Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes
Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes
复制标题
DOI：
10.1038/nnano.2011.184
复制
发表时间：
2011-12-01
影响因子：
38.3
通讯作者：
Bao, Zhenan
中科院分区：
文献类型：
--
作者：
Lipomi, Darren J.;Vosgueritchian, Michael;Bao, Zhenan
透明的弹性导体是电子和光电设备的重要组成部分，有助于人类互动和生物反馈，例如交互式电子设备（1），植入式医疗设备（2）和具有类似人类传感能力的机器人系统（3）。具有这些特性的导电薄膜的可用性可能导致开发类似皮肤的传感器（4），其可逆地拉伸，感测压力，（不仅仅是触摸），弯曲成发夹形，与可折叠、可伸展和机械坚固的显示器（5）和太阳能电池（6）集成，并且还缠绕在非平面和生物（7-9）表面，例如皮肤（10）和器官（11），不打喷嚏。我们报告透明的，导电的单壁碳纳米管的喷雾沉积膜，可以通过施加应变沿沿着每个轴，然后释放这种应变呈现可拉伸。该过程在纳米管中产生弹簧状结构，其可容纳高达150%的应变，并在拉伸状态下表现出高达2，200 S cm（-1）的电导率。我们还将纳米管薄膜用作透明、可拉伸电容器阵列中的电极，这些电容器可用作压力和应变传感器。
Transparent, elastic conductors are essential components of electronic and optoelectronic devices that facilitate human interaction and biofeedback, such as interactive electronics(1), implantable medical devices(2) and robotic systems with human-like sensing capabilities(3). The availability of conducting thin films with these properties could lead to the development of skin-like sensors(4) that stretch reversibly, sense pressure (not just touch), bend into hairpin turns, integrate with collapsible, stretchable and mechanically robust displays(5) and solar cells(6), and also wrap around non-planar and biological(7-9) surfaces such as skin(10) and organs(11), without wrinkling. We report transparent, conducting spray-deposited films of single-walled carbon nanotubes that can be rendered stretchable by applying strain along each axis, and then releasing this strain. This process produces spring-like structures in the nanotubes that accommodate strains of up to 150% and demonstrate conductivities as high as 2,200 S cm(-1) in the stretched state. We also use the nanotube films as electrodes in arrays of transparent, stretchable capacitors, which behave as pressure and strain sensors.