Terrace-dependent nucleation of small Ag clusters on a five-fold icosahedral quasicrystal surface

Journal Article · Sat Jul 21 00:00:00 EDT 2007 · Philosophical Magazine (2003, Print)

DOI:https://doi.org/10.1080/14786430701364960· OSTI ID:963132

Unal, B; Evans, J W; Lograsso, T A; Ross, A R; Jenks, C J; Thiel, P A

Nucleation of Ag islands on the five-fold surface of icosahedral Al-Pd-Mn is influenced strongly by trap sites. Submonolayers of Ag prepared by deposition at 365 K and with a flux of 1 x 10{sup -3} monolayers/s exhibit a variation in Ag island densities across different terraces. Comparisons with previous work and with rate equation analysis indicate that trap sites are not saturated under these experimental conditions and that the difference in island densities is not necessarily due to variation in trap densities. While it could have a number of different origins, our results point to a terrace-dependent value of the effective diffusion barrier for Ag adatoms.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11358
• OSTI ID: 963132
• Report Number(s): IS-J 7230
• Journal Information: Philosophical Magazine (2003, Print), Journal Name: Philosophical Magazine (2003, Print) Journal Issue: 18-21 Vol. 87; ISSN 1478-6435
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
DEPOSITION
DIFFUSION BARRIERS
NUCLEATION