On March 11,2020,the World Health Organization(WHO)announced that the novel coronavirus(COVID-19)outbreak can be characterized a pandemic.1 Thereafter,we have witnessed the exponential growth of COVID-19 cases globall...On March 11,2020,the World Health Organization(WHO)announced that the novel coronavirus(COVID-19)outbreak can be characterized a pandemic.1 Thereafter,we have witnessed the exponential growth of COVID-19 cases globally over the past few months(Fig.1).展开更多
The crawling process of snakes is known to have fascinating tribological phenomena,whereas investigations on their frictional properties depending on patterned cuticles are insufficient.In this study,we have designed ...The crawling process of snakes is known to have fascinating tribological phenomena,whereas investigations on their frictional properties depending on patterned cuticles are insufficient.In this study,we have designed and fabricated biomimetic microstructures inspired by the geometric microunits of Achalinus spinalis cuticle using polyurethane acrylate(PUA)material and performed its tribological analysis.The micro-morphology of this Achalinus-inspired textured polymer surface(AITPS)is characterized by the closely and evenly quasi-rectangular microgrooves,periodically arranged along certain orientations.We have compared the frictional performance of our fabricated AITPS with other competitive microstructure,using a smooth steel ball and commercial clay as an interacting surface.After performing massive friction tests with steel ball and clay,AITPS still maintains good resistance reduction performed compared to the patterned surface with straight microgrooves,which is most likely due to the reduction of actual contact areas at the frictional interface.展开更多
Polyanion-type cathode materials for lithium ion batteries have attracted much attention recently in view of their stable structures.Here,relatively rarely investigated LiFeTiO_(4)and its composite with carbon nanotub...Polyanion-type cathode materials for lithium ion batteries have attracted much attention recently in view of their stable structures.Here,relatively rarely investigated LiFeTiO_(4)and its composite with carbon nanotubes(CNTs)have been synthesized via solid-state reactions.Their structures,chemical compositions and morphologies are characterized using various techniques.展开更多
文摘On March 11,2020,the World Health Organization(WHO)announced that the novel coronavirus(COVID-19)outbreak can be characterized a pandemic.1 Thereafter,we have witnessed the exponential growth of COVID-19 cases globally over the past few months(Fig.1).
基金supported by the National Natural Science Foundation of China(No.52075249)the foundation of Jiangsu Provincial Key Laboratory of Bionic Functional Materials,China.The authors thank Xipeng WANG and Tingwei HUO in Nanjing University of Aeronautics and Astronautics,China,for help in the AFM and LEXT experiments.
文摘The crawling process of snakes is known to have fascinating tribological phenomena,whereas investigations on their frictional properties depending on patterned cuticles are insufficient.In this study,we have designed and fabricated biomimetic microstructures inspired by the geometric microunits of Achalinus spinalis cuticle using polyurethane acrylate(PUA)material and performed its tribological analysis.The micro-morphology of this Achalinus-inspired textured polymer surface(AITPS)is characterized by the closely and evenly quasi-rectangular microgrooves,periodically arranged along certain orientations.We have compared the frictional performance of our fabricated AITPS with other competitive microstructure,using a smooth steel ball and commercial clay as an interacting surface.After performing massive friction tests with steel ball and clay,AITPS still maintains good resistance reduction performed compared to the patterned surface with straight microgrooves,which is most likely due to the reduction of actual contact areas at the frictional interface.
基金financial support from the NSF of China(21673203 and 21771159)the Natural Science Foundation of Yangzhou(YZ2016122),the Priority Academic Program Development of Jiangsu Higher Education Institutions and Top-notch Academic Programs Project of Jiangsu Higher Education Institutions.
文摘Polyanion-type cathode materials for lithium ion batteries have attracted much attention recently in view of their stable structures.Here,relatively rarely investigated LiFeTiO_(4)and its composite with carbon nanotubes(CNTs)have been synthesized via solid-state reactions.Their structures,chemical compositions and morphologies are characterized using various techniques.
