A flexible and highly sensitive strain-gauge sensor using reversible interlocking of nanofibres

作者：Pang, Changhyun^*; Lee, Gil-Yong; Kim, Tae-il; Kim, Sang Moon; Kim, Hong Nam; Ahn, Sung-Hoon; Suh, Kahp-Yang

来源：Nature Materials, 2012, 11(9): 795-801.

DOI：10.1038/NMAT3380

• FIELD-EFFECT TRANSISTORS
• ARTIFICIAL SKIN
• LARGE-AREA
• PRESSURE
• MATRIX
• ELECTRONICS
• CIRCUITS
• FILMS
• STRESS
• LAYERS

Flexible skin-attachable strain-gauge sensors are an essential component in the development of artificial systems that can mimic the complex characteristics of the human skin. In general, such sensors contain a number of circuits or complex layered matrix arrays. Here, we present a simple architecture for a flexible and highly sensitive strain sensor that enables the detection of pressure, shear and torsion. The device is based on two interlocked arrays of high-aspect-ratio Pt-coated polymeric nanofibres that are supported on thin polydimethylsiloxane layers. When different sensing stimuli are applied, the degree of interconnection and the electrical resistance of the sensor changes in a reversible, directional manner with specific, discernible strain-gauge factors. The sensor response is highly repeatable and reproducible up to 10,000 cycles with excellent on/off switching behaviour. We show that the sensor can be used to monitor signals ranging from human heartbeats to the impact of a bouncing water droplet on a superhydrophobic surface.

• 出版日期2012-9