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@ARTICLE{Adi:1020203,
author = {Adžić, Nataša and Jochum, Clemens and Likos, Christos N.
and Stiakakis, Emmanuel},
title = {{E}ngineering ultrasoft interactions in stiff all-{DNA}
dendrimers bysite-specific control of scaffold flexibility},
journal = {Small},
volume = {20},
number = {21},
issn = {1613-6810},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2023-05870},
pages = {2308763},
year = {2024},
abstract = {A combined experimental and theoretical study of the
structural correlations in moderately concentrated
suspensions of all‐DNA dendrimers of the second generation
(G2) with controlled scaffold rigidity is reported here.
Small‐angle X‐ray scattering experiments in concentrated
aqueous saline solutions of stiff all‐DNA G2 dendritic
constructs reveal a novel anomalous liquid‐like phase
behavior which is reflected in the calculated structure
factors as a two‐step increase at low scattering wave
vectors. By developing a new design strategy for adjusting
the particle's internal flexibility based on
site‐selective incorporation of single‐stranded DNA
linkers into the dendritic scaffold, it is shown that this
unconventional type of self‐organization is strongly
contingent on the dendrimer's stiffness. A comprehensive
computer simulation study employing dendritic models with
different levels of coarse‐graining, and two theoretical
approaches based on effective, pair‐potential
interactions, remarkably confirmed the origin of this
unusual liquid‐like behavior. The results demonstrate that
the precise control of the internal structure of the
dendritic scaffold conferred by the DNA can be potentially
used to engineer a rich palette of novel ultrasoft
interaction potentials that could offer a route for directed
self‐assembly of intriguing soft matter phases and
experimental realizations of a host of unusual phenomena
theoretically predicted for ultrasoft interacting systems.},
cin = {IBI-4},
ddc = {620},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524) / QLUSTER - Quantum and Classical Ultrasoft
Matter (101072964)},
pid = {G:(DE-HGF)POF4-5241 / G:(EU-Grant)101072964},
typ = {PUB:(DE-HGF)16},
pubmed = {38183376},
UT = {WOS:001174111700001},
doi = {10.1002/smll.202308763},
url = {https://juser.fz-juelich.de/record/1020203},
}