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@ARTICLE{Jochum:862390,
author = {Jochum, Clemens and Adžić, Nataša and Stiakakis,
Emmanuel and Derrien, Thomas L. and Luo, Dan and Kahl,
Gerhard and Likos, Christos N.},
title = {{S}tructure and stimuli-responsiveness of all-{DNA}
dendrimers: theory and experiment.},
journal = {Nanoscale},
volume = {11},
number = {4},
issn = {2040-3372},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2019-02718},
pages = {1604 - 1617},
year = {2019},
abstract = {We present a comprehensive theoretical and experimental
study of the solution phase properties of a DNA-based family
of nanoparticles - dendrimer-like DNA molecules (DL-DNA).
These charged DNA dendrimers are novel macromolecular
aggregates, which hold high promise in targeted
self-assembly of soft matter systems in the bulk and at
interfaces. To describe the behaviour of this family of
dendrimers (with generations ranging from G1 to G7), we use
a theoretical model in which base-pairs of a single DL-DNA
molecule are modeled by charged monomers, whose interactions
are chosen to mimic the equilibrium properties of DNA
correctly. Experimental results on the sizes and
conformations of DL-DNA are based on static and dynamic
light scattering; and molecular dynamics simulations are
employed to model the equilibrium properties of DL-DNA,
which compare favorably to the findings from experiments
while at the same time providing a host of additional
information and insight into the molecular structure of the
nanostructures. We also examine the salt-responsiveness of
these macromolecules, finding that despite the strong
screening of electrostatic interactions brought about by the
added salt, the macromolecules shrink only slightly, their
size robustness stemming from the high bending rigidity of
the DNA-segments. The study of these charged dendrimer
systems is an important field of research in the area of
soft matter due to their potential role for various
interdisciplinary applications, ranging from molecular cages
and carriers for drug delivery in a living organism to the
development of dendrimer- and dendron-based ultra-thin films
in the area of nanotechnology. These findings are essential
to determine if DL-DNA is a viable candidate for the
experimental realization of cluster crystals in the bulk, a
novel form of solid with multiple site occupancy.},
cin = {ICS-3},
ddc = {600},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30311616},
UT = {WOS:000459910900062},
doi = {10.1039/C8NR05814H},
url = {https://juser.fz-juelich.de/record/862390},
}