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A Reverse Monte-Carlo Modeling Study Of Amorphous Hydrogenated Carbon

Walters, J.K., Rigden, Jane S., Newport, Robert J. (1995) A Reverse Monte-Carlo Modeling Study Of Amorphous Hydrogenated Carbon. Physica Scripta, T57 . pp. 137-141. ISSN 0281-1847. (doi:10.1088/0031-8949/1995/T57/024) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:16001)

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Abstract

The results of a Reverse Monte Carlo (RMC) modelling of amorphous hydrogenated carbon (a-C:H) are presented. The RMC method has been implemented with the introduction of maximum co-ordination number and ''triplet'' constraints, whilst fitting both neutron and X-ray diffraction data. The positions of 5000 ''atoms'' in a box, with full periodicity, are altered until the associated model structure factor, S(Q), and pair distribution function, G(r), agree with the analogous experimental data within the errors. Once the data has been fitted, it is possible to generate model partial pair distribution functions (i.e. those associated with C-C, C-H and H-H), bond angle distributions, co-ordination number distributions, etc. X-ray data is used to provide information on the carbon-carbon network, whilst neutrons are also sensitive to the cross-terms involving hydrogen. The fitting of both types of data simultaneously therefore provides sufficient information to generate a viable ''physical'' model for the structure of these materials. The effects of increasing the number density inside the box have also been investigated.

Item Type: Article
DOI/Identification number: 10.1088/0031-8949/1995/T57/024
Subjects: Q Science
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: J.M. Smith
Date Deposited: 07 May 2009 14:06 UTC
Last Modified: 16 Nov 2021 09:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/16001 (The current URI for this page, for reference purposes)

University of Kent Author Information

Newport, Robert J..

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