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Structure and reactivity of Bi allotropes on the fivefold icosahedral Al-Pd-Mn quasicrystal surface

TitleStructure and reactivity of Bi allotropes on the fivefold icosahedral Al-Pd-Mn quasicrystal surface
Publication TypeJournal Article
Year of Publication2010
AuthorsSmerdon JA, Cross N, Dhanak VR, Sharma HR, Young KM, Lograsso TA, Ross AR, McGrath R
Journal TitleJournal of Physics-Condensed Matter
Volume22
Pages345002
Date Published09/01
ISBN Number0953-8984
Accession NumberISI:000280847200004
Keywords10-fold surface, adsorption, bismuth, C-60, growth, stm, thin-films
Abstract

The growth of Bi on a pseudomorphic Bi monolayer on the fivefold surface of the icosahedral Al-Pd-Mn quasicrystal has been investigated using low energy electron diffraction and scanning tunnelling microscopy. Initially randomly oriented pseudocubic islands are formed with a preference for an even number of layers. Subsequently a morphological transformation takes place to hexagonal Bi islands, which align along high symmetry directions of the substrate. The Bi flux is found to have a strong effect on which island structure is preferred. When C-60 is adsorbed on the three different allotropes of Bi present in this system, hexagonal C-60 islands are formed in each case. On the pseudocubic and hexagonal islands, the C-60 islands are aligned with the substrate. We discuss the energetic, kinetic and geometrical factors which influence the morphological transformation referred to above.
URL<Go to ISI>://000280847200004
DOI10.1088/0953-8984/22/34/345002