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Point Defect Model Description of the Formation of Anodic Gold Oxide in H2SO4 Solution.

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Title: Point Defect Model Description of the Formation of Anodic Gold Oxide in H2SO4 Solution.
Authors: Ghelichkhah, Zahed1, Ferguson, Gregory S.1 gf03@lehigh.edu, Macdonald, Digby D.2 macdonald@berkeley.edu, Asl, Samin Sharifi-2
Source: Journal of The Electrochemical Society. Apr2021, Vol. 168 Issue 4, p1-24. 24p.
Subjects: Point defects, Oxides, Gold, Refractive index, Product management software
Abstract: An impedance-based Point Defect Model (PDM) was developed for the potentiostatic, anodic formation of gold oxide at potentials of 1.40–1.70 V vs SHE in H2SO4 (0.1 M and 0.5 M). Film thickness and refractive indices were determined at each oxide formation potential using spectroscopic ellipsometry. The thickness of the oxide increases linearly with increasing potential. Mott-Schottky analysis shows that the oxide exhibits both n-type and p-type character and the dominant defect density is calculated to be in the order of 1021−1022 (1 cm−3). The PDM was optimized upon experimental EIS data to extract values for model parameters and accounts well for the experimental observations in both the steady-state time and frequency domains. [ABSTRACT FROM AUTHOR]
Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 150654496
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  Data: Point Defect Model Description of the Formation of Anodic Gold Oxide in H<subscript>2</subscript>SO<subscript>4</subscript> Solution.
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  Data: <searchLink fieldCode="AR" term="%22Ghelichkhah%2C+Zahed%22">Ghelichkhah, Zahed</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ferguson%2C+Gregory+S%2E%22">Ferguson, Gregory S.</searchLink><relatesTo>1</relatesTo><i> gf03@lehigh.edu</i><br /><searchLink fieldCode="AR" term="%22Macdonald%2C+Digby+D%2E%22">Macdonald, Digby D.</searchLink><relatesTo>2</relatesTo><i> macdonald@berkeley.edu</i><br /><searchLink fieldCode="AR" term="%22Asl%2C+Samin+Sharifi-%22">Asl, Samin Sharifi-</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+The+Electrochemical+Society%22">Journal of The Electrochemical Society</searchLink>. Apr2021, Vol. 168 Issue 4, p1-24. 24p.
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  Data: <searchLink fieldCode="DE" term="%22Point+defects%22">Point defects</searchLink><br /><searchLink fieldCode="DE" term="%22Oxides%22">Oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Gold%22">Gold</searchLink><br /><searchLink fieldCode="DE" term="%22Refractive+index%22">Refractive index</searchLink><br /><searchLink fieldCode="DE" term="%22Product+management+software%22">Product management software</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: An impedance-based Point Defect Model (PDM) was developed for the potentiostatic, anodic formation of gold oxide at potentials of 1.40–1.70 V vs SHE in H2SO4 (0.1 M and 0.5 M). Film thickness and refractive indices were determined at each oxide formation potential using spectroscopic ellipsometry. The thickness of the oxide increases linearly with increasing potential. Mott-Schottky analysis shows that the oxide exhibits both n-type and p-type character and the dominant defect density is calculated to be in the order of 1021−1022 (1 cm−3). The PDM was optimized upon experimental EIS data to extract values for model parameters and accounts well for the experimental observations in both the steady-state time and frequency domains. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1149/1945-7111/abf409
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      – Code: eng
        Text: English
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        PageCount: 24
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      – SubjectFull: Point defects
        Type: general
      – SubjectFull: Oxides
        Type: general
      – SubjectFull: Gold
        Type: general
      – SubjectFull: Refractive index
        Type: general
      – SubjectFull: Product management software
        Type: general
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      – TitleFull: Point Defect Model Description of the Formation of Anodic Gold Oxide in H2SO4 Solution.
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            NameFull: Ferguson, Gregory S.
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            NameFull: Macdonald, Digby D.
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            NameFull: Asl, Samin Sharifi-
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            – D: 01
              M: 04
              Text: Apr2021
              Type: published
              Y: 2021
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