Characterization of diamond films by Raman spectroscopy
Tóm tắt
As the technology for diamond film preparation by plasma-assisted CVD and related procedures has advanced, Raman spectroscopy has emerged as one of the principal characterization tools for diamond materials. Cubic diamond has a single Raman-active first order phonon mode at the center of the Brillouin zone. The presence of sharp Raman lines allows cubic diamond to be recognized against a background of graphitic carbon and also to characterize the graphitic carbon. Small shifts in the band wavenumber have been related to the stress state of deposited films. The effect is most noticeable in diamond films deposited on hard substrates such as alumina or carbides. The Raman line width varies with mode of preparation of the diamond and has been related to 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.
Từ khóa
Tài liệu tham khảo
Solin, 1973, Proc. 5th Internat. Conf. on Amorphous and Liquid Semiconductors, 1259
Trueb, 1969, Amer. Mineral., 54, 412
Trueb, 1972, Amer. Mineral., 57, 1664
Woollam, 1985, Appl. Phys. Comm., 5, 263
Koster, 1957, Solid State Physics
Wyckoff, 1963, Crystal Structures, 1, 26
Matsumoto, 1986, Archiwum Naukio Materialach, 7, 179
5 Piano L. S. and Adar F. , Proc. SPIE 822 (1987).
Derjaguin, 1977, Growth of Diamond and Graphite from the Gas Phase
Hanfland, 1986, Physica, 139/140 B, 516
Berry, 1962, Geol. Soc. Amer. Mem., 85, 23
Lax, 1974, Symmetry Principles in Solid State and Molecular Physics