SPATIO-TEMPORAL THERMAL FLUCTUATIONS AND LOCAL SUSCEPTIBILITY IN DISORDERED POLYMERS
| Autor: | M. E. Majewski, N. E. Israeloff, P. S. Crider |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Materials science Condensed matter physics General Mathematics Complex system General Physics and Astronomy Thermal fluctuations Polymer Dielectric Condensed Matter::Disordered Systems and Neural Networks Condensed Matter::Soft Condensed Matter Polarization density chemistry Microscopy Glass transition Nanoscopic scale |
| Zdroj: | Fluctuation and Noise Letters. :L239-L247 |
| ISSN: | 1793-6780 0219-4775 |
| DOI: | 10.1142/s0219477507003891 |
| Popis: | Spatial and temporal fluctuations of the electric polarization were imaged in polymer thin films near the glass transition using electric force microscopy. Below the glass transition the fluctuations are quasi-static and spatial fluctuations were found to quantitatively agree with predictions for thermal fluctuations. Temporal fluctuations appear near the glass transition. Images of the space-time nanoscale dynamics near the glass transition are produced and analyzed. Local, complex dielectric susceptibility was also studied, and shows that dynamics on the free-surface are faster relative to the bulk. |
| Databáze: | OpenAIRE |
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