| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1492663 | Materials Research Bulletin | 2006 | 7 Pages |
Abstract
Iodine and sulfur incorporated amorphous carbon (a-C) films are prepared by vapor phase pyrolysis of carbon rich organic precursor, maleic anhydride. Transmission electron microscopy (TEM) analysis depicts the intercalation induced local structural ordering and evolution of nano-graphitic phases in the sample. An X-ray photoelectron spectroscopy (XPS) study on these samples confirms the presence of intercalates. The study of optical properties of the samples by UV-vis absorption spectrometry accounts for a decrease in optical bandgap and Urbach energy with impurity incorporation and increase in pyrolysis temperature. This refers to induced structural ordering, decrease in disorder and increase in sp2 or Ï-sites in the sample. Electrical conductivity measurement on a-C samples reveals increase in conductivity with pyrolysis temperature induced by iodine and sulfur incorporation.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Latha Kumari, S.V. Subramanyam,