Ahmad Umair, Tehseen Z. Raza, Hassan Raza
We report a systematic method to calculate the in-plane crystal size of pyrolytic carbon by using Raman spectroscopy. The characterized film was synthesized on nickel substrate by decomposing methane in a chemical vapor deposition furnace at 1000 {\deg}C, followed by ultra-fast cooling that is crucial for obtaining a uniform film. The Raman peaks at ~1354 cm-1 and ~1584 cm-1 wavenumbers are used to extract the D and G bands. The corresponding peak intensities are then used in an excitation energy dependent equation to calculate the in-plane crystal size. Using Raman area mapping, we report the mean value and standard deviation of in-plane crystal size over an area of 100 {\mu}m x 100 {\mu}m.
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http://arxiv.org/abs/1303.6364
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