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@ARTICLE{Kang:891850,
author = {Kang, Kyongok and Lee, Dongwook and Seo, Jiwon},
title = {{F}requency-responsive cooperativity of graphene oxide
complexes under a low {AC} bulk electric field},
journal = {Journal of molecular liquids},
volume = {335},
issn = {0167-7322},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-01770},
pages = {116151 -},
year = {2021},
abstract = {Graphene oxide (GO) is a promising material for the
construction of biological functional surfaces and
corresponding biomedical applications. The physical
properties of sheets of GO are determined by its
conductivity, flexibility (being just a few atomic carbon
layers thick), and hydrophilicity/hydrophobicity. In order
to exploiting multitask surfaces, however, controlling
reliable tunability of the complex formation with other
macromolecules in aqueous environments is highly non-trivial
due to the hydrophobic nature of GO. Thus, one effective way
of complicated physical process of dealing with aqueous
systems of GO is to perform the complex formation under
in-situ external fields. In this paper, we report the
response of GO-sheets, complexed with spherical colloidal
polystyrene particles, nafion, and long and thin DNA-viruses
(fd), in alternating electric fields, probed by means of
novel experimental methods of image-time correlation
spectroscopy and small-angle dynamic light scattering. Here,
the frequency-responsive reorientations of a GO-sheet are
interpreted by random orientations of particles. As results,
we have found that GO carries overall local reorientations
with feedback oscillations, as well in the GO-complexes (of
a colloidal sphere polymerized polystyrene (PPs) and nafion
solution). However, such oscillations are absent, as
overdamped Brownian motion, in the mixture of DNA-virus
suspension (with GO-PPs). This indicates that Brownian
fluctuations of GO can be effectively stabilized, and
cooperated in the membrane-based, isotropic rod-mesh network
of DNA-virus (fd) suspension. We hope then the results are
useful to foster better designs of processing GO-sheets in
the controls of accessible biological and biomedical
applications.},
cin = {IBI-4},
ddc = {540},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {524 - Molecular and Cellular Information Processing
(POF4-524)},
pid = {G:(DE-HGF)POF4-524},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000662831600040},
doi = {10.1016/j.molliq.2021.116151},
url = {https://juser.fz-juelich.de/record/891850},
}