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A graphene force sensor with pressure-amplifying structure

Title
A graphene force sensor with pressure-amplifying structure
Author
이승백
Keywords
LARGE-AREA; ARTIFICIAL SKIN; STRAIN SENSORS; FILMS; MATRIX; LAYERS
Issue Date
2014-07
Publisher
Elsevier B.V
Citation
Carbon, November 2014, 78, P.601-608
Abstract
We present a sensor of vertical forces based on single-layer graphene, with a working range that corresponds to the pressure of a gentle touch that can be perceived by humans. Polydimethylsiloxane (PDMS) is employed for the supporting material of the graphene layer and also works as a force absorber of the sensor. In spite of the low gauge factor that arises from the intrinsic electromechanical character of single-layer graphene, we achieve a resistance variation of about 17±7% in response to an applied vertical pressure of 10kPa by introducing a pressure-amplifying structure of patterned lines that induces additional structural deformation of the graphene layer for the applied vertical force. In addition, we demonstrate a method to enhance the sensitivity of the sensor by applying resistive single-layer graphene.
URI
https://www.sciencedirect.com/science/article/pii/S0008622314006897?via%3Dihub
ISSN
0008-6223
DOI
10.1016/j.carbon.2014.07.051
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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