Thermal and chemical nanofractal relaxation |
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| Authors: | C Bréchignac Ph Cahuzac F Carlier C Colliex M de Frutos N Kébaïli J Le Roux A Masson and B Yoon |
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| Institution: | (1) Laboratoire Aimé Cotton, CNRS, bâtiment 505, Université Paris-Sud, 91405 Orsay Cedex, France;(2) Laboratoire de Physique des solides, bâtiment 510, Université Paris-Sud, 91405 Orsay Cedex, France |
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| Abstract: | We studied shape relaxation of nano-fractal islands,
during annealing, after their growth from antimony cluster
deposition on graphite surface. Annealing at
180°C shows evidence of an increase
of the fractal branch width with time followed by branch
fragmentation, without changing the fractal dimension. The time
evolution of the width of the arm suggests the surface
self-diffusion mechanism as the main relaxation process. With
Monte Carlo simulations, we confirmed the observed behavior.
Comparison is done with our previous results on fragmentation of
nano-fractal silver islands when impurity added to the incident
cluster promotes rapid fragmentation by surface self-diffusion
enhancement 1]. |
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| Keywords: | 61 46 +w Nanoscale materials: clusters nanoparticles nanotubes and nanocrystals 61 43 Hv Fractals macroscopic aggregates (including diffusion-limited aggregates) 81 07 -b Nanoscale materials and structures: fabrication and
characterization |
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