Lignin is the most abundant aromatic polymer in nature,which is rich in a large number of benzene ring structures and active functional groups.The molecular structure of lignin has unique designability and controllabi...Lignin is the most abundant aromatic polymer in nature,which is rich in a large number of benzene ring structures and active functional groups.The molecular structure of lignin has unique designability and controllability,and is a class of functional materials with great application prospects in energy storage and conversion.Here,this review firstly focuses on the concept,classification,and physicochemical property of lignin.Then,the application research of lignin in the field of electrochemical storage materials and devices are summarized,such as lignin-carbon materials and lignin-carbon composites in supercapacitors and secondary batteries.Finally,this review points out the bottlenecks that need to be solved urgently and the prospects for future research priorities.展开更多
The analytical performance of H+-selective solid-contact ion-selective electrodes(SCISEs)based on solid contact polyaniline doped with chloride(PANI(Cl))and poly(3,4-ethylenedioxythiophene)doped with poly(styrene sulf...The analytical performance of H+-selective solid-contact ion-selective electrodes(SCISEs)based on solid contact polyaniline doped with chloride(PANI(Cl))and poly(3,4-ethylenedioxythiophene)doped with poly(styrene sulfonate)(PEDOT(PSS))was characterized by a developed coulometric signal transduction method.PEDOT(PSS)solid contact is covered by PVC based H+-selective membrane.The obtained coulometric signal demonstrates that the cumulated charge can be amplified by increasing the capacitance of solid contact.SCISEs covered with spin-coated membrane behave faster amperometric response than electrodes with drop-cast mem-brane.In contrast to earlier works,the amperometric response and impedance spectrum demonstrates H+transfer through SCISEs is independent from the thickness of membrane.The exceptional behavior of PANI(Cl)H+-SCISEs shows that the capacitance estimated from impedance spectrum at low frequency 10 mHz and coulometric signal of PANI(Cl)based SCISEs is influenced by the applied po-tentials,whereas PEDOT(PSS)solid contact is independent from the chosen applied potentials.Furthermore,preliminary investiga-tions of coulometric signal transduction on flexible pH sensor implies its potential applications in wearable sensors for sweat ion concentration detection.展开更多
This paper shows hidden information from the plastic deformation of metallic glasses using machine learning.Ni_(62)Nb_(38)(at.%)metallic glass(MG)film and Zr_(64.13)Cu_(15.75)Al_(10)Ni_(10.12)(at.%)BMG,as two model ma...This paper shows hidden information from the plastic deformation of metallic glasses using machine learning.Ni_(62)Nb_(38)(at.%)metallic glass(MG)film and Zr_(64.13)Cu_(15.75)Al_(10)Ni_(10.12)(at.%)BMG,as two model materials,are considered for nano-scratching and compression experiment,respectively.The interconnectedness among variables is probed using correlation analysis.The evolvement mechanism and governing system of plastic deformation are explored by combining dynamical neural networks and sparse identification.The governing system has the same basis function for different experiments,and the coefficient error is≤0.14%under repeated experiments,revealing the intrinsic quality in metallic glasses.Furthermore,the governing system is conducted based on the preceding result to predict the deformation behavior.This shows that the prediction agrees well with the real value for the deformation process.展开更多
Recently,materials with circularly polarized luminescence(CPL)properties have attracted substantial attention because they offer new perspectives in fundamental research and wide applications in photonics,bio-encoding...Recently,materials with circularly polarized luminescence(CPL)properties have attracted substantial attention because they offer new perspectives in fundamental research and wide applications in photonics,bio-encoding,catalysis,and so forth.Such importance has recently promoted the development of CPL-active materials from the traditional realm of organics to newly released areas in inorganics.Due to the advantages of inorganic nanomaterials in stability,high luminescent quantum efficiency,material diversity,and the diversity of shapes and sizes,extensive research about CPL active inorganic nanomaterials has been done in the past decades leading to great signs of progress on synthesis,characterizations,and potential applications.In this review,therefore,we will thoroughly describe the general design principles of inorganic nanomaterials with CPL activity,basically according to the origins of chirality in inorganic nanomaterials:intrinsic chirality in inorganic nanomaterials,ligand-induced chirality,and structural chirality caused by the supramolecular assembly,respectively.The representative applications of the CPL-active inorganic nanomaterials are presented with respect to challenges,prospective,and problems that unsolved to date.展开更多
Chaos has been well understood in dynamic system, however, how the chaotic behavior occur in jerky flow in material, is still not clear, and is lack of specific chaotic attractor. Here the jerky evolution of lateral f...Chaos has been well understood in dynamic system, however, how the chaotic behavior occur in jerky flow in material, is still not clear, and is lack of specific chaotic attractor. Here the jerky evolution of lateral force and the stair-like fluctuation of lateral displacement are observed for Ni62 Nb38(at.%) metallic glass film during nanoscratch process. This jerky flow is investigated by using the largest Lyapunov exponent, Kolmogorov entropy and fractal dimension, and chaotic behavior of lateral force-time and normal displacement-lateral displacement sequences is verified. In addition to time series analysis, it is found that jerk equation can be used to describe the jerky flow of the metallic-glass film during nanoscratch. More importantly, unambiguous chaotic attractor is presented by jerky dynamics using "jerk"-singularities, namely the total change rate of lateral force relative to scratch time. These reveal an inner connection between jerky flow and jerky dynamics in nanoscratch of a metallic-glass film.展开更多
基金supported by the National Natural Science Foundation of China(NSFC)(No.21908071,21908205,22108135)Natural Science Foundation of Guangdong,(2020A1515011319)+3 种基金Henan Provincial Key Research and Development Program(No.202102210312)Natural Science Foundation of Shandong Province(ZR2020QB197)CAS Key Laboratory of Renewable Energy(No.E129kf0301)Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education of China(KF201902)。
文摘Lignin is the most abundant aromatic polymer in nature,which is rich in a large number of benzene ring structures and active functional groups.The molecular structure of lignin has unique designability and controllability,and is a class of functional materials with great application prospects in energy storage and conversion.Here,this review firstly focuses on the concept,classification,and physicochemical property of lignin.Then,the application research of lignin in the field of electrochemical storage materials and devices are summarized,such as lignin-carbon materials and lignin-carbon composites in supercapacitors and secondary batteries.Finally,this review points out the bottlenecks that need to be solved urgently and the prospects for future research priorities.
基金We are grateful to the National Natural Science Foundation of China(22172040,21974031 and 22204026)the Project Funded by China Postdoctoral Science Foundation(2022M710859)+2 种基金the Department of Science and Techniques of Guangdong Province(2021A1515010180,2019B010933001)Guangzhou Municipal Science and Technology Bureau(202102010449)the Department of Guangdong Provincial Public Security(GZQC20-PZ11-FD084)fortheirfinancial support of thiswork.
文摘The analytical performance of H+-selective solid-contact ion-selective electrodes(SCISEs)based on solid contact polyaniline doped with chloride(PANI(Cl))and poly(3,4-ethylenedioxythiophene)doped with poly(styrene sulfonate)(PEDOT(PSS))was characterized by a developed coulometric signal transduction method.PEDOT(PSS)solid contact is covered by PVC based H+-selective membrane.The obtained coulometric signal demonstrates that the cumulated charge can be amplified by increasing the capacitance of solid contact.SCISEs covered with spin-coated membrane behave faster amperometric response than electrodes with drop-cast mem-brane.In contrast to earlier works,the amperometric response and impedance spectrum demonstrates H+transfer through SCISEs is independent from the thickness of membrane.The exceptional behavior of PANI(Cl)H+-SCISEs shows that the capacitance estimated from impedance spectrum at low frequency 10 mHz and coulometric signal of PANI(Cl)based SCISEs is influenced by the applied po-tentials,whereas PEDOT(PSS)solid contact is independent from the chosen applied potentials.Furthermore,preliminary investiga-tions of coulometric signal transduction on flexible pH sensor implies its potential applications in wearable sensors for sweat ion concentration detection.
基金supported by the National Natural Science Foundation of China(21974032,U2006208,22227804,and 22304034)the Guangdong Basic and Applied Basic Research Foundation(2023B1515020110 and 2023B1515040004)+2 种基金Science and Technology Research Project of Guangzhou(202201000002 and 2023A03J0030)Department of Science&Technology of Guangdong Province(2022A156)Key Discipline of Materials Science and Engineering,Bureau of Education of Guangzhou(20225546)。
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.52071298,and 11771407)the ZhongYuan Science and Technology Innovation Leadership Program(Grant No.214200510010)+2 种基金the China Postdoctoral Science Foundation funded project(Grant No.2019M651600)the Innovative Funds Plan of Henan University of Technol-ogy(Grant No.2020ZKCJ09)the Research Foundation for Advanced Talents of Henan University of Technology(Grant No.2018BS027).
文摘This paper shows hidden information from the plastic deformation of metallic glasses using machine learning.Ni_(62)Nb_(38)(at.%)metallic glass(MG)film and Zr_(64.13)Cu_(15.75)Al_(10)Ni_(10.12)(at.%)BMG,as two model materials,are considered for nano-scratching and compression experiment,respectively.The interconnectedness among variables is probed using correlation analysis.The evolvement mechanism and governing system of plastic deformation are explored by combining dynamical neural networks and sparse identification.The governing system has the same basis function for different experiments,and the coefficient error is≤0.14%under repeated experiments,revealing the intrinsic quality in metallic glasses.Furthermore,the governing system is conducted based on the preceding result to predict the deformation behavior.This shows that the prediction agrees well with the real value for the deformation process.
基金National Natural Science Foundation of China,Grant/Award Numbers:21773103,21802027,91856115Strategic Priority Research Program of the Chinese Academy of Sciences,Grant/Award Number:XDB36000000Ministry of Science and Technology of the People’s Republic of China,Grant/Award Number:2017YFA0206600。
文摘Recently,materials with circularly polarized luminescence(CPL)properties have attracted substantial attention because they offer new perspectives in fundamental research and wide applications in photonics,bio-encoding,catalysis,and so forth.Such importance has recently promoted the development of CPL-active materials from the traditional realm of organics to newly released areas in inorganics.Due to the advantages of inorganic nanomaterials in stability,high luminescent quantum efficiency,material diversity,and the diversity of shapes and sizes,extensive research about CPL active inorganic nanomaterials has been done in the past decades leading to great signs of progress on synthesis,characterizations,and potential applications.In this review,therefore,we will thoroughly describe the general design principles of inorganic nanomaterials with CPL activity,basically according to the origins of chirality in inorganic nanomaterials:intrinsic chirality in inorganic nanomaterials,ligand-induced chirality,and structural chirality caused by the supramolecular assembly,respectively.The representative applications of the CPL-active inorganic nanomaterials are presented with respect to challenges,prospective,and problems that unsolved to date.
基金supported by the National Natural Science Foundation of China (Grant Nos. 51925103, 11771407, 51761135125, and 51671120)the China Postdoctoral Science Foundation (Grant No. 2019M651600)+1 种基金the Research Foundation for Advanced Talents of Henan University of Technology (Grant No. 2018BS027)the 111 Project (Grant No. D16002)
文摘Chaos has been well understood in dynamic system, however, how the chaotic behavior occur in jerky flow in material, is still not clear, and is lack of specific chaotic attractor. Here the jerky evolution of lateral force and the stair-like fluctuation of lateral displacement are observed for Ni62 Nb38(at.%) metallic glass film during nanoscratch process. This jerky flow is investigated by using the largest Lyapunov exponent, Kolmogorov entropy and fractal dimension, and chaotic behavior of lateral force-time and normal displacement-lateral displacement sequences is verified. In addition to time series analysis, it is found that jerk equation can be used to describe the jerky flow of the metallic-glass film during nanoscratch. More importantly, unambiguous chaotic attractor is presented by jerky dynamics using "jerk"-singularities, namely the total change rate of lateral force relative to scratch time. These reveal an inner connection between jerky flow and jerky dynamics in nanoscratch of a metallic-glass film.
