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Applied Science and Convergence Technology 2009; 18(4): 281-287

Published online July 1, 2009

Copyright © The Korean Vacuum Society.

X-Ray Photoelectron Spectroscopy Studies of Pd Supported MgO/Mg

Wei Sheng Tai,Hyun Ook Seo,Kwang Dae Kim,,Young Dok Kim

Abstract

Pd was deposited on magnesium-oxide-covered magnesium ribon substrate by metal thermal evaporation method in high vacuum. The electronic and chemical properties of Pd samples with different coverages were studied using in-situ X-ray Photoelctron Spectroscopy (XPS) and Field Emission Scanning Electron Microscopy (SEM). For relatively lower amounts of Pd deposited(< 1㎚), separate Pd particles could be observed, whereas at higher Pd coverages, Pd thin films caused by agglomeration of Pd nanoparticles was found. The metal support interaction with Pd-support was observed. The Pd atoms on the metal oxide/metal interface were partially negative charged by charge transfer.

Keywords: Pd 나노입자,MgO,열기화증착법,X-선광전자분광법,금속과 기판의 상호작용,Pd nanoparticle,Thermal evaporation,X-ray photoelectron spectroscopy,Metal suport interaction

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