Applied Science and Convergence Technology 2009; 18(4): 281-287
Published online July 1, 2009
Copyright © The Korean Vacuum Society.
Wei Sheng Tai,Hyun Ook Seo,Kwang Dae Kim,,Young Dok Kim
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