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Nanomaterials 2015, 5(4), 2007-2018; doi:10.3390/nano5042007

Nanostructuring of Palladium with Low-Temperature Helium Plasma

Department of Nuclear, Plasma and Radiological Engineering, Center for Plasma Material Interactions, University Illinois at Urbana-Champaign, Urbana 61801, IL, USA
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Author to whom correspondence should be addressed.
Academic Editors: Krasimir Vasilev and Thomas Nann
Received: 13 October 2015 / Revised: 12 November 2015 / Accepted: 20 November 2015 / Published: 25 November 2015
(This article belongs to the Special Issue Plasma Nanoengineering and Nanofabrication)
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Abstract

Impingement of high fluxes of helium ions upon metals at elevated temperatures has given rise to the growth of nanostructured layers on the surface of several metals, such as tungsten and molybdenum. These nanostructured layers grow from the bulk material and have greatly increased surface area over that of a not nanostructured surface. They are also superior to deposited nanostructures due to a lack of worries over adhesion and differences in material properties. Several palladium samples of varying thickness were biased and exposed to a helium helicon plasma. The nanostructures were characterized as a function of the thickness of the palladium layer and of temperature. Bubbles of ~100 nm in diameter appear to be integral to the nanostructuring process. Nanostructured palladium is also shown to have better catalytic activity than not nanostructured palladium. View Full-Text
Keywords: palladium; nanotendrils; helium bubbles; catalysis palladium; nanotendrils; helium bubbles; catalysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fiflis, P.; Christenson, M.; Connolly, N.; Ruzic, D. Nanostructuring of Palladium with Low-Temperature Helium Plasma. Nanomaterials 2015, 5, 2007-2018.

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