Energy Landscape, Antiplasticization, and Polydispersity Induced Crossover of Heterogeneity in Supercooled Polydisperse Liquids

by: Sneha E Abraham, Sarika M Bhattacharrya, Biman Bagchi

Physical Review Letters, Vol. 100, No. 16. (2008)

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摘要

Polydispersity is found to have a significant effect on the potential energy landscape; the average inherent structure energy decreases with polydispersity. Increasing polydispersity at a fixed volume fraction decreases the glass transition temperature and the fragility of glass formation analogous to the antiplasticization seen in some polymeric melts. An interesting temperature dependent crossover of heterogeneity with polydispersity is observed at low temperature due to the faster buildup of dynamic heterogeneity at lower polydispersity.

@article{citeulike:2759168, abstract = {Polydispersity is found to have a significant effect on the potential energy landscape; the average inherent structure energy decreases with polydispersity. Increasing polydispersity at a fixed volume fraction decreases the glass transition temperature and the fragility of glass formation analogous to the antiplasticization seen in some polymeric melts. An interesting temperature dependent crossover of heterogeneity with polydispersity is observed at low temperature due to the faster buildup of dynamic heterogeneity at lower polydispersity.}, author = {Abraham, Sneha E. and Bhattacharrya, Sarika M. and Bagchi, Biman }, citeulike-article-id = {2759168}, doi = {http://dx.doi.org/10.1103/PhysRevLett.100.167801}, journal = {Physical Review Letters}, keywords = {dyn-het, landscapes, polydisperse}, number = {16}, posted-at = {2008-06-20 02:10:05}, priority = {4}, publisher = {APS}, title = {Energy Landscape, Antiplasticization, and Polydispersity Induced Crossover of Heterogeneity in Supercooled Polydisperse Liquids}, url = {http://dx.doi.org/10.1103/PhysRevLett.100.167801}, volume = {100}, year = {2008} }

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TY - JOUR ID - citeulike:2759168 L3 - citeulike-article-id:2759168 N2 - Polydispersity is found to have a significant effect on the potential energy landscape; the average inherent structure energy decreases with polydispersity. Increasing polydispersity at a fixed volume fraction decreases the glass transition temperature and the fragility of glass formation analogous to the antiplasticization seen in some polymeric melts. An interesting temperature dependent crossover of heterogeneity with polydispersity is observed at low temperature due to the faster buildup of dynamic heterogeneity at lower polydispersity. IS - 16 JF - Physical Review Letters TI - Energy Landscape, Antiplasticization, and Polydispersity Induced Crossover of Heterogeneity in Supercooled Polydisperse Liquids PB - APS VL - 100 KW - dyn-het KW - landscapes KW - polydisperse AU - Abraham, Sneha AU - Bhattacharrya, Sarika AU - Bagchi, Biman PY - 2008/// UR - http://dx.doi.org/10.1103/PhysRevLett.100.167801 ER -

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