期刊
ACS NANO
卷 9, 期 3, 页码 3143-3150出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b00072
关键词
all-optical devices; dynamic pressure sensors; piezo-phototronics; photoluminescence; smart skin
类别
资金
- NSFC [51472056, 51402064]
- Beijing Municipal NSF [7132121]
- thousands talents program for pioneer researcher and his innovation team, China
- Recruitment Program of Global Youth Experts, China
A high-resolution dynamic tactile/pressure display is indispensable to the comprehensive perception of force/mechanical stimulations such as electronic skin, biomechanical imaging/analysis, or personalized signatures. Here, we present a dynamic pressure sensor array based on pressure/strain tuned photoluminescence imaging without the need for electricity. Each sensor is a nanopillar that consists of InGaN/GaN multiple quantum wells. Its photoluminescence intensity can be modulated dramatically and linearly by small strain (0-0.15%) owing to the piezo-phototronic effect. The sensor array has a high pixel density of 6350 dpi and exceptional small standard deviation of photoluminescence. High-quality tactile/pressure sensing distribution can be real-time recorded by parallel photoluminescence,imaging without any cross-talk. The sensor array can be inexpensively fabricated over large areas by semiconductor product lines. The proposed dynamic all-optical pressure imaging with excellent resolution, high sensitivity, good uniformity, and ultrafast response time offers a electromechanical systems.
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