Investigations on diamond films synthesized in combustion flames at atmospheric pressures

K. Solomon Harshavardhan

doi:10.1117/12.22466

1 December 1990 Investigations on diamond films synthesized in combustion flames at atmospheric pressures

K. Solomon Harshavardhan

Proceedings Volume 1325, Diamond Optics III; (1990) https://doi.org/10.1117/12.22466
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Experimental investigations on diamond films prepared in oxyacetylene combustion flames at atmospheric pressures have been carried out by a detailed analysis of laser Raman spectroscopy scanning electron microscopy high resolution electron diffraction x-ray photoelectron spectroscopy and Auger electron spectroscopy. The Raman spectra of the films1deposited on Si (1OO substrates clearly indicate a well defined 1334 cm signature of the sp bonded carbon (diamond). A systematic Raman analysis has been carried out to establish the rnxed nature of the carbon bonding1in these films by 1monitoring the 1334 cm line as wll as the 1350 cm D line and 1580 cm G line both reminescent of the sp bonded graphitic Raman signatures of carbon. The optimum deposition conditions necessary for obtaining a predominant diamond film growth have thus been established. The scanning electron microscopic investigations indicate that the growth morphologies of the films are dominated by and 3ioo3 surfaces. The morphological features have a spatial variation and also exhibit ball''like features along with the well faceted crystallites. The electron diffraction studies establish cubic diamond crystal structure with a lattice parameter of 3. 55 A. The high resolution studies also indicate the presence of other impurity phases the origin of which are attributed to the thermodynamically non-uniform situation at the substrate-gas interface. Core level photo-electron spectroscopic studies carried by monitoring the Si (2p) and C (is) core levels at 98. 1 and 285 eV

Citation Download Citation

K. Solomon Harshavardhan "Investigations on diamond films synthesized in combustion flames at atmospheric pressures", Proc. SPIE 1325, Diamond Optics III, (1 December 1990); https://doi.org/10.1117/12.22466

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