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Most Cited Journal Articles 1999-Materials Science

Following is a CAS database record representing a highly cited journal article.

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CAPLUS COPYRIGHT 2002 ACS

TITLE:	Characterization of diamond films by Raman spectroscopy
AUTHOR(S):	Knight, Diane S.; White, William B.
CORPORATE SOURCE:	Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, 16802, USA
SOURCE:	J. Mater. Res. (1989), 4(2), 385-93 CODEN: JMREEE; ISSN: 0884-2914
PUBLISHER:	Materials Research Society
LANGUAGE:	English

ABSTRACT:
As the technol. for diamond film prepn. by plasma-assisted CVD and related procedures has advanced, Raman spectroscopy has emerged as a principal characterization tool. Cubic diamond has a single Raman-active 1st-order phonon mode at the center of the Brillouin zone. The presence of sharp Raman lines enables the recognition of cubic diamond against a background of graphitic C and also enables the characterization of the graphitic C. Small shifts in the band wave no. are related to the stress state of deposited films. The effect is most noticeable in diamond films deposited on hard substrates such as Al2O3 or carbides. The Raman line width varies with the mode of prepn. of the diamond and is related to the degree of structural order. The Raman spectrum of hexagonal diamond (lonsdaleite) is distinct from that of the cubic diamond and allows it to be recognized.