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Structural-Properties Of Amorphous Hydrogenated Carbon .1. A High-Resolution Neutron-Diffraction Study

Walters, J.K., Honeybone, P.J.R., Huxley, D.W., Newport, Robert J., Howells, W.S. (1994) Structural-Properties Of Amorphous Hydrogenated Carbon .1. A High-Resolution Neutron-Diffraction Study. Physical Review B: Condensed Matter and Materials Physics, 50 (2). pp. 831-838. ISSN 0163-1829. (doi:10.1103/PhysRevB.50.831) (KAR id:15991)

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The structure of samples of amorphous hydrogenated carbon, prepared from acetylene and propane precursors, containing 35 and 32 at.% hydrogen, respectively, was investigated by time-of-flight neutron diffraction in the range 0.2-50 angstrom-1 using the ISIS spallation source. The large dynamic range of the data ensures a real-space resolution sufficient to reveal directly the proportions of sp2 and sp3 hybridized carbon. The results show that, in these hard carbon materials, the carbon-atom sites are predominantly sp2 bonded, and the carbon-carbon single bond:carbon-carbon double bond ratio is about 2.5:1. The detailed information on atomic correlations thus provided is used to discuss current structural models, and in particular the data are used to show that these models require significant modification.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevB.50.831
Additional information: ISI Document Delivery No.: NX637 Times Cited: 41 Cited Reference Count: 31
Subjects: Q Science
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: J.M. Smith
Date Deposited: 12 May 2009 11:29 UTC
Last Modified: 16 Nov 2021 09:53 UTC
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