We have used real-time low-energy electron microscopy to observe the growth and shape evolutions of self-assembled stress domains on Si(111) surfaces. We find that elastic strain leads to dramatic transformations in the shapes of large domains that are not predicted by existing theoretical models. By comparing the experimental observations on the formation of the stress domains with dynamic growth simulations, we have developed a quantitative understanding of how a self-assembling system falls out of equilibrium. Our work shows the nonequilibrium shapes that a domain adopts during growth depending very strongly on the azimuthal dependence of its boundary energy.
机构:Laboratoire d'Ultrasons et de Dynamique des Fluides Complexes, Unité de Recherche Associée au C.N.R.S. no. 851, Université Louis Pasteur, 67070 Strasbourg Cedex
LEQUEUX, F
COURTY, F
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机构:Laboratoire d'Ultrasons et de Dynamique des Fluides Complexes, Unité de Recherche Associée au C.N.R.S. no. 851, Université Louis Pasteur, 67070 Strasbourg Cedex
机构:
Univ Barcelona, Fac Fis, Dept Fis Mat Condensada, Avinguda Diagonal 647, E-08028 Barcelona, Spain
Univ Barcelona, Inst Nanociencia & Nanotecnol, Barcelona, SpainUniv Barcelona, Fac Fis, Dept Fis Mat Condensada, Avinguda Diagonal 647, E-08028 Barcelona, Spain
Arango-Restrepo, A.
Barragan, D.
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Univ Nacl Colombia, Fac Ciencias, Escuela Quim, Carrera 65 59A-110,Bloque 16, Nucleo El Volador, Medellin, ColombiaUniv Barcelona, Fac Fis, Dept Fis Mat Condensada, Avinguda Diagonal 647, E-08028 Barcelona, Spain
Barragan, D.
Rubi, J. M.
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Univ Barcelona, Fac Fis, Dept Fis Mat Condensada, Avinguda Diagonal 647, E-08028 Barcelona, SpainUniv Barcelona, Fac Fis, Dept Fis Mat Condensada, Avinguda Diagonal 647, E-08028 Barcelona, Spain
机构:
Imperial Coll London, Dept Bioengn, South Kensington Campus, London SW7 2AZ, EnglandImperial Coll London, Dept Bioengn, South Kensington Campus, London SW7 2AZ, England