Jang, Woo-Sik, Koo, Peter, Bryson, Kyle, Narayanan, Suresh, Sandy, Alec, Russell, Thomas P., Mochrie, Simon G. (2014) Dynamics of Cadmium Sulfide Nanoparticles within Polystyrene Melts. Macromolecules, 47 (18). pp. 6483-6490. ISSN 0024-9297
Abstract
We present a detailed study of the dynamics of cadmium sulfide nanoparticles suspended in polystyrene homopolymer matrices using X-ray photon correlation spectroscopy for temperatures between 120 and 180 °C. For low molecular weight polystyrene homopolymers, the observed dynamics show a crossover from diffusive to hyper-diffusive behavior with decreasing temperatures. For higher molecular weight polystyrene, the nanoparticle dynamics appear hyper-diffusive at all temperatures studied. The relaxation time and characteristic velocity determined from the measured hyper-diffusive dynamics reveal that the activation energy and underlying forces determined are on the order of 2.14 × 10–19 J and 87 pN, respectively.
| Item Type: | Paper |
|---|---|
| Subjects: | Investigative techniques and equipment > X-Ray Diffraction |
| CSHL Authors: | |
| Communities: | CSHL labs > Koo Lab |
| Depositing User: | Matthew Dunn |
| Date: | 2014 |
| Date Deposited: | 16 Sep 2019 18:22 |
| Last Modified: | 16 Sep 2019 18:22 |
| URI: | https://repository.cshl.edu/id/eprint/38398 |
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