A highly sensitive pressure sensor using a double-layered graphene structure for tactile sensing

Title
A highly sensitive pressure sensor using a double-layered graphene structure for tactile sensing
Authors
박완준
Keywords
25TH ANNIVERSARY ARTICLE; ELECTRONIC SKIN; ARTIFICIAL SKIN; DESIGN
Issue Date
2015-07
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v. 7, NO 27, Page. 11652-11659
Abstract
In this paper, we propose a graphene sensor using two separated single-layered graphenes on a flexible substrate for use as a pressure sensor, such as for soft electronics. The working pressure corresponds to the range in which human perception recognizes surface morphologies. A specific design of the sensor structure drives the piezoresistive character due to the contact resistance between two graphene layers and the electromechanical properties of graphene itself. Accordingly, sensitivity in resistance change is given by two modes for low pressure (-0.24 kPa(-1)) and high pressure (0.039 kPa(-1)) with a crossover pressure (700 Pa). This sensor can detect infinitesimal pressure as low as 0.3 Pa with uniformly applied vertical force. With the attachment of the artificial fingerprint structure (AFPS) on the sensor, the detection ability for both the locally generated shear force and actual human touch confirms recognition of the surface morphology constructed by periodic structures.
URI
http://pubs.rsc.org/-/content/articlehtml/2015/nr/c5nr00076ahttp://hdl.handle.net/20.500.11754/26009
ISSN
2040-3364; 2040-3372
DOI
http://dx.doi.org/10.1039/c5nr00076a
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > DEPARTMENT OF ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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