Large Area Growth of Carbon Nanotubes and their Applications

S. Ravi P. Silva
Nano-Electronics Centre, Advanced Technology Institute, University of Surrey, Guildford GU2 7XH, United Kingdom.
The dawn of the Nanotechnology revolution that is taking place currently, was boosted by the identification of carbon nanotubes and the theoretical work associated with its properties in the early 1990’s. In the area of carbon nanotubes (CNT) this offers great potential for scientist and engineers alike to come up with novel phenomena and highly functional devices. Novel phenomena previously only observed at very low temperatures are now possible with 1D nano-wires, even at room temperature. Yet, currently the nanostructures used to examine these properties are grown at high temperatures in order to produce materials with a well-defined crystal lattice structure.

In this paper, we will review the current state of the art in CNT growth and show methods for the growth of high quality nanostructures at low temperatures, even on substrates held at room temperature. This has significant impact in the production of these nanomaterials, and has opened a whole new set of device concepts as well as processing techniques and applications.

This talk will examine the process steps taken in lowering the substrate growth temperature of carbon nanotubes and nanofibres from the usual 700-1100 ºC, right down to room temperature. We show how the energy is coupled to the nickel catalyst via a chemical vapour deposition (CVD) plasma process [1]. CVD growth offers high precision growth, with controlled positioning, diameter and height of nanostructures. We also introduce a novel laser annealing processes, which produces a high quality catalyst all processed with room temperature held substrates [2].

We will also introduce the use of the CVD growth process to create nanostructured Ni pillars, again on room temperature held substrates over large areas. The process adopted i
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