Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 106, Issue 35, Pages 14768-14772Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0901986106
Keywords
electrochemistry; nanomaterials
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Funding
- Royal Society Wolfson Merit Award
- Research Council, United Kingdom via a Basic Technology Grant
- Engineering and Physical Sciences Research Council [GR/S27764/01, EP/C006763/1, EP/C520572/1] Funding Source: researchfish
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Electrodeposition is a widely used materials-deposition technology with a number of unique features, in particular, the efficient use of starting materials, conformal, and directed coating. The properties of the solvent medium for electrodeposition are critical to the technique's applicability. Supercritical fluids are unique solvents which give a wide range of advantages for chemistry in general, and materials processing in particular. However, a widely applicable approach to electrodeposition from supercritical fluids has not yet been developed. We present here a method that allows electrodeposition of a range of metals from supercritical carbon dioxide, using acetonitrile as a co-solvent and supercritical difluoromethane. This method is based on a careful selection of reagent and supporting electrolyte. There are no obvious barriers preventing this method being applied to deposit a range of materials from many different supercritical fluids. We present the deposition of 3-nm diameter nanowires in mesoporous silica templates using this methodology.
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