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Clustering in Nanostructured Carbon: Evidence of Electron Delocalization

Carey, JD and Henley, SJ (2007) Clustering in Nanostructured Carbon: Evidence of Electron Delocalization Diamond and Related Materials, 16 (10). 1782 - 1787. ISSN 0925-9635

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Abstract

The electronic properties of disordered carbon based materials can be discussed in terms of the clustering of the sp2 carbon phase and delocalization of the electron wavefunction. In smooth amorphous carbon thin films this results in a mixed phase material of conductive sp2 clusters embedded in an electrically insulating sp3 matrix. The delocalization of the electron wavefunction associated with the sp2 clusters is shown to play an important role in understanding many of the electronic and optical properties of the films. It is demonstrated that the extent of the electron delocalization and clustering can be estimated using magnetic resonance methods. Evidence for delocalization in a range of carbon based materials such as diamond-like carbon thin films produced by chemical vapour deposition, nanostructured carbon produced by pulsed laser ablation and ultrananocrystalline diamond is presented.

Item Type: Article
Additional Information: NOTICE: this is the author’s version of a work that was accepted for publication in Diamond and Related Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Diamond and Related Materials, 16(10), October 2007, DOI http://dx.doi.org/10.1016/j.diamond.2007.07.002.
Uncontrolled Keywords: Clustering, sp2 phase
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute
Depositing User: Symplectic Elements
Date Deposited: 07 Dec 2012 12:41
Last Modified: 28 Nov 2013 14:43
URI: http://epubs.surrey.ac.uk/id/eprint/742123

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