Open AccessSIMULATION ON MULTIPLE CLUSTER GROWTH IN ULTRA-THIN FILMS
Author(s) -
Xiaoping Wang,
Zhao Te-Xiu,
Feifei Wu,
Gang Liu,
Ziqin Wang
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.1412
Subject(s) - nucleation , fractal , cluster (spacecraft) , fractal dimension , cluster size , materials science , branching (polymer chemistry) , growth rate , power law , diffusion limited aggregation , chemical physics , thin film , diffusion , nonlinear system , statistical physics , condensed matter physics , nanotechnology , thermodynamics , physics , mathematics , statistics , computer science , composite material , mathematical analysis , quantum mechanics , geometry , programming language , electronic structure
The multiple cluster growth with fractal or compact morphology in ultra-thin films has been simulated with various permitted diffustion steps. It is shown that the fractal dimension increases with increasing cluster size in the fractal growth. The nucleation rate decreases with increasing diffusion steps and drops rapidly with increasing deposition time. The cluster size S can be described by a power law as S-(t-t0)κ, where (t-t0) is the growth time. The growth index κ is slightly smaller than 1 given by the classical nucleation and growth theory, due to the branching effect between clusters. A nonlinear phenomenon (i.e., the larger the cluster size, the larger the growth index κ) has been obtained.