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A platform for research: civil engineering, architecture and urbanism
Macroscopic Elasticity of Nanoporous Silicon: Bulk and Surface Effects
Abstract Nanoporous silicon is an elastic material for which the length scale of the pores renders inappropriate the use of the tools from continuum homogenization theories to obtain overall mechanical behavior. To encompass this difficulty we propose a model based on discrete interactions at the microscale and we use discrete ho-mogenization to compute the bulk macroscopic material response for various sizes and shapes of pores. When pore sizes are only several nm, the specific surface of porous silicon is very important and surface effects, like oxidation in dry environment, have a significant impact on the macroscopic bulk properties. We extend the proposed model to include also structural changes that model oxidation near the surface. We discuss the size effect due to the presence of bulk and surface energy and compare our theoretical predictions with the available experimental data.
Macroscopic Elasticity of Nanoporous Silicon: Bulk and Surface Effects
Abstract Nanoporous silicon is an elastic material for which the length scale of the pores renders inappropriate the use of the tools from continuum homogenization theories to obtain overall mechanical behavior. To encompass this difficulty we propose a model based on discrete interactions at the microscale and we use discrete ho-mogenization to compute the bulk macroscopic material response for various sizes and shapes of pores. When pore sizes are only several nm, the specific surface of porous silicon is very important and surface effects, like oxidation in dry environment, have a significant impact on the macroscopic bulk properties. We extend the proposed model to include also structural changes that model oxidation near the surface. We discuss the size effect due to the presence of bulk and surface energy and compare our theoretical predictions with the available experimental data.
Macroscopic Elasticity of Nanoporous Silicon: Bulk and Surface Effects
Magoariec, H. (author) / Danescu, A. (author)
2009-01-01
10 pages
Article/Chapter (Book)
Electronic Resource
English
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