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@INPROCEEDINGS{Afanasenkau:187640,
author = {Afanasenkau, Dzmitry and Syshchyk, Olga and Kunitskaya,
Yulia and Wang, Zilin and Wiegand, Simone},
title = {{S}tudying {S}oret effect using microfluidic cell},
reportid = {FZJ-2015-01266},
year = {2014},
abstract = {Soert effect (thermophoresis or thermodiffusion) is
transport of mass in a multicomponent system due to presence
of a temperature gradient. The effect nowdays finds many
application in (bio)chemical analisys, separation of
mixtures, biotechnology and semiconductor industry.To study
the effect one needs to create relatively high temperature
gradients keeping the temperature difference at the same
time relatively small to maintain the linearity of the
system. We try to achive this by reducing the dimensions of
the system. We developed a microfluidic cell which allows
observing thermal diffusion in the solution of colloids and
could be also applied for investigation of thermophoretic
phenomena in biological systems such as lipid bilayers and
living cells.The developed cell consist of three channels:
two relatively big ones for providing high flow rate of hot
and cold liquid and a small channel in between them which
contains the sample to study. The cell is produced by
micromilling the Plexiglas block with a CNC machine. The
central channel is made very flat (hight=30 um, width=100
um) to prevent convection.To characterize the temperature
distribution in our cell we used fluorescence life-time
microscopy (FLIM) with Rhodamine B as a temperature
sensitive dye.The cell was applied to investigate
thermodiffusion of latex micro and nano beads in a size
range from 25 nm to 1 mn in water. The Sore coefficient for
all investigated particle sizes was defined from the
equilibrium distribution. For nanobeads it was compared with
the values obtained by TDFRS measurements.},
month = {Nov},
date = {2014-11-11},
organization = {Jülich Soft Matter Days 2014, Bad
Honnef (Germany), 11 Nov 2014 - 14 Nov
2014},
cin = {ICS-3},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {451 - Soft Matter Composites (POF2-451)},
pid = {G:(DE-HGF)POF2-451},
typ = {PUB:(DE-HGF)1},
url = {https://juser.fz-juelich.de/record/187640},
}