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DIRECT OBSERVATION OF COMPOSITIONALLY HOMOGENEOUS A-C-H BAND-GAP-MODULATED SUPERLATTICES

DAVIS, CA, SILVA, SRP, DUNINBORKOWSKI, RE, AMARATUNGA, GAJ, KNOWLES, KM and STOBBS, WM (1995) DIRECT OBSERVATION OF COMPOSITIONALLY HOMOGENEOUS A-C-H BAND-GAP-MODULATED SUPERLATTICES PHYSICAL REVIEW LETTERS, 75 (23). 4258 - 4261. ISSN 0031-9007

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Abstract

It is shown that amorphous hydrogenated carbon (a-C: H) band-gap-modulated superlattices can be observed by transmission electron microscopy. The layering proves to be well defined and it is demonstrated that changes in the band gap from 1.5 to 2.8 eV cannot be associated with ordered graphitic regions, in that crystalline regions larger than 0.5 nm are not observed. Differences in the amount of π bonding are found to lead to changes in the average atomic scattering factor. It is suggested that the changes in π bonding are associated with changes in local ordering that control the band gap.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, DIAMOND-LIKE CARBON, AMORPHOUS-CARBON, THIN-FILMS
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Depositing User: Melanie Hughes
Date Deposited: 28 Sep 2010 09:29
Last Modified: 23 Sep 2013 18:38
URI: http://epubs.surrey.ac.uk/id/eprint/2368

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