Efficient synthesis of individual single-walled carbon nanotube by water-based catalyst with poly(vinylpyrrolidone).
Individual single-walled carbon nanotubes (SWCNTs) were synthesized on the patterned water-soluble catalyst by thermal chemical vapor deposition. The individual SWCNTs were obtained by introducing polyvinylpyrrolidone (PVP) as a dispersant. The number of SWCNTs between two electrodes were approximately 1-2 with an average diameter of about 1.7 nm and a yield of forming electrodes of nearly 70%. The PVP played an important role in dispersing catalysts and suppressing the active sites to limit the number of SWCNTs during synthesis, which is a critical condition for fabrication of field effect transistors (FETs). The measured I-V characteristics of the over layer-deposited electrodes revealed a clear gating effect in large portion, in good agreement with Raman observations in several excitation energies. The patterning procedure, catalyst preparation, and growth condition for fabrication of the SWCNT-FET were further discussed.
Jeong
Seung Yol
SY
Department of Physics, Institute of Basic Science, Sungkyunkwan University Suwon 440-746, Republic of Korea.
Jeon
Sang Hyun
SH
Han
Gang Hee
GH
An
Kay Hyeok
KH
Bae
Dong Jae
DJ
Lim
Seuong Chu
SC
Hwang
Ha Ryong
HR
Han
Chang Soo
CS
Yun
Minhee
M
Lee
Young Hee
YH