In situ Raman spectroscopy of lanthanum-strontium-cobaltite thin films

Author(s)
Breucop, Justin Daniel
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Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
Advisor
Yang Shao-Horn.
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Abstract
Raman spectroscopy is used to probe the structural change of Lanthanum Strontium Cobaltite (La1.xSrxCoO 3 -8) thin films across change in composition (0%-60% strontium) and temperature (30*C-520°C). Raman shift peaks were identified and correlated with specific vibrational modes. Results were consistent with relevant data, but no transition to the high spin state was observed above 200°C. Compositions were compared to oxygen catalytic data to investigate success in high temperature electrochemical applications. No structural phase changes were found in the research of this thesis, interesting effects in the surface regime were observed and possible explanations are offered. Future research should focus on resolving the surface regime via altered experimental set up. Keywords: LSC, LCO, Raman, in silu.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2012.
 
Cataloged from PDF version of thesis.
 
Includes bibliographical references (p. 29).
 
Date issued
2012
URI
http://hdl.handle.net/1721.1/76121
Department
Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
Publisher
Massachusetts Institute of Technology
Keywords
Materials Science and Engineering.
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