Confinement induces both higher free volume and lower molecular mobility in glycerol

JD Kilburn, PE Sokol, V García-Sakai, MA Alam

Research output: Contribution to journalArticle (Academic Journal)

23 Citations (Scopus)

Abstract

We report measurements of the local free volume and mobility of a glass-forming liquid (glycerol) confined in a mesoporous silica glass. The lower molecular mobility in confinement, measured by neutron scattering spectroscopy, is accompanied by a higher mean free volume size between molecules, measured by positron annihilation lifetime spectroscopy. The confined liquid appears to be perturbed to such an extent that the normally observed free volume/mobility relationship is reversed. This study shows that these effects originate locally at a molecular level.
Translated title of the contributionConfinement induces both higher free volume and lower molecular mobility in glycerol
Original languageEnglish
Pages (from-to)1 - 3
Number of pages3
JournalApplied Physics Letters
Volume92 (3, 033109)
DOIs
Publication statusPublished - Jan 2008

Bibliographical note

Publisher: American Institute of Physics

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