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@ARTICLE{Sindram:904322,
author = {Sindram, Julian and Krüsmann, Marcel and Otten, Marius and
Pauly, Thomas and Nagel-Steger, Luitgard and Karg, Matthias},
title = {{V}ersatile {R}oute toward {H}ydrophobically
{P}olymer-{G}rafted {G}old {N}anoparticles from {A}queous
{D}ispersions},
journal = {The journal of physical chemistry / B},
volume = {125},
number = {29},
issn = {1089-5647},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2021-05892},
pages = {8225 - 8237},
year = {2021},
abstract = {Stabilization of gold nanoparticles in organic solvents is
a key challenge in making them available for a wider range
of material applications. Polymers are often used as
stabilizing ligands because they also allow for the
introduction of new properties and functionalities. Many of
the established synthesis protocols for gold nanoparticles
are water-based. However, the insolubility of many synthetic
polymers in water renders the direct functionalization of
aqueous particle dispersions with these ligands difficult.
Here, we report on an approach for the functionalization of
gold nanoparticles, which were prepared by aqueous
synthesis, with hydrophobic polymer ligands and their
characterization in nonpolar, organic dispersions. Our
method employs an auxiliary ligand to first transfer gold
nanoparticles from an aqueous to an organic medium. In the
organic phase, the auxiliary ligand is then displaced by
thiolated polystyrene ligands to form a dense polymer brush
on the particle surface. We characterize the structure of
the ligand shell using electron microscopy, scattering
techniques, and ultracentrifugation and analyze the
influence of the molecular weight of the polystyrene ligands
on the structure of the polymer brush. We further
investigate the colloidal stability of
polystyrene-functionalized gold nanoparticles in various
organic solvents. Finally, we extend the use of our protocol
from small, spherical gold nanoparticles to larger gold
nanorods and nanocubes.},
cin = {IBI-7},
ddc = {530},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {5244 - Information Processing in Neuronal Networks
(POF4-524)},
pid = {G:(DE-HGF)POF4-5244},
typ = {PUB:(DE-HGF)16},
pubmed = {34260239},
UT = {WOS:000680434200029},
doi = {10.1021/acs.jpcb.1c03772},
url = {https://juser.fz-juelich.de/record/904322},
}