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in creator/contributor: "Melendres, C.A."  
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Laser Raman Spectroscopy in studies of corrosion and electrocatalysis

Description: Laser Raman Spectroscopy (LRS) has become an important tool for the in-situ structural study of electrochemical systems and processes in recent years. Following a brief introduction of the experimental techniques involved in applying LRS to electrochemical systems, we survey the literature for examples of studies in the inhibition of electrode reactions by surface films (e.g., corrosion and passivation phenomena) as well as the acceleration of reactions by electro-sorbates (electrocatalysis). W… more
Date: January 1, 1988
Creator: Melendres, C.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Study of nanophase TiO/sub 2/ grain boundaries by Raman spectroscopy

Description: Raman spectra have been recorded for as-consolidated nanophase TiO/sub 2/ samples with differing grain sizes and on samples annealed in air at a variety of temperatures up to 1273 K. The nanophase samples with the smallest grain size, about 12 nm average diameter, could have 15-30% of their atoms in grain boundaries; nevertheless, the strong Raman-active lines representative of the rutile structure were found to dominate all of the observed spectra, independent of grain size and annealing treat… more
Date: January 1, 1989
Creator: Melendres, C.A.; Narayanasamy, A.; Maroni, V.A. & Siegel, R.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

``In-situ`` infrared spectroscopy of electrode surfaces with a synchrotron source

Description: The objective of this study was to develop and use far infrared spectroscopy with a synchrotron source for the elucidation of structures and interactions at electrode surfaces and interfaces. The authors investigated anodically formed surface films on copper in aqueous solutions and water adsorption on gold and platinum. This document contains graphs of infrared spectra and cyclic voltammograms of the films on copper.
Date: September 1, 1997
Creator: Melendres, C.A.; Bowmaker, G.A.; Leger, J.M.; Beden, B. & Tadjeddine, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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In-situ spectro-electrochemical studies of radionuclide contaminated surface films on metals and the mechanism of their formation and dissolution. 1998 annual progress report

Description: 'The objective of this research program is to gain a fundamental understanding of the structure, composition, and mechanism of formation of radionuclide-containing surface films on metals that are relevant to the problem of decontamination of piping systems and waste storage tanks at DOE nuclear processing facilities. As of May 1998, after about a year and a half of work towards implementing this project, considerable progress has been made in understanding the mechanism and structure of heavy … more
Date: June 1, 1998
Creator: Melendres, C.A. & Mini, S.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Off-specular x-ray scattering studies of the morphology of thin films

Description: We discuss the scattering of x-rays from thin films at a surface or interface decorated with a morphology of islands and how these effects manifest themselves in the specular reflectivity and the diffuse (off-specular) scattering. We show how this technique has been used to study block copolymer films decorated with islands on the surface and the development of electrochemically induced pitting on a Cu electrode in an electrolyte solution.
Date: September 1, 1996
Creator: Sinha, S.K.; Feng, Y.P. & Melendres, C.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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