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@ARTICLE{RiveraMorn:1017640,
author = {Rivera-Morán, J. Alejandro and Lang, Peter R.},
title = {{A}nalysing {S}ources of {E}rror in {T}otal {I}nternal
{R}eflection {M}icroscopy ({TIRM}) {E}xperiments and {D}ata
{A}nalysis},
journal = {Polymers},
volume = {15},
number = {21},
issn = {2073-4360},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2023-04256},
pages = {4208 -},
year = {2023},
abstract = {Many phenomena observed in synthetic and biological
colloidal suspensions are dominated by the static
interaction energies and the hydrodynamic interactions that
act both between individual particles and also between
colloids and macroscopic interfaces. This calls for methods
that allow precise measurements of the corresponding forces.
One method used for this purpose is total internal
reflection microscopy (TIRM), which has been employed for
around three decades to measure in particular the
interactions between a single particle suspended in a liquid
and a solid surface. However, given the importance of the
observable variables, it is crucial to understand the
possibilities and limitations of the method. In this paper,
we investigate the influence of technically unavoidable
noise effects and an inappropriate choice of particle size
and sampling time on TIRM measurement results. Our main
focus is on the measurement of diffusion coefficients and
drift velocities, as the influence of error sources on
dynamic properties has not been investigated so far. We find
that detector shot noise and prolonged sampling times may
cause erroneous results in the steep parts of the
interaction potential where forces of the order of
pico-Newtons or larger act on the particle, while the effect
of background noise is negligible below certain thresholds.
Furthermore, noise does not significantly affect dynamic
data but we find that lengthy sampling times and/or probe
particles with too small a radius will cause issues. Most
importantly, we observe that dynamic results are very likely
to differ from the standard hydrodynamic predictions for
stick boundary conditions due to partial slip.},
cin = {IBI-4},
ddc = {540},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5244 - Information Processing in Neuronal Networks
(POF4-524)},
pid = {G:(DE-HGF)POF4-5244},
typ = {PUB:(DE-HGF)16},
pubmed = {37959890},
UT = {WOS:001100482200001},
doi = {10.3390/polym15214208},
url = {https://juser.fz-juelich.de/record/1017640},
}