Nanostructuring of Palladium with Low-Temperature Helium Plasma

Nanomaterials

P. Fiflis¹  M.P. Christenson²  N. Connolly²  D.N. Ruzic²  Krasimir Vasilev² 

[1] Department of Nuclear, Plasma and Radiological Engineering, Center for Plasma Material Interactions, University Illinois at Urbana-Champaign, Urbana 61801, IL, USA;

关键词: palladium;    nanotendrils;    helium bubbles;    catalysis;   

DOI  :  10.3390/nano5042007

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.