1 / 2

Molecular cooperativity in structural relaxation: New Insight Alexei P. Sokolov, University of Akron, DMR 0804571

Molecular cooperativity in structural relaxation: New Insight Alexei P. Sokolov, University of Akron, DMR 0804571.

devorit
Download Presentation

Molecular cooperativity in structural relaxation: New Insight Alexei P. Sokolov, University of Akron, DMR 0804571

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Molecular cooperativity in structural relaxation: New Insight Alexei P. Sokolov, University of Akron, DMR 0804571 Our studies reveal no direct connection between the steepness of the temperature variation of structural relaxation m (fragility) in glass forming liquids and the length scale of dynamic heterogeneity, cooperativity x. This finding contradicts to traditional views and calls for a revision of the basic concepts of the glass transition. Size of dynamic heterogeneity x vs fragility m in various glass forming systems:  -covalent and ionic glasses,  - molecular glasses;  - hydrogen bonding systems;  - polymers. L. Hong, et al.,J.Chem.Phys. 131, 194511 (2009); L. Hong, et al., J. Non-Cryst. Solids (2010, in print)

  2. Molecular cooperativity in structural relaxation: New InsightAlexei P. Sokolov, University of Akron, DMR 0804571 Broader Impact: The presented finding have significant implications on our understanding of the glass transition and of the dynamics of soft materials in general. Education: Under this grant, three students, K. Kumar, S. Khodadadi and L. Hong have completed their PhD. Two undergraduate student K. Freeman and E. Scott have been actively involved in the research. Dr. Sokolov has been also actively involved in organizing Summer School in Biophysics at UT/ORNL. Students meet and discuss with leading researchers during the Summer School in Biophysics at UT/ORNL (Knoxville, 2010).

More Related