|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||197 Improving the Wettability of Aluminum on Carbon Nanotubes
||Kang Pyo So, Il Ha Lee, Dinh Loc Duong, Tae Hyung Kim, Eun Sun Kim, Dong Hoon Keum, Seong Chu Lim, Kay Hyeok An, Young Hee Lee
|On-Site Speaker (Planned)
||Kang Pyo So
The wetting of a metal on carbon nanotubes is difficult due to the large difference of their surface tensions and is a bottleneck for making metal-carbon nanotube (CNT) composites. Here, we report a simple method to enhance the wettability of metal particles on the CNT surface by applying aluminum, which is the largest surface tension material. This method involves two steps: i) Al nanoparticles are decorated on multiwalled CNTs by electroplating and ii) Al powder is further spread on Al-electroplated CNTs, followed by high temperature annealing to accommodate complete wetting of the aluminum. The large surface tension difference is overcome by forming Al-C covalent bonds initiated by defects of the CNTs. The decrease of the D-band intensity, the G-band shift in the Raman, and the formation of Al-C covalent bonds, as confirmed by x-ray photoelectron spectroscopy, were in agreement with our structural model of CNT-vacancy-O-Al determined by density functional calculations.