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Advanced Materials

Controlling the Morphology of Carbon Nanotube Films by Varying the Areal Density of Catalyst Nanoclusters Using Block-Copolymer Micellar Thin Films

Authors


  • Facilities of the MIT Institute of Soldier Nanotechnologies (ISN), Center for Material Science and Engineering (CMSE), and Microsystems Technology Laboratories (MTL) were used extensively in this work. This work was supported by the MIT ISN (Project 3.17, Contract DaAD19-02D-0002), and NSF grant DMI-0521985. A. J. Hart is grateful for the support of a Fannie and John Hertz Foundation Fellowship.

Abstract

The morphologies of carbon nanotube (CNT) thin films are controlled by varying the areal density of catalytic nanoclusters synthesized from a block-copolymer micellar thin film. The morphologies of the CNT films vary from a tangled and sparse arrangement of individual CNTs, through a transition region with locally bunched and self-aligned CNTs, to a rapid growth of thick vertical CNT films (see figure).

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