A mechanism for ageing in a deeply supercooled molecular glass

Andrew Cassidy*, Mads R.V. Jørgensen, Artur Glavic, Valeria Lauter, Oksana Plekan, David Field

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

10 Citationer (Scopus)
33 Downloads (Pure)

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.

OriginalsprogEngelsk
TidsskriftChemical Communications
Vol/bind57
Nummer52
Sider (fra-til)6368-6371
Antal sider4
ISSN1359-7345
DOI
StatusUdgivet - 4 jul. 2021

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