Physical Chemistry Chemical Physics, volume 13, issue 5, pages 1843-1848

Low-temperature dynamics in amorphous polymers and low-molecular-weight glasses—what is the difference?

Publication typeJournal Article
Publication date2011-01-01
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.3
ISSN14639076, 14639084
Physical and Theoretical Chemistry
General Physics and Astronomy
Abstract
Numerous experiments have shown that the low-temperature dynamics of a wide variety of disordered solids is qualitatively universal. However, most of these results were obtained with ensemble-averaging techniques which hide the local parameters of the dynamic processes. We used single-molecule (SM) spectroscopy for direct observation of the dynamic processes in disordered solids with different internal structure and chemical composition. The surprising result is that the dynamics of low-molecular-weight glasses and short-chain polymers does not follow, on a microscopic level, the current concept of low-temperature glass dynamics. An extra contribution to the dynamics was detected causing irreproducible jumps and drifts of the SM spectra on timescales between milliseconds and minutes. In most matrices consisting of small molecules and oligomers, the spectral dynamics was so fast that SM spectra could hardly or not at all be recorded and only irregular fluorescence flares were observed. These results provide new mechanistic insight into the behavior of glasses in general: At low temperatures, the local dynamics of disordered solids is not universal but depends on the structure and chemical composition of the material.

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Eremchev I. Y. et al. Low-temperature dynamics in amorphous polymers and low-molecular-weight glasses—what is the difference? // Physical Chemistry Chemical Physics. 2011. Vol. 13. No. 5. pp. 1843-1848.
GOST all authors (up to 50) Copy
Eremchev I. Y., Vainer Y. G., Naumov A. V., Kador L. Low-temperature dynamics in amorphous polymers and low-molecular-weight glasses—what is the difference? // Physical Chemistry Chemical Physics. 2011. Vol. 13. No. 5. pp. 1843-1848.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1039/c0cp01690j
UR - https://doi.org/10.1039/c0cp01690j
TI - Low-temperature dynamics in amorphous polymers and low-molecular-weight glasses—what is the difference?
T2 - Physical Chemistry Chemical Physics
AU - Vainer, Yury G.
AU - Naumov, Andrei V
AU - Eremchev, Ivan Yu.
AU - Kador, L
PY - 2011
DA - 2011/01/01 00:00:00
PB - Royal Society of Chemistry (RSC)
SP - 1843-1848
IS - 5
VL - 13
SN - 1463-9076
SN - 1463-9084
ER -
BibTex |
Cite this
BibTex Copy
@article{2011_Eremchev,
author = {Yury G. Vainer and Andrei V Naumov and Ivan Yu. Eremchev and L Kador},
title = {Low-temperature dynamics in amorphous polymers and low-molecular-weight glasses—what is the difference?},
journal = {Physical Chemistry Chemical Physics},
year = {2011},
volume = {13},
publisher = {Royal Society of Chemistry (RSC)},
month = {jan},
url = {https://doi.org/10.1039/c0cp01690j},
number = {5},
pages = {1843--1848},
doi = {10.1039/c0cp01690j}
}
MLA
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MLA Copy
Eremchev, Ivan Yu., et al. “Low-temperature dynamics in amorphous polymers and low-molecular-weight glasses—what is the difference?.” Physical Chemistry Chemical Physics, vol. 13, no. 5, Jan. 2011, pp. 1843-1848. https://doi.org/10.1039/c0cp01690j.
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