TY - JOUR
T1 - High-resolution electroluminescent imaging of pressure distribution using a piezoelectric nanowire LED array
AU - Pan, Caofeng
AU - Dong, Lin
AU - Zhu, Guang
AU - Niu, Simiao
AU - Yu, Ruomeng
AU - Yang, Qing
AU - Liu, Ying
AU - Wang, Zhong Lin
N1 - Funding Information:
This research was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering (award no. DE-FG02-07ER46394), the National Science Foundation and the Knowledge Innovation Program of the Chinese Academy of Sciences (KJCX2-YW-M13). The authors thank Yushen Zhou and Sihong Wang for cleanroom work.
PY - 2013/9
Y1 - 2013/9
N2 - Emulation of the sensation of touch through high-resolution electronic means could become important in future generations of robotics and human-machine interfaces. Here, we demonstrate that a nanowire light-emitting diode-based pressure sensor array can map two-dimensional distributions of strain with an unprecedented spatial resolution of 2.7 μm, corresponding to a pixel density of 6,350 dpi. Each pixel is composed of a single n-ZnO nanowire/p-GaN light-emitting diode, the emission intensity of which depends on the local strain owing to the piezo-phototronic effect. A pressure map can be created by reading out, in parallel, the electroluminescent signal from all of the pixels with a time resolution of 90 ms. The device may represent a major step towards the digital imaging of mechanical signals by optical means, with potential applications in artificial skin, touchpad technology, personalized signatures, bio-imaging and optical microelectromechanical systems.
AB - Emulation of the sensation of touch through high-resolution electronic means could become important in future generations of robotics and human-machine interfaces. Here, we demonstrate that a nanowire light-emitting diode-based pressure sensor array can map two-dimensional distributions of strain with an unprecedented spatial resolution of 2.7 μm, corresponding to a pixel density of 6,350 dpi. Each pixel is composed of a single n-ZnO nanowire/p-GaN light-emitting diode, the emission intensity of which depends on the local strain owing to the piezo-phototronic effect. A pressure map can be created by reading out, in parallel, the electroluminescent signal from all of the pixels with a time resolution of 90 ms. The device may represent a major step towards the digital imaging of mechanical signals by optical means, with potential applications in artificial skin, touchpad technology, personalized signatures, bio-imaging and optical microelectromechanical systems.
UR - http://www.scopus.com/inward/record.url?scp=84883465457&partnerID=8YFLogxK
U2 - 10.1038/nphoton.2013.191
DO - 10.1038/nphoton.2013.191
M3 - Article
AN - SCOPUS:84883465457
SN - 1749-4885
VL - 7
SP - 752
EP - 758
JO - Nature Photonics
JF - Nature Photonics
IS - 9
ER -