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Carbon nanotubes on nanoporous alumina: from surface mats to conformal pore filling
Jinghua Fang1, Igor Levchenko2, Zhao Jun Han3
1Plasma Nanoscience Laboratories, Manufacturing Flagship, CSIRO, P.O. Box 218, Lindfield, NSW 2070, Australia ; School of Physics, University of Melbourne, Parkville, VIC 3010, Australia.
Abstract:
Control over nucleation and growth of multi-walled carbon nanotubes in the nanochannels of porous alumina membranes by several combinations of posttreatments, namely exposing the membrane top surface to atmospheric plasma jet and application of standard S1813 photoresist as an additional carbon precursor, is demonstrated. The nanotubes grown after plasma treatment nucleated inside the channels and did not form fibrous mats on the surface. Thus, the nanotube growth mode can be controlled by surface treatment and application of additional precursor, and complex nanotube-based structures can be produced for various applications. A plausible mechanism of nanotube nucleation and growth in the channels is proposed, based on the estimated depth of ion flux penetration into the channels.
Pacs:
63.22.Np Layered systems; 68. Surfaces and interfaces; Thin films and nanosystems (structure and non-electronic properties); 81.07.-b Nanoscale materials and structures: fabrication and characterization.
