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@ARTICLE{Lee:903040,
author = {Lee, Namkyu and Afanasenkau, Dzmitry and Rinklin, Philipp
and Wolfrum, Bernhard and Wiegand, Simone},
title = {{T}emperature profile characterization with fluorescence
lifetime imaging microscopy in a thermophoretic chip},
journal = {The European physical journal / E},
volume = {44},
number = {10},
issn = {1292-8941},
address = {Heidelberg},
publisher = {Springer},
reportid = {FZJ-2021-04769},
pages = {130},
year = {2021},
abstract = {This study introduces a thermophoretic lab-on-a-chip device
to measure the Soret coefficient. We use resistive heating
of a microwire on the chip to induce a temperature gradient,
which is measured by fluorescence lifetime imaging
microscopy (FLIM). To verify the functionality of the
device, we used dyed polystyrene particles with a diameter
of 25 nm. A confocal microscope is utilized to monitor the
concentration profile of colloidal particles in the
temperature field. Based on the measured temperature and
concentration differences, we calculate the corresponding
Soret coefficient. The same particles have been recently
investigated with thermal diffusion forced Rayleigh
scattering (TDFRS) and we find that the obtained Soret
coefficients agree with literature results. This chip offers
a simple way to study the thermophoretic behavior of
biological systems in multicomponent buffer solutions
quantitatively, which are difficult to study with optical
methods solely relying on the refractive index contrast.},
cin = {IBI-4},
ddc = {530},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {34668081},
UT = {WOS:000708879000001},
doi = {10.1140/epje/s10189-021-00133-7},
url = {https://juser.fz-juelich.de/record/903040},
}