Title :
High performance dielectric film using SiO>sub>2-coated short carbon nanotubes in BaTiO3-polymer composite
Author :
Bae, M.J. ; Kim, J.-Y. ; Park, Sang Ho ; Jeong, Tak ; Song, Seunghyun ; Lee, Jeyull ; Han, Il-Yong ; Jung, D. ; Yoo, J.B. ; Liu, Cong ; Yu, Son-Cheol
Author_Institution :
Mater. Res. Center, Samsung Electron., Yongin, South Korea
Abstract :
Three-phase composite films consisting of BaTiO3/singlewalled carbon nanotube (SWCNT)/polymer were fabricated. The SWCNTs were shortened and coated with SiO2 to minimise the conducting paths of the SWCNTs in the film. The film showed a dielectric constant and dielectric loss of 92 and 0.031, respectively, at a frequency of 1 kHz. The SiO2-coated short SWCNTs can play important roles in enhancing the capacitance by space charge polarisation at the interface between the SWCNTs and SiO2, and reducing the dielectric loss.
Keywords :
barium compounds; carbon nanotubes; dielectric losses; dielectric thin films; filled polymers; nanocomposites; permittivity; SiO2-C; dielectric constant; dielectric film; dielectric loss; frequency 1 kHz; polymer composite; short carbon nanotubes; space charge polarisation; three-phase composite films;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.3396
