Dendrimer-assisted controlled growth of carbon nanotubes for enhanced thermal interface conductance
Date of this VersionAugust 2007
Nanotechnology 18 (2007) 385303 (4pp)
Birck Nanotechnology Center, School of Mechanical Engineering, Schools of Materials Engineering and Electrical and Computer Engineering, Purdue University
This document has been peer-reviewed.
Multi-walled carbon nanotubes (MWCNTs) with systematically varied diameter distributions and defect densities were reproducibly grown from a modified catalyst structure templated in an amine-terminated fourth-generation poly(amidoamine) (PAMAM) dendrimer by microwave plasma-enhanced chemical vapor deposition. Thermal interface resistances of the vertically oriented MWCNT arrays as determined by a photoacoustic technique reveal a strong correlation with the quality as assessed by Raman spectroscopy. This study contributes not only to the development of an active catalyst via a wet chemical route for structure-controlled MWCNT growth, but also to the development of efficient and low-cost MWCNT-based thermal interface materials with thermal interface resistances 10 mm2 KW?1.