基于高黏附可拉伸高分子材料的人机交互界面

随着柔性电子技术和人工智能的蓬勃发展,将柔性传感器与人工智能、大数据和5G通讯有机结合,能够构建以人为中心的智能人机交互系统,在智能健康监测和生物医疗等领域发挥越来越重要的作用.作为连接人体信号与网络空间的人机交互界面,皮肤电极的力学性能直接影响监测信号的灵敏度和稳定性.从材料的角度出发,如何同时实现电极的可拉伸性和高黏附性,让其稳定地贴敷于皮肤表面,成为皮肤电极进一步应用亟待解决的科学难题和技术挑战.本文综合评述了近年来高黏附可拉伸高分子材料的研究进展及在人机交互界面的各种应用,并展望了下一代智能人机交互界面的发展趋势.

High-resolution flexible electronic devices by electrohydrodynamic jet printing:From materials toward applications

High-resolution flexible electronic devices are widely used in the fields of soft robotics,smart human-machine interaction,and intelligent e-healthcare monitoring due to their mechanical flexibility,ductility,and compactness.The electrohydrodynamic jet printing(e-jet printing)technique is used for constructing high-resolution and cross-scale flexible electronic devices such as field-effect transistors(FETs),flexible sensors,and flexible displays.As a result,researchers are paying close attention to e-jet printing flexible electronic devices.In this review,we focused on the latest advancements in high-resolution flexible electronics made by e-jet printing technology,including various materials used in e-jet printing inks,the process control of e-jet printing,and their applications.First,we summarized various functional ink materials available for e-jet printing,including organic,inorganic,and hybrid materials.Then,the interface controlling the progress of e-jet printing was discussed in detail,including the physical and chemical properties of the functional ink,the interfacial wettability between the ink and substrate,and the microdroplet injection behavior in a high-voltage field.Additionally,various applications of e-jet printing in the fields of flexible electrodes,FETs,flexible sensors,and flexible displays were demonstrated.Finally,the future problems and potential associated with the development of next generation e-jet printing technology for flexible electronic devices were also presented.

高拉伸高迁移率半导体纳米纤维共混薄膜应用于完全可拉伸有机晶体管

可拉伸有机场效应晶体管(OFETs)是有机集成电路和可穿戴生物传感器的基本组成部分.可拉伸有机半导体是实现高迁移率可拉伸OFETs的核心材料.目前实现高迁移率高拉伸聚合物半导体仍面临挑战.在此,我们通过混合聚合物半导体和弹性体,制备了高迁移率可拉伸的半导体共混薄膜.通过纳米限域效应,聚合物形成独特的纳米纤维.半导体薄膜具有低结晶度和高聚集度,因此该纤维共混薄膜具有高迁移率和高拉伸性.我们制备的完全可拉伸的有机晶体管在0%和100%应变下空穴迁移率分别为2.74和2.53 m^(2)V^(-1)s^(-1).即使在150%应变下,可拉伸晶体管的迁移率也高达1.57 cm^(2)V^(-1)s^(-1).可拉伸晶体管在30%应变下的1000个拉伸/释放周期中表现出了高的机械鲁棒性.