Ultraviolet and visible Raman analysis of thin a-C films grown by filtered cathodic arc deposition

Wasyluk, Joanna; Perova, Tatiana S.; Lau, D. W. M.; Taylor, Matthew; McCulloch, D. G.; Stopford, Jennifer

doi:10.1016/j.diamond.2010.01.019

Cited by 11 publications

(3 citation statements)

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“…1, [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][87][88][89][90] The D band is a breathing mode of A 1g symmetry, and its intensity is strictly related to the occurrence of six-fold aromatic rings in the scattering medium. Table I) which reduces aromatic ring formation.…”

Section: Visible Raman and Pl Spectroscopies: Sp 2 Clusteringmentioning

confidence: 99%

“…By correct interpretation of the different parameters derived from the spectral analysis from curve fitting of MW Raman 35,[54][55][56][57][58][59][60][61][62][63][64][65][66][67][68] and PL 38-40,69-73 spectra, we report that it is possible to distinguish between DLC:H films with minute differences in bonding configuration, microstructure, and hydrogen content and to follow their thermally induced structural evolution. Most importantly, we introduce a new analysis method of Raman spectra that permits distinguishing between films prepared with different density, thickness, and RTA treatment.…”

Section: Introductionmentioning

confidence: 99%

“…The objective of the present paper is to demonstrate that it is possible to completely characterize the structural properties of as-deposited and post-annealed DLC:H films and to resolve the structural differences between different types of films by using multi-wavelength (MW) Raman spectroscopy 35,[54][55][56][57][58][59][60][61][62][63][64][65][66][67][68] and photoluminescence (PL) spectroscopy. [38][39][40][69][70][71][72][73] During data analysis, the key to achieve a complete and comprehensive structural characterization is (a) to take account of both the structural and topological disorder of the amorphous network, (b) be aware that the evolution of the sp 2 and sp 3 phases can in principle be independent, (c) that this evolution depends on the treatment of the film post-deposition, and finally (d) that sp 2 clusters possess locally different band gaps that are more or less resonant with different Raman laser wavelengths.…”

Section: Introductionmentioning

confidence: 99%

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Complete characterization by Raman spectroscopy of the structural properties of thin hydrogenated diamond-like carbon films exposed to rapid thermal annealing

Rose

Wang

Smith

et al. 2014

Journal of Applied Physics

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Gold nanoparticle formation in diamond-like carbon using two different methods: Gold ion implantation and codeposition of gold and carbon J. Appl. Phys. 112, 074312 (2012) We have demonstrated that multi-wavelength Raman and photoluminescence spectroscopies are sufficient to completely characterize the structural properties of ultra-thin hydrogenated diamondlike carbon (DLC:H) films subjected to rapid thermal annealing (RTA, 1 s up to 659 C) and to resolve the structural differences between films grown by plasma-enhanced chemical vapor deposition, facing target sputtering and filtered cathodic vacuum arc with minute variations in values of mass density, hydrogen content, and sp 3 fraction. In order to distinguish unequivocally between films prepared with different density, thickness, and RTA treatment, a new method for analysis of Raman spectra was invented. This newly developed analysis method consisted of plotting the position of the Raman G band of carbon versus its full width at half maximum. Moreover, we studied the passivation of non-radiative recombination centers during RTA by performing measurements of the increase in photoluminescence in conjunction with the analysis of DLC:H networks simulated by molecular dynamics. The results show that dangling bond passivation is primarily a consequence of thermally-induced sp 2 clustering rather than hydrogen diffusion in the film. V C 2014 AIP Publishing LLC. [http://dx

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