Papers by erick goncalves
Applied Surface Science, 2007
Reticulated vitreous carbon (RVC) was obtained from different heat treatment temperature (HTT), i... more Reticulated vitreous carbon (RVC) was obtained from different heat treatment temperature (HTT), in the range from 700 up to 2000°C, and used as a substrate for polyaniline growth from electrosynthesis. The influence of HTT on RVC chemical surface was studied by X-ray photoelectron spectroscopy (XPS) and correlated to electrochemical parameters used in the electrosynthesis. XPS analyses have shown that RVC
Applied Surface Science, 2007
The graphitization index provided by X-ray diffraction (XRD) and Raman spectrometry for reticulat... more The graphitization index provided by X-ray diffraction (XRD) and Raman spectrometry for reticulated vitreous carbon (RVC) substrates, carbonized at different heat treatment temperatures (HTT), is investigated. A systematic study of the dependence between the disorder-induced D and G Raman bands is presented. The crystallite size L a was obtained for both X-ray diffraction and Raman spectrometry techniques. Particularly, the validity for L a determination, from Raman spectra, is pointed out comparing the commonly used formula based on peaks amplitude ratio (I D /I G) and the recent proposed equation that uses the integrated intensities of D and G bands. The results discrepancy is discussed taken into account the strong contribution of the line broadening presented in carbon materials heat treated below 2000 8C.
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Papers by erick goncalves