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@ARTICLE{Naumann:152184,
author = {Naumann, Philipp and Datta, Sascha and Sottmann, Thomas and
Arlt, Bastian and Frielinghaus, Henrich and Wiegand, Simone},
title = {{I}sothermal {B}ehavior of the {S}oret {E}ffect in
{N}onionic {M}icroemulsions: {S}ize {V}ariation by {U}sing
{D}ifferent n -{A}lkanes},
journal = {The journal of physical chemistry / B},
volume = {118},
number = {12},
issn = {1520-5207},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2014-01958},
pages = {3451 - 3460},
year = {2014},
abstract = {In this work we investigate the thermodiffusion behavior of
microemulsiondroplets of the type H2O/n-alkane/C12E5
(pentaethylene glycol monododecylether) using the n-alkanes:
n-octane, n-decane, n-dodecane, and n-tetradecane. In
orderto determine the thermodiffusion behavior of these
microemulsion droplets, we applythe infrared thermal
diffusion forced Rayleigh scattering (IR-TDFRS) technique.
Wemeasure the Soret coefficient (ST) as function of the
structure upon approaching theemulsification failure
boundary (efb) and as a function of the radius of the
spherical o/wmicroemulsion droplets close to the efb. By
varying the chain length of the n-alkanes, weare able to
study the thermodiffusion behavior of spherical o/w
microemulsion dropletsof different sizes at the same
temperature. In the investigated range a linear dependenceof
the Soret coefficient as function of the radius was found.
By use of a proposedrelationship between the Soret
coefficient and the temperature dependence of theinterfacial
tension, the transition layer l could be determined for the
first time.Additionally, small angle neutron scattering
(SANS) experiments are performed todetermine the size and to
prove that the shape of the microemulsion droplets is
spherical close to the efb. Accordingly, thescattering
curves could be quantitatively described by a combination of
a spherical core−shell form factor and sticky hard
spherestructure factor.},
cin = {ICS-3 / ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS
(München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II},
ddc = {530},
cid = {I:(DE-Juel1)ICS-3-20110106 / I:(DE-Juel1)ICS-1-20110106 /
I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {451 - Soft Matter Composites (POF2-451) / DFG 47816710 -
Soret effect in surfactant systems and microemulsions
(47816710)},
pid = {G:(DE-HGF)POF2-451 / G:(GEPRIS)47816710},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000333578000023},
doi = {10.1021/jp412126n},
url = {https://juser.fz-juelich.de/record/152184},
}