Gas-induced restructuring of palladium model catalysts studied with atomic force microscopy

Erlandsson, Ragnar (author): Linköpings universitet,Kemiska och optiska sensorsystem,Tekniska fakulteten

Eriksson, Mats, 1963- (author): Linköpings universitet,Kemiska och optiska sensorsystem,Tekniska fakulteten,Tillämpad Fysik

Olsson, Lars (author): Linköpings universitet,Institutionen för medicin och hälsa

Helmersson, Ulf (author): Linköpings universitet,Plasma och ytbeläggningsfysik,Tekniska fakulteten

Lundström, Ingemar (author): Linköpings universitet,Biosensorer och bioelektronik,Tekniska fakulteten,Tillämpad Fysik

Petersson, Lars-Gunnar (author)

(creator_code:org_t)

American Vacuum Society, 1991
1991
English.
In: Journal of Vacuum Science & Technology B. - : American Vacuum Society. - 1071-1023 .- 1520-8567. ; 9:2, s. 825-828

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

The structure of thin Pd films evaporated onto planar SiO2 substrates changes dramatically during oxygen/hydrogen exposures in ultrahigh vacuum. In this work we have used an atomic force microscope(AFM), operated in the attractive mode, to obtain the three‐dimensional morphology of the Pd surface for different film thicknesses and treatments, and compared the data with transmission electron microscopy(TEM) micrographs. During restructuring, a 100‐Å film changes from being a smooth continuous film with cracks into metal clusters dispersed on the SiO2 support. In the 5‐Å case the metal films are already well dispersed as fabricated. Here the gas exposure instead results in a clustering effect resulting in larger particles. The AFM gives results which are consistent with TEM micrographs but also gives additional information on metal particle shape which can lead to a further understanding of the restructuring process.

By the author/editor: Erlandsson, Ragn ...; Eriksson, Mats, ...; Olsson, Lars; Helmersson, Ulf; Lundström, Ingem ...; Petersson, Lars- ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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