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Updated: Jun 21, 2026

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
09:32

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films

Published on: January 26, 2016

在玻璃过渡温度以上的聚合物中,单分子探测局部细分放松动态

Els Braeken1, Gert De Cremer, Philippe Marsal

  • 1Department of Chemistry and Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium.

Journal of the American Chemical Society
|August 7, 2009
PubMed
概括

二胺 (TDI) 分子在聚烯 (PS) 中探测聚合物动力学,使用单分子光谱学. TDI揭示了与聚合物放松过程相关的形状变化.

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Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers energy to a nearby...