IJAT Vol.12 No.1 pp. 29-36
doi: 10.20965/ijat.2018.p0029


High-Yield Bridged Assembly of ssDNA-Modified SWCNT Using Dielectrophoresis

Yusuke Shiomi, Yoshikazu Hirai, Osamu Tabata, and Toshiyuki Tsuchiya

Department of Micro Engineering, Kyoto University
Nishikyo-ku, Kyoto 615-8540, Japan

Corresponding author

June 1, 2017
November 16, 2017
January 5, 2018
single-walled carbon nanotube (SWCNT), single strand DNA modification, dielectrophoresis, electroless gold deposition, back-gate type field effect transistor (FET)

A high-yield, bridged assembly of single-walled carbon nanotubes (SWCNT) was demonstrated using single-strand DNA (ssDNA) modification, dielectrophoresis (DEP), and electroless deposition of gold. ssDNA modification is used for the mono-dispersion of an SWCNT solution for DEP. Gold deposition after DEP was used for the electrical and mechanical clamping of assembled SWCNTs. DEP conditions were investigated, and the best conditions, namely, 2 Vpp, 1 kHz, 1 min for 200-nm gap electrodes, resulted in 8 single-assembly and 19 multiple-assembly SWCNTs between 33 pairs of electrode gaps. The electrical properties of the assembled ssDNA-modified SWCNTs were measured as a back-gate type of FET, and both metallic and semiconducting properties were observed.

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Last updated on Jan. 23, 2018