one month.In addition,the hierarchical nanostructure Ni_(3)S_(2)@NF has good hydrophilicity and strong binding force,indicating this photothermal membrane exhibits good stability and outstanding photothermal conversion efficiency.An evaporation system based on 3D Ni_(3)S_(2)@NF membrane exhibited excellent water evaporation ability,the highest water evaporation rate(1.53 kg m^(-2)h^(-1)) and the photothermal conversion efficiency(84.7%) under 1 sun illumination.In the desalination experiment,the water evaporation rate and photothermal conversion efficiency almost keep constant over 5 cycles tests and do not decrease compared with the experiment in pure water.This result demonstrated that the Ni_(3)S_(2)@NF membrane has shown good corrosion resistance and outstanding recyclability.Due to the simple preparation method,low cost,outstanding recyclability and high mechanical durability in the sea water,this Ni_(3)S_(2)@NF membrane have great potential for long-term solar distillation applications.展开更多
Optical materials with circularly polarized luminescence(CPL)features have attracted a growing interest due to their crucial role in biological sensing,display,spintronics,information storage,and so forth.However,CPL ...Optical materials with circularly polarized luminescence(CPL)features have attracted a growing interest due to their crucial role in biological sensing,display,spintronics,information storage,and so forth.However,CPL emissions in hybrid nanoparticle systems,in particular,chirality transfer induced CPL from chiral plasmonic nanoparticles,have rarely been explored due to a lack of effective bottom-up synthesis method.Herein,we creatively take advantage of the newly introduced chiral plasmonic nanoparticles-gold nanohelicoid(GNH)to excite the CPL of achiral Rhodamine 6G(R6G).The fabricated GNH@R6G-SiO_(2)shows obvious CPL signals with|g_(lum)|up to 0.014.Compared with the single GNH,the photoluminescence(PL)dissymmetry factor of the single GNH@R6G-SiO_(2)is similar,but with 25 folds higher PL intensities under different circular polarization.Our research not only offers an effective and feasible method to fabricate single-particle level CPL-active materials,but also provides guidelines on how to regulate the CPL of achiral luminophores from chiral plasmonic nanostructures,thereby enlarging the category and quantity of CPL-active materials that can be applied for photonic technologies and visualization biosensing,especially some intracellular chirality related detection.展开更多
Traditional diagnosis of attention deficit hyperactivity disorder(ADHD)in children is primarily through a questionnaire filled out by parents/teachers and clinical observations by doctors.It is inefficient and heavily...Traditional diagnosis of attention deficit hyperactivity disorder(ADHD)in children is primarily through a questionnaire filled out by parents/teachers and clinical observations by doctors.It is inefficient and heavily depends on the doctor’s level of experience.In this paper,we integrate artificial intelligence(AI)technology into a software-hardware coordinated system to make ADHD diagnosis more efficient.Together with the intelligent analysis module,the camera group will collect the eye focus,facial expression,3D body posture,and other children’s information during the completion of the functional test.Then,a multi-modal deep learning model is proposed to classify abnormal behavior fragments of children from the captured videos.In combination with other system modules,standardized diagnostic reports can be automatically generated,including test results,abnormal behavior analysis,diagnostic aid conclusions,and treatment recommendations.This system has participated in clinical diagnosis in Department of Psychology,The Children’s Hospital,Zhejiang University School of Medicine,and has been accepted and praised by doctors and patients.展开更多
基金supported by the National Natural Science Foundation of China (No. 51571076, 21903068, 51702068, 51903068, 52072096)Open Project of State Key Laboratory of Urban Water Resource and Environment of Harbin Institute of Technology (No. HCK201716)。
文摘Solar-driven water evaporation is considered to be a viable and very efficient technology for fresh water production.Unfortunately,the photothermal membrane has a low absorptivity,low photothermal conversion and poor recyclability,which are difficult to meet the demands of self-floating solar driven evaporators in practical applications.Herein,a hierarchical nanostructure Ni_(3)S_(2) has been prepared by in-situ growing method on Ni foam(NF),which shows excellent absorptivity,outstanding recyclable and high mechanically durable properties.The photothermal membrane was composed of hierarchical nanostructure Ni_(3)S_(2)@NF,which exhibited excellent solar absorption(93.13%) in the wavelength range of 250–2500 nm and sustained anti-corrosion capacity for one month.In addition,the hierarchical nanostructure Ni_(3)S_(2)@NF has good hydrophilicity and strong binding force,indicating this photothermal membrane exhibits good stability and outstanding photothermal conversion efficiency.An evaporation system based on 3D Ni_(3)S_(2)@NF membrane exhibited excellent water evaporation ability,the highest water evaporation rate(1.53 kg m^(-2)h^(-1)) and the photothermal conversion efficiency(84.7%) under 1 sun illumination.In the desalination experiment,the water evaporation rate and photothermal conversion efficiency almost keep constant over 5 cycles tests and do not decrease compared with the experiment in pure water.This result demonstrated that the Ni_(3)S_(2)@NF membrane has shown good corrosion resistance and outstanding recyclability.Due to the simple preparation method,low cost,outstanding recyclability and high mechanical durability in the sea water,this Ni_(3)S_(2)@NF membrane have great potential for long-term solar distillation applications.
基金supported by the National Natural Science Foundation of China(No.21507054)the State Key Laboratory of Materials-Oriented Chemical Engineering(No.SKL-MCE-23B09)the open fund of Information Materials and Intelligent Sensing Laboratory of Anhui Province(No.IMIS202213).
文摘Optical materials with circularly polarized luminescence(CPL)features have attracted a growing interest due to their crucial role in biological sensing,display,spintronics,information storage,and so forth.However,CPL emissions in hybrid nanoparticle systems,in particular,chirality transfer induced CPL from chiral plasmonic nanoparticles,have rarely been explored due to a lack of effective bottom-up synthesis method.Herein,we creatively take advantage of the newly introduced chiral plasmonic nanoparticles-gold nanohelicoid(GNH)to excite the CPL of achiral Rhodamine 6G(R6G).The fabricated GNH@R6G-SiO_(2)shows obvious CPL signals with|g_(lum)|up to 0.014.Compared with the single GNH,the photoluminescence(PL)dissymmetry factor of the single GNH@R6G-SiO_(2)is similar,but with 25 folds higher PL intensities under different circular polarization.Our research not only offers an effective and feasible method to fabricate single-particle level CPL-active materials,but also provides guidelines on how to regulate the CPL of achiral luminophores from chiral plasmonic nanostructures,thereby enlarging the category and quantity of CPL-active materials that can be applied for photonic technologies and visualization biosensing,especially some intracellular chirality related detection.
基金Project supported by the National Natural Science Foundation of China(No.61625107)。
文摘Traditional diagnosis of attention deficit hyperactivity disorder(ADHD)in children is primarily through a questionnaire filled out by parents/teachers and clinical observations by doctors.It is inefficient and heavily depends on the doctor’s level of experience.In this paper,we integrate artificial intelligence(AI)technology into a software-hardware coordinated system to make ADHD diagnosis more efficient.Together with the intelligent analysis module,the camera group will collect the eye focus,facial expression,3D body posture,and other children’s information during the completion of the functional test.Then,a multi-modal deep learning model is proposed to classify abnormal behavior fragments of children from the captured videos.In combination with other system modules,standardized diagnostic reports can be automatically generated,including test results,abnormal behavior analysis,diagnostic aid conclusions,and treatment recommendations.This system has participated in clinical diagnosis in Department of Psychology,The Children’s Hospital,Zhejiang University School of Medicine,and has been accepted and praised by doctors and patients.
