Article (Scientific journals)
Organization versus frustration: low temperature transitions in a gelatine-based gel
Philipp, Martine; Müller, Ulrich; Sanctuary, Roland et al.
2008In New Journal of Physics, 10, p. 093028-093043
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Abstract :
[en] A commercial physical gel composed of gelatine, water and glycerol shows a sol–gel transition which has been resolved by optical rotation measurements by step-wise heating the gel. This transition is not observable in the longitudinal acoustic mode measured at hypersonic frequencies with Brillouin spectroscopy. Depending on the thermal treatment of the investigated material during the sol–gel transition and within the gel state, Brillouin spectroscopy reflects tremendously different hypersonic dynamics. These distinct dynamics are responsible for the formation of different glassy states at low temperatures including that of a glass-ceramic. The large variety of super-cooled and glassy states is attributed to distinct distributions of the gel's constituents within the samples. Surprisingly, the same gel state can be produced either by annealing the gel over months or by the non-equilibrium effect of thermo-diffusion (Soret effect) in the course of some minutes.
Disciplines :
Physics
Materials science & engineering
Identifiers :
UNILU:UL-ARTICLE-2009-038
Author, co-author :
Philipp, Martine ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Müller, Ulrich ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Sanctuary, Roland ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Baller, Jörg 
Krüger, Jan-Kristian 
Language :
English
Title :
Organization versus frustration: low temperature transitions in a gelatine-based gel
Publication date :
2008
Journal title :
New Journal of Physics
ISSN :
1367-2630
Publisher :
Institut of Physics
Volume :
10
Pages :
093028-093043
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 19 December 2013

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