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A mechanism for ageing in a deeply supercooled molecular glass

Cassidy, Andrew ; Jørgensen, Mads R.V. LU orcid ; Glavic, Artur ; Lauter, Valeria ; Plekan, Oksana and Field, David (2021) In Chemical Communications 57(52). p.6368-6371
Abstract

Measurements of the decay of electric fields, formed spontaneously within vapour-deposited films ofcis-methyl formate, provide the first direct assessment of the energy barrier to secondary relaxation in a molecular glass. At temperatures far below the glass transition temperature, the mechanism of relaxation is shown to be through hindered molecular rotation. Magnetically-polarised neutron scattering experiments exclude diffusion, which is demonstrated to take place only close to the glass transition temperature.

Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Communications
volume
57
issue
52
pages
4 pages
publisher
Royal Society of Chemistry
external identifiers
  • pmid:34105533
  • scopus:85108873118
ISSN
1359-7345
DOI
10.1039/d1cc01639c
language
English
LU publication?
yes
id
fc094c10-309e-4bcf-b2d6-0a61b51f5bf2
date added to LUP
2021-08-20 13:10:24
date last changed
2025-04-04 14:35:07
@article{fc094c10-309e-4bcf-b2d6-0a61b51f5bf2,
  abstract     = {{<p>Measurements of the decay of electric fields, formed spontaneously within vapour-deposited films ofcis-methyl formate, provide the first direct assessment of the energy barrier to secondary relaxation in a molecular glass. At temperatures far below the glass transition temperature, the mechanism of relaxation is shown to be through hindered molecular rotation. Magnetically-polarised neutron scattering experiments exclude diffusion, which is demonstrated to take place only close to the glass transition temperature.</p>}},
  author       = {{Cassidy, Andrew and Jørgensen, Mads R.V. and Glavic, Artur and Lauter, Valeria and Plekan, Oksana and Field, David}},
  issn         = {{1359-7345}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{52}},
  pages        = {{6368--6371}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Chemical Communications}},
  title        = {{A mechanism for ageing in a deeply supercooled molecular glass}},
  url          = {{http://dx.doi.org/10.1039/d1cc01639c}},
  doi          = {{10.1039/d1cc01639c}},
  volume       = {{57}},
  year         = {{2021}},
}