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Investigation by surface enhanced Raman spectroscopy of the effect of oxygen or hydrogen plasmas on the surface chemistry of adsorbate-covered gold island films. / Hesse, E.; Creighton, J.A.

In: Langmuir, Vol. 15, No. 10, 1999, p. 3545-3550.

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@article{d215831f4f6043abac8dfeddabd29d17,
title = "Investigation by surface enhanced Raman spectroscopy of the effect of oxygen or hydrogen plasmas on the surface chemistry of adsorbate-covered gold island films",
abstract = "The effects of radio-frequency-excited oxygen and hydrogen plasmas on gold island films with adsorbed CN-, thiophenate, or p-nitrobenzoate ions have been investigated by surface-enhanced Raman spectroscopy (SERS). An oxygen plasma caused oxidation of adsorbed CN- to Au(CN)4-, and there was evidence of oxidation of the adsorption site gold atoms at the Au/p-nitrobenzoate surface, while in a hydrogen plasma Au(CN)4- was reduced back to adsorbed CN-. No adsorbed oxidation or reduction products of thiophenate or p-nitrobenzoate were detected, however. Exposure of gold films to an oxygen or hydrogen plasma also caused partial removal of the adsorbates, though with some loss of SERS activity, and in a hydrogen plasma thiophenate was preferentially removed from a gold film with coadsorbed thiophenate and CN-. On silver films, hydrogen plasma treatment almost completely removed adsorbed CN- with only a small loss of SERS activity, but in an oxygen plasma the films were rapidly destroyed.",
author = "E. Hesse and J.A. Creighton",
note = "Original article can be found at: http://pubs.acs.org/loi/langd5 Copyright American Chemical Society. DOI: 10.1021/la9813578 [Full text of this article is not available in the UHRA]",
year = "1999",
doi = "10.1021/la9813578",
language = "English",
volume = "15",
pages = "3545--3550",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "10",

}

RIS

TY - JOUR

T1 - Investigation by surface enhanced Raman spectroscopy of the effect of oxygen or hydrogen plasmas on the surface chemistry of adsorbate-covered gold island films

AU - Hesse, E.

AU - Creighton, J.A.

N1 - Original article can be found at: http://pubs.acs.org/loi/langd5 Copyright American Chemical Society. DOI: 10.1021/la9813578 [Full text of this article is not available in the UHRA]

PY - 1999

Y1 - 1999

N2 - The effects of radio-frequency-excited oxygen and hydrogen plasmas on gold island films with adsorbed CN-, thiophenate, or p-nitrobenzoate ions have been investigated by surface-enhanced Raman spectroscopy (SERS). An oxygen plasma caused oxidation of adsorbed CN- to Au(CN)4-, and there was evidence of oxidation of the adsorption site gold atoms at the Au/p-nitrobenzoate surface, while in a hydrogen plasma Au(CN)4- was reduced back to adsorbed CN-. No adsorbed oxidation or reduction products of thiophenate or p-nitrobenzoate were detected, however. Exposure of gold films to an oxygen or hydrogen plasma also caused partial removal of the adsorbates, though with some loss of SERS activity, and in a hydrogen plasma thiophenate was preferentially removed from a gold film with coadsorbed thiophenate and CN-. On silver films, hydrogen plasma treatment almost completely removed adsorbed CN- with only a small loss of SERS activity, but in an oxygen plasma the films were rapidly destroyed.

AB - The effects of radio-frequency-excited oxygen and hydrogen plasmas on gold island films with adsorbed CN-, thiophenate, or p-nitrobenzoate ions have been investigated by surface-enhanced Raman spectroscopy (SERS). An oxygen plasma caused oxidation of adsorbed CN- to Au(CN)4-, and there was evidence of oxidation of the adsorption site gold atoms at the Au/p-nitrobenzoate surface, while in a hydrogen plasma Au(CN)4- was reduced back to adsorbed CN-. No adsorbed oxidation or reduction products of thiophenate or p-nitrobenzoate were detected, however. Exposure of gold films to an oxygen or hydrogen plasma also caused partial removal of the adsorbates, though with some loss of SERS activity, and in a hydrogen plasma thiophenate was preferentially removed from a gold film with coadsorbed thiophenate and CN-. On silver films, hydrogen plasma treatment almost completely removed adsorbed CN- with only a small loss of SERS activity, but in an oxygen plasma the films were rapidly destroyed.

U2 - 10.1021/la9813578

DO - 10.1021/la9813578

M3 - Article

VL - 15

SP - 3545

EP - 3550

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 10

ER -