Structure and diffusion of Pd clusters on the W(1 1 0) surface

Tsu Yi Fu*, Yi Ju Hwang, T. T. Tsong


研究成果: 雜誌貢獻期刊論文同行評審

15 引文 斯高帕斯(Scopus)


Fundamental to an atomistic understanding of many surface phenomena is how atoms and small atomic clusters behave on the surface and what energies are involved in various atomic processes. Using the field ion microscope, we have measured diffusion parameters of small Pd clusters with two to nine Pd atoms on the W(110) surface. The average activation energy of the center of mass diffusion increases with the number of Pd atoms in the clusters. From the probability of observing different atomic configurations during diffusion, possible cluster diffusion mechanisms are probed. A small Pd cluster can form either a one-dimensional (1D) linear-chain or a two-dimensional island-like structure. The stability of linear chains remains until the number of atoms reaches eight. From the probability of observing different structures approaching thermal equilibrium, we discuss the importance of many body effects in the adatom-adatom interaction.

頁(從 - 到)143-148
期刊Applied Surface Science
出版狀態已發佈 - 2003 10月 15

ASJC Scopus subject areas

  • 一般化學
  • 凝聚態物理學
  • 一般物理與天文學
  • 表面和介面
  • 表面、塗料和薄膜


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