Reference : On the Influence of Nano-Scaling on the Glass Transition of Molecular Liquids

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/10993/13368

Title :	On the Influence of Nano-Scaling on the Glass Transition of Molecular Liquids
Language :	English
Author, co-author :	Krüger, Jan-Kristian [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Holtwick, R. [> >]
	le Coutre, Andre [> >]
	Baller, Jörg [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Publication date :	1999
Journal title :	Nanostructured Materials
Publisher :	Karger
Volume :	12
Issue/season :	1
Pages :	519-522
Peer reviewed :	Yes (verified by ORBilu)
ISSN :	0965-9773
e-ISSN :	1872-9150
City :	Basel
Country :	Switzerland
Keywords :	[en] glass transition ; Brillouin spectroscopy
Abstract :	[en] The nature of the glass transition is still a matter of debate. We used temperature modulated DSC (TMDSC) and Brillouin spectroscopy ( BS ) to investigate the freezing behaviour of canonical glasses ( salol and di-n-butyl-phtalate (DBP)) confined to controlled pore glasses (CPG) with pore diameters between 2.5 and 20 nm. The temperature behaviour of the heat capacity of the composite system deviates from the bulk fluid properties and we interpret the remaining kink-like anomaly at Tg as a static glass transition. In smaller pores Tg is only slightly shifted to lower temperatures. This operative Tg is in good agreement with sound velocity data showing a sharp kink at Tg. The working hypothesis of the existence of a static glass transition is supported by the fact that the -relaxation process disappears with decreasing pore diameter.
Permalink :	http://hdl.handle.net/10993/13368
DOI :	10.1016/S0965-9773(99)00173-7
Other URL :	http://www.sciencedirect.com/science/article/B6TXK-3XK1GNT-47/2/76763be9987f4ca92bd2876f8c069735

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