Thermal and chemical nanofractal relaxation |
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| Authors: | C. Bré chignac, Ph. Cahuzac, F. Carlier, C. Colliex, M. de Frutos, N. Ké baï li, J. Le Roux, A. Masson B. Yoon |
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| Affiliation: | (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 clusterdeposition on graphite surface. Annealing at180°C shows evidence of an increaseof the fractal branch width with time followed by branchfragmentation, without changing the fractal dimension. The timeevolution of the width of the arm suggests the surfaceself-diffusion mechanism as the main relaxation process. WithMonte Carlo simulations, we confirmed the observed behavior.Comparison is done with our previous results on fragmentation ofnano-fractal silver islands when impurity added to the incidentcluster promotes rapid fragmentation by surface self-diffusionenhancement [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 andcharacterization |
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