Nanometer-scale electrochemical patterning of LiMn2O4 surfaces by an atomic force microscope operating in air

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Electrochemical nanometer-scale patterning of the surface of a conducting lithium manganese oxide (LiMn{sub 2}O{sub 4}) by scanning probe microscopy (SPM) was studied. The ability to produce nanometer-size patterns of chemically modified oxide or nanometer-sized alterations of the oxide morphology is demonstrated and discussed with reference to possible mechanisms. It is demonstrated that unlike the SPM-based surface oxidation of metals and semiconductors, the LiMn{sub 2}O{sub 4} surface is altered via electrochemically generated species. We show that a localized surface chemical change can be confined to a depth which depends on the oxide-tip voltage difference and ambient humidity. In situ Raman microscopy ... continued below

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7 pages

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Kostecki, Robert; Bonhomme, Frederic; Servant, Laurent; Argoul, Francoise & McLarnon, Frank June 22, 2001.

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Description

Electrochemical nanometer-scale patterning of the surface of a conducting lithium manganese oxide (LiMn{sub 2}O{sub 4}) by scanning probe microscopy (SPM) was studied. The ability to produce nanometer-size patterns of chemically modified oxide or nanometer-sized alterations of the oxide morphology is demonstrated and discussed with reference to possible mechanisms. It is demonstrated that unlike the SPM-based surface oxidation of metals and semiconductors, the LiMn{sub 2}O{sub 4} surface is altered via electrochemically generated species. We show that a localized surface chemical change can be confined to a depth which depends on the oxide-tip voltage difference and ambient humidity. In situ Raman microscopy measurements of localized electrochemical reaction products suggest complex mechanisms of processes induced at the LiMn{sub 2}O{sub 4} surface, such as delithiation through Li-proton exchange and disproportionation of LiMn{sub 2}O{sub 4} to MnO{sub 2} and soluble Mn{sup 2+} species.

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7 pages

Notes

OSTI as DE00834263

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  • Other Information: PBD: 22 Jun 2001

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  • Report No.: LBNL--48360
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/834263 | External Link
  • Office of Scientific & Technical Information Report Number: 834263
  • Archival Resource Key: ark:/67531/metadc777145

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Office of Scientific & Technical Information Technical Reports

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  • June 22, 2001

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • July 26, 2016, 3:23 p.m.

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Kostecki, Robert; Bonhomme, Frederic; Servant, Laurent; Argoul, Francoise & McLarnon, Frank. Nanometer-scale electrochemical patterning of LiMn2O4 surfaces by an atomic force microscope operating in air, report, June 22, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc777145/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.