Dislocations,which are topological line defects within a crystal lattice,play a dominant role in crystal plasticity and thus affect various mechanical,electronic,magnetic and optical properties of crystals.These dislo...Dislocations,which are topological line defects within a crystal lattice,play a dominant role in crystal plasticity and thus affect various mechanical,electronic,magnetic and optical properties of crystals.These dislocations also play a crucial role in the structural hardening and material processing[1].In general,mechanical stress is believed to be the fundamental driving force for the movement of dislocations in a crystal.展开更多
Human–machine interfaces (HMIs) enable the intuitive cognition and interaction between users and devices [1–3]. The conventional HMIs such as mouse, keyboard and touchscreen have significantly simplified the manipul...Human–machine interfaces (HMIs) enable the intuitive cognition and interaction between users and devices [1–3]. The conventional HMIs such as mouse, keyboard and touchscreen have significantly simplified the manipulations of computers and associated devices, while they suffer from bulk, big footprint and mechanical noncompliance for applications in virtual/augmented reality and Internet of Things, and more importantly, difficulties in operation for people with disabilities such as dexterity impairments or neurological conditions [4,5].展开更多
基金supported by the National Natural Science Foundation of China(12072325,52125205,U20A20166,and 52192614)the National Key R&D Program of China(2019YFA0706802,2021YFB3200304,and 2021YFB3200302)+3 种基金the 111 project(D18023)the Natural Science Foundation of Beijing Municipality(Z180011 and 2222088)Shenzhen Science and Technology Program(KQTD20170810105439418)the Fundamental Research Funds for the Central Universities。
文摘压力传感器是人工触觉感应的基石.尽管人们对高性能压力传感器进行了广泛的研究,但解决传感器的高灵敏度、宽线性响应范围和宽工作温度范围仍然面临巨大挑战.在此,我们创新性地应用三乙胺实现了疏水聚酰亚胺纤维(PIFs)在碳纳米管(CNT)水溶液中的均匀分散,同时纤维的结构不会受到破坏,并利用冻干和热酰亚胺化技术制备了强健超弹的蜘蛛网状(PIF/CNT)导电复合气凝胶.该气凝胶作为压力传感器具有宽线性感应范围(0.01-53.34 kPa)、超低检测限(10 Pa)、高灵敏度(0.507 kPa^(-1))、快速响应/恢复时间(85/80 ms)、稳定的快速压缩响应(500 mm min^(-1))和优异的抗循环疲劳能力(5000次)等优异的传感性能.有限元分析表明,多级纤维网络有利于相邻的导电纤维之间的接触面积在外部压力下有明显的线性变化,使之表现出优异的线性传感性能.该传感器可用于人体生理和运动信号检测、电子皮肤和智能控制,且在极端温度(-100-300℃)下表现出出色的传感稳定性和热绝缘性,可用于极端太空环境下太空服和月球/火星栖息地充气结构的传感单元.本工作为开发下一代线性压力传感器提供了一个简单有效的方法.
基金supported by the National Natural Science Foundation of China(61875136,62275170,52002246,52372154,and U22A2077)the Guangdong Provincial Science Fund for Distinguished Young Scholars(2022B1515020054)+1 种基金Hong Kong Research Grant Council(RFS2021-1S05)Scientific Research Foundation as Phase II Construction of High-level University for the Youth Scholars of Shenzhen University 2019(000002110223)。
文摘Dislocations,which are topological line defects within a crystal lattice,play a dominant role in crystal plasticity and thus affect various mechanical,electronic,magnetic and optical properties of crystals.These dislocations also play a crucial role in the structural hardening and material processing[1].In general,mechanical stress is believed to be the fundamental driving force for the movement of dislocations in a crystal.
基金the support from the National Natural Science Foundation of China (52125205, U20A20166,U22A2077, 52192614, and 52002246)Natural Science Foundation of Beijing Municipality (Z180011 and 2222088)+4 种基金the Shenzhen Fundamental Research Project (JCYJ20190808170601664)the Shenzhen Science and Technology Program (KQTD20170810105439418)the Science and Technology Innovation Project of Shenzhen Excellent Talents (RCBS20200714114919006)National Key R&D Program of China (2021YFB3200302 and 2021YFB3200304)the Fundamental Research Funds for the Central Universities。
文摘Human–machine interfaces (HMIs) enable the intuitive cognition and interaction between users and devices [1–3]. The conventional HMIs such as mouse, keyboard and touchscreen have significantly simplified the manipulations of computers and associated devices, while they suffer from bulk, big footprint and mechanical noncompliance for applications in virtual/augmented reality and Internet of Things, and more importantly, difficulties in operation for people with disabilities such as dexterity impairments or neurological conditions [4,5].
