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http://dx.doi.org/10.5757/JKVS.2009.18.4.281

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

Tai, Wei-Sheng (Department of chemistry, Sungkyunkwan University)
Seo, Hyun-Ook (Department of chemistry, Sungkyunkwan University)
Kim, Kwang-Dae (Department of chemistry, Sungkyunkwan University)
Kim, Young-Dok (Department of chemistry, Sungkyunkwan University)
Publication Information
Journal of the Korean Vacuum Society / v.18, no.4, 2009 , pp. 281-287 More about this Journal
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(< 1nm), 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 nanoparticle; MgO; Thermal evaporation; X-ray photoelectron spectroscopy; Metal suport interaction;
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