The growth and structure of Pd films on Zn(O0001) were investigated using high resolution electron energy loss spectroscopy, x-ray photoelectron spectroscopy, and low energy electron diffraction. Vapor deposited Pd films at 300 K were found to follow a two-dimensional (2D) island growth mode, in which 2D metal islands are formed up to a critical coverage at which point growth occurs primarily in a layer-by-layer fashion on top of the islands. Heating to only 350 K was found to be sufficient to

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... nduce partial agglomeration of Pd films into three-dimensional particles. In addition to causing further agglomeration into particles, heating to 700 K resulted in partial reduction of the ZnO surface and the formation of a PdZn alloy. The growth and structure of Pd films on ZnO͑0001͒ were investigated using high resolution electron energy loss spectroscopy, x-ray photoelectron spectroscopy, and low energy electron diffraction. Vapor deposited Pd films at 300 K were found to follow a two-dimensional ͑2D͒ island growth mode, in which 2D metal islands are formed up to a critical coverage at which point growth occurs primarily in a layer-by-layer fashion on top of the islands. Heating to only 350 K was found to be sufficient to induce partial agglomeration of Pd films into three-dimensional particles. In addition to causing further agglomeration into particles, heating to 700 K resulted in partial reduction of the ZnO surface and the formation of a PdZn alloy. Downloaded 23 Jun 2011 to 130.91.117.41. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions 164713-2 P. Bera and J. M. Vohs J. Chem. Phys. 125, 164713 ͑2006͒ Downloaded 23 Jun 2011 to 130.91.117.41. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions 164713-4 P. Bera and J. M. Vohs J. Chem. Phys. 125, 164713 ͑2006͒ Downloaded 23 Jun 2011 to 130.91.117.41. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions 164713-6 P. Bera and J. M. Vohs J. Chem. Phys. 125, 164713 ͑2006͒ Downloaded 23 Jun 2011 to 130.91.117.41. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions