In-situ infrared monitoring of surface chemistry and free-carrier concentration correlated with voltammetry: germanium, a model electrode
Article Abstract:
In situ infrared spectroscopy experiments confirmed that the peaks in the voltammograms of germanium in acidic electrolyte are due to a back-and forth change between hydrogenated and hydroxylated surfaces. GeH2 species at the hydrogenated surface and GeH species similar to terrace sites, step sites and sterically hindered or buried sites were also identified. The hydrogenation of the surface occurred together with a negative shift of the flatband potential. The shift was a result in a change in surface charge rather than the dipolar change between GeH and GeOH.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Chemistry of HNO3 on Ge(100)
Article Abstract:
Research was conducted to examine the chemistry of HNO3 on Ge(100). The initial bonding geometry and decomposition mechanism of HNO3 on Ge(100) is described. To gain an insight on the details of the complex, a combination of Auger elecrtron spectroscopy, high-resolution electron energy loss spectroscopy an temperature programmed desorption studies were employed. Results indicate that HNO3 adsorbs molecularly at 190 K in a bidentate bonding configuration.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Adsorption and decomposition of H2S in InP(100)
Article Abstract:
Synchrotron radiation and soft X-ray photoelectron spectroscopy are used to investigate the adsorption and thermal reaction of H2S on the InP(100) surface. Results show that the decomposition of H2S yields S, HS and H on the surface at 100 K. The S atom preferentially bonds to the In atom of the surface forming three different S chemical states. The H atom generated by the H2S dissociation bonds to the P atom.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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