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 Title: Adatom Diffusion and Interactions: Pd on W(110) Author(s): Koh, Seong Jin Doctoral Committee Chair(s): Ehrlich, Gert Department / Program: Materials Science and Engineering Discipline: Materials Science and Engineering Degree Granting Institution: University of Illinois at Urbana-Champaign Degree: Ph.D. Genre: Dissertation Subject(s): Engineering, Materials Science Abstract: Three-atom interaction energies have been estimated from the observed linear-to-island transformation of Pd clusters and from the measured interaction energies of Pd pairs. In this, three-atom interaction energies corresponding to two different configurations, linear and triangle, have been obtained for the first time. It has been found that the magnitude of the three-atom interaction energy for the linear configuration, F$\sb{\rm 3,lin}$, is large. The large three-atom interaction energy of the linear configuration is responsible for the observed stability of linear chain structures of small Pd clusters and for the linear-to-island transformation when the size of the cluster increases. This study has shown that many-atom interactions play a crucial role in the cohesion and structure of nuclei in the early stages of crystal growth and hence significantly influence the entire growth process. Issue Date: 1998 Type: Text Language: English Description: 253 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998. URI: http://hdl.handle.net/2142/82901 Other Identifier(s): (MiAaPQ)AAI9834700 Date Available in IDEALS: 2015-09-25 Date Deposited: 1998
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