001034076 001__ 1034076
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001034076 037__ $$aFZJ-2024-06897
001034076 041__ $$aEnglish
001034076 1001_ $$0P:(DE-Juel1)130646$$aFrielinghaus, Henrich$$b0$$ufzj
001034076 1112_ $$aMLZ User Meeting 2024$$cMunich$$d2024-12-05 - 2024-12-06$$wGermany
001034076 245__ $$aStructure and dynamics of a quasi-binary liquid in 2 and 3 dimensions
001034076 260__ $$c2024
001034076 3367_ $$033$$2EndNote$$aConference Paper
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001034076 520__ $$aWe investigated a quasi-binary liquid of 3-methyl pyridine and heavy water at the critical composition at different temperatures close to the phase transition. When adding antagonistic salt sodium tetraphenylborate the ions form locally lamellar structures that enclose the binary fluid. Then the system becomes 2-dimensional. Looking at the critical fluctuations, the dimensionality is confirmed. The dynamics of the 3 and 2-dimensional system displays diffusion on large length scales (dynamic light scattering) and fluctuations of the boundaries between the domains on small length scales (neutron spin echo spectroscopy). From that we obtain a master curve following the theory of Kawasaki. On the one hand the critical exponent is obtained that can be rationalized by theoretical concepts. The overall prefactor  of the master curve displays approx. 2 times faster diffusion for the 2-dimensional compared to the 3-dimensional system. This can be explained by much lower viscosities (also measured) of the 2-dimensional system. This is theoretically explained by the lubrication effect.Looking at the high- scattering, we determined the critical correlation-function exponent  that is extraordinarily large for the 2-dimensional system. It seems that the composition fluctuations in the 2 dimensions and the 3rd dimension are orientationally averaged.A short excursion will also look on an aerogel as porous material that interferes with the binary fluid.
001034076 536__ $$0G:(DE-HGF)POF4-6G4$$a6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4)$$cPOF4-6G4$$fPOF IV$$x0
001034076 536__ $$0G:(DE-HGF)POF4-632$$a632 - Materials – Quantum, Complex and Functional Materials (POF4-632)$$cPOF4-632$$fPOF IV$$x1
001034076 65027 $$0V:(DE-MLZ)SciArea-210$$2V:(DE-HGF)$$aSoft Condensed Matter$$x0
001034076 65017 $$0V:(DE-MLZ)GC-1602-2016$$2V:(DE-HGF)$$aPolymers, Soft Nano Particles and  Proteins$$x0
001034076 693__ $$0EXP:(DE-MLZ)NOSPEC-20140101$$5EXP:(DE-MLZ)NOSPEC-20140101$$eNo specific instrument$$x0
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001034076 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130646$$aForschungszentrum Jülich$$b0$$kFZJ
001034076 9131_ $$0G:(DE-HGF)POF4-6G4$$1G:(DE-HGF)POF4-6G0$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lGroßgeräte: Materie$$vJülich Centre for Neutron Research (JCNS) (FZJ)$$x0
001034076 9131_ $$0G:(DE-HGF)POF4-632$$1G:(DE-HGF)POF4-630$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vMaterials – Quantum, Complex and Functional Materials$$x1
001034076 9141_ $$y2024
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001034076 9201_ $$0I:(DE-Juel1)JCNS-FRM-II-20110218$$kJCNS-FRM-II$$lJCNS-FRM-II$$x0
001034076 9201_ $$0I:(DE-Juel1)JCNS-4-20201012$$kJCNS-4$$lJCNS-4$$x1
001034076 9201_ $$0I:(DE-588b)4597118-3$$kMLZ$$lHeinz Maier-Leibnitz Zentrum$$x2
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