TEM studies of stress relaxation in catalytic Au-Pd core-shell nanoparticles

H. Kumarakuru, D. Cherns, M. G. Montes de Oca, D. J. Fermin

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

3 Citations (Scopus)

Abstract

Transmission electron microscopy and diffraction are used to measure the lattice strain in catalytic Au-Pd core-shell nanoparticles. In order to simplify analysis, single nanoparticles were oriented to achieve strong two-beam diffracting conditions from the nanoparticle centre, such that diffraction was sensitive to the strain parallel to the Au-Pd interface. Corresponding selected area diffraction patterns were used to measure the in-plane strain as a function of the Pd thickness, which is shown to follow the equilibrium (Matthews) theory. These results suggest that, contrary to expectation, strain is not an important factor accounting for the difference in catalytic activity between nanoparticles and thin films. The significance of these results is discussed.

Original languageEnglish
Title of host publicationELECTRON MICROSCOPY AND ANALYSIS GROUP CONFERENCE 2011 (EMAG 2011)
Place of PublicationBRISTOL
PublisherDeutsche Physikalische Gesellschaft & IOP Publishing Ltd
Pages-
Number of pages4
ISBN (Print)*****************
DOIs
Publication statusPublished - 2012
EventConference on Electron-Microscopy-and-Analysis-Group (EMAG) - Birmingham
Duration: 6 Sep 20119 Sep 2011

Conference

ConferenceConference on Electron-Microscopy-and-Analysis-Group (EMAG)
CityBirmingham
Period6/09/119/09/11

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