Deformable single wall carbon nanotube electrode for transparent tactile touch screen

Author

Kim, Kunsu ; Shin, Koichi ; Han, Jae-Ho ; Lee, K.-R. ; Kim, Won-Ho ; Park, K.-B. ; Ju, B.-K. ; Pak, James Jungho

Author_Institution

Korea Electron. Technol. Inst., Seongnam, South Korea

Volume

47

Issue

2

fYear

2011

fDate

1/1/2011 12:00:00 AM

Firstpage

118

Lastpage

120

Abstract

With a patterned transparent electrode and compressive-elastic gel material, a multi-input transparent touch screen, which detects touch location and touch force, has been realised. The input device of this touch screen is composed of a flexible upper single wall carbon nanotube electrode (SWCNT), a lower indium tin oxide electrode layer, and a silicone gel layer between two electrodes. When a touch force ranging from 0 N to 5 N was applied to the surface of the upper electrode film, the silicone gel was compressed to change the distance between the two electrodes, which resulted in a capacitance change ranging from 1.92 to 3.42 pF. The SWCNT electrode on the polyethylene terephthalate showed sufficient flexibility and robustness for mechanical deformation.

Keywords

carbon nanotubes; deformation; electrodes; indium compounds; polymer gels; tactile sensors; touch sensitive screens; SWCNT; compressive-elastic gel material; deformable single wall carbon nanotube electrode; flexible upper single wall carbon nanotube electrode; indium tin oxide electrode layer; mechanical deformation; multiinput transparent touch screen; patterned transparent electrode; polyethylene terephthalate; silicone gel layer; touch force; touch location; transparent tactile touch screen; upper electrode film;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2010.2717

Filename

5700008