Dynamics of Cadmium Sulfide Nanoparticles within Polystyrene Melts

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

URL: https://pubs.acs.org/doi/10.1021/ma500956b
DOI: 10.1021/ma500956b


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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