title: Enhancement of heating performance of carbon nanotube sheet with granular metal.
abstract: A strategy for enhancing the heating performance of freestanding carbon nanotube (CNT) sheet is presented that involves decorating the sheet with granular-type palladium (Pd) particles. When Pd is added to the sheet, the heating efficiency of CNT sheet is increased by a factor of 3.6 (99.9 °C cm(2)/W vs 27.3 °C cm(2)/W with no Pd). Suppression of convective heat transfer loss attributes to the enhanced heat generation efficiency. However, higher heating response of CNT/Pd sheet was observed compared to CNT sheet, hence suggesting that the electron-lattice energy exchange could be additional heating mechanism in the presence of granular-type particles of Pd having a diameter of 10 nm or less. CNT sheet/Pd is quite stable, retaining its initial characteristics even after 300 cycles of on-off voltage pulses and shows fast thermal responses of the heating and cooling rates being 154 and -248 °C/s, respectively.
authors.affiliation: School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Hyeongwook
authors.initials: H
authors.lastname: Im
authors.forename: Eui Yun
authors.initials: EY
authors.lastname: Jang
authors.forename: Ajeong
authors.initials: A
authors.lastname: Choi
authors.forename: Wal Jun
authors.initials: WJ
authors.lastname: Kim
authors.forename: Tae June
authors.initials: TJ
authors.lastname: Kang
authors.forename: Yung Woo
authors.initials: YW
authors.lastname: Park
authors.forename: Yong Hyup
authors.initials: YH
authors.lastname: Kim