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  pH sensitivity of gallium arsenide (GaAs) electrodes functionalized with methyl−mercaptobiphenyl monolayers

Gassull, D., Luber, S. M., Ulman, A., Grunze, M., Tornow, M., Abstreiter, G., et al. (2007). pH sensitivity of gallium arsenide (GaAs) electrodes functionalized with methyl−mercaptobiphenyl monolayers. The Journal of Physical Chemistry C, 111(33), 12414-12419. doi:10.1021/jp072952y.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0001-A3D9-2 Version Permalink: https://hdl.handle.net/21.11116/0000-000A-1275-E
Genre: Journal Article

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JPhysChemC _111_2007_12414.pdf (Any fulltext), 94KB
 
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JPhysChemC _111_2007_12414_Suppl.pdf (Supplementary material), 26KB
 
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https://pubs.acs.org/doi/pdf/10.1021/jp072952y (Any fulltext)
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 Creators:
Gassull, Daniel, Author
Luber, Sebastian M., Author
Ulman, Abraham, Author
Grunze, Michael1, Author           
Tornow, Marc, Author
Abstreiter, Gerhard, Author
Tanaka, Motomu, Author
Affiliations:
1Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society, ou_2364731              

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 Abstract: GaAs electrodes coated with hydrophobic, methyl−mercaptobiphenyl (CH3−MBP) monolayers exhibited an excellent electrochemical stability. We found that the interface resistance of the chemically functionalized GaAs shows linear relationships with electrolyte pH and bias potential in a reproducible manner. The impedance spectra measured in a wide frequency range ( f  = 100 kHz to 50 mHz) are analyzed with several equivalent circuit models in a quantitative manner, and the pH sensitivity extrapolated from two linear relationships (35 mV pH-1) can be attributed to the absorption of the OH- ions on the hydrophobic surface.

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Language(s): eng - English
 Dates: 2007-04-162007-06-052007-07-28
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/jp072952y
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Title: The Journal of Physical Chemistry C
  Abbreviation : J. Phys. Chem. C
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 111 (33) Sequence Number: - Start / End Page: 12414 - 12419 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766