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Effect of Nanoscale Surface Texture on the Contact-pressure-dependent Conduction Characteristics of a Carbon-nanotube Thin-film Tactile Pressure Sensor

Title
Effect of Nanoscale Surface Texture on the Contact-pressure-dependent Conduction Characteristics of a Carbon-nanotube Thin-film Tactile Pressure Sensor
Author
이승백
Keywords
Carbon nanotube; Tactile sensor; Pressure sensor; STRAIN; FABRICATION
Issue Date
2011-01
Publisher
KOREAN PHYSICAL SOC, 635-4, YUKSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREA
Citation
THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY, Vol.58 No.1 [2011], 72-76(5쪽)
Abstract
We report on a novel tactile pressure sensor structure that transfers the vertical pressure applied to the sample's surface to lateral strain in the carbon-nanotube thin film embedded in an elastomer by using a "wavy" structured substrate contact surface. When pressure was applied to the poly(dimethylsiloxane) (PDMS) surface, it was transferred to a carbon-nanotube thin film (CNTF) underneath, where it stretched to conform to the wavy substrate surface. This resulted in an elongation, or lateral strain, in the CNTF layer, their reducing its conductance. The measurements showed that with an applied vertical pressure of 30 kPa, a 15% reduction in conductance was achieved with only a 500-nm deflection in the CNTF, and repeatedly applied pressures for 3,600 cycles (12 hours) resulted in only a 2% reduction in sensitivity, demonstrating the their film's high sensitivity and reliability. The mechanical stability and high sensitivity of the CNTF/PDMS hybrid with wavy substrate structures may make possible applications to future tactile pressure sensors.
URI
http://www.jkps.or.kr/journal/view.html?volume=58&number=1&spage=72&year=2011
ISSN
0374-4884; 3744-4884
DOI
10.3938/jkps.58.72
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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