Mercury vapor sorption and amalgamation with a thin gold film

Hou, Tingting, Chen, Miao, Greene, George W. and Horn, Roger G. 2015, Mercury vapor sorption and amalgamation with a thin gold film, ACS applied materials & interfaces, vol. 7, no. 41, pp. 23172-23181, doi: 10.1021/acsami.5b07002.

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Title Mercury vapor sorption and amalgamation with a thin gold film
Author(s) Hou, Tingting
Chen, Miao
Greene, George W.ORCID iD for Greene, George W.
Horn, Roger G.
Journal name ACS applied materials & interfaces
Volume number 7
Issue number 41
Start page 23172
End page 23181
Total pages 10
Publisher American Chemical Society
Place of publication Bethesda, M.D.
Publication date 2015
ISSN 1944-8252
Keyword(s) Thin gold film
Amalgamation mechanism
Mercury sensor
Mercury sorption
Science & Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Science & Technology - Other Topics
Materials Science
Summary Understanding the amalgamation mechanisms between mercury and gold is of fundamental interest and importance to many mercury sensing applications. However, there is only limited and piecemeal discussion in the literature of the mechanisms by which Au-Hg amalgams are formed on thin Au films. Here, we present a comprehensive description of a series of morphological changes occurring in a thin polycrystalline Au film during Au-Hg amalgamation investigated by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and atomic force microscopy (AFM). These microscopic investigations enable us to offer a coherent explanation for the features and the mechanisms of amalgamation of Hg with Au in the film. We also use an optical technique (fringes of equal chromatic order, FECO) to observe changes in optical thickness and reflectivity of the film. Amalgamation reactions in the film render it inhomogeneous, thus making optical techniques unsuitable as a method for quantitative monitoring of Hg vapor using Au films of this type.
Language eng
DOI 10.1021/acsami.5b07002
Field of Research 0904 Chemical Engineering
0303 Macromolecular And Materials Chemistry
0306 Physical Chemistry (Incl. Structural)
030603 Colloid and Surface Chemistry
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, American Physiological Society
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