Pattern coarsening in a 2D hexagonal system
| Autor: | John M. Sebastian, Christopher Harrison, Zhengdong Cheng, David A. Huse, Matthew L. Trawick, Dan E. Angelescu, Richard A. Register, Daniel A. Vega, Douglas H. Adamson, Paul Chaikin |
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| Rok vydání: | 2004 |
| Předmět: |
Física Atómica
Molecular y Química Materials science Condensed matter physics Annealing (metallurgy) Ciencias Físicas Time evolution General Physics and Astronomy Power law Condensed Matter::Materials Science Correlation function (statistical mechanics) Lattice (order) Grain boundary Thin film Dislocation CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Europhysics Letters (EPL). 67:800-806 |
| ISSN: | 1286-4854 0295-5075 |
| DOI: | 10.1209/epl/i2004-10126-5 |
| Popis: | We have studied the ordering dynamics of a two-dimensional system which consists of a single layer of spherical block copolymer microdomains in a thin film. We follow the annealing process after a quench from the disordered state by electron microscopy and time-lapse atomic force microscopy. At late times the orientational correlation length ξ 6 of the microdomain lattice exhibits a t 1/4 temporal power law. We compare the time evolution of the densities of dislocations, disclinations and the dislocation orientational correlation function. While most disclinations condense into dislocations and most dislocations condense into "grain boundaries", the dynamics appear to involve the interplay of disclinations and lines of dislocations. Rather than isolated grains shrinking, the most frequently observed process is the collapse of a smaller grain which resides on the boundary of two larger grains. Fil: Harrison, C.. University of Princeton; Estados Unidos Fil: Angelescu, D. E.. University of Princeton; Estados Unidos Fil: Trawick, M.. University of Princeton; Estados Unidos Fil: Cheng, Z.. University of Princeton; Estados Unidos Fil: Huse, D. A.. University of Princeton; Estados Unidos Fil: Chaikin, P. M.. University of Princeton; Estados Unidos Fil: Vega, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. University of Princeton; Estados Unidos Fil: Sebastian, J. M.. University of Princeton; Estados Unidos Fil: Register, R. A.. University of Princeton; Estados Unidos Fil: Adamson, D. H.. University of Princeton; Estados Unidos |
| Databáze: | OpenAIRE |
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