| 초록 |
The development electronic skin which can realize the sensing capabilities of human skin have recently attracted great attentions in many applications. We introduce several different types of piezoresistive films as electronic skins with high sensitivity and multiplex sensing capability. The key strategy in the design of piezoresistive films is the use of contact resistance between micro/nanostructured films with mated geometry. We explored microstructured conductive composite films based on carbon nanotube and silicon elastomers. This design allows ultrasensitive monitoring of resistance variations under small pressure loadings due to combined effects of contact area change and the percolation networks between CNT conductive fillers. The piezoresistive properties have been utilized for the detection of pressure, shear, and bending stresses. In addition, we present piezoresistive films based on vertically grown ZnO nanowire arrays for an extreme sensitivity and dynamic signal range. |
