Nanostructuring of palladium with low-temperature helium plasma

P. Fiflis, M. P. Christenson, N. Connolly, D. N. Ruzic

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)2007-2018
Number of pages12
JournalNanomaterials
Volume5
Issue number4
DOIs
StatePublished - Nov 25 2015

Keywords

  • Catalysis
  • Helium bubbles
  • Nanotendrils
  • Palladium

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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