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@ARTICLE{Arbe:818388,
author = {Arbe, A. and Pomposo, J. A. and Moreno, A. J. and LoVerso,
F. and González-Burgos, M. and Asenjo-Sanz, I. and
Iturrospe, A. and Radulescu, A. and Ivanova, O. and
Colmenero, J.},
title = {{S}tructure and dynamics of single-chain nano-particles in
solution},
journal = {Polymer},
volume = {105},
issn = {0032-3861},
address = {Oxford},
publisher = {Elsevier Science},
reportid = {FZJ-2016-04849},
pages = {532–544},
year = {2016},
abstract = {By means of intramolecular folding/collapse of individual
polymer chains (precursors), ultra-small soft nano-objects
called single-chain nano-particles (SCNPs) can be
synthesized. Here we present a combination of scattering
techniques [small angle X-Ray and neutron scattering (SAXS
and SANS), neutron spin echo (NSE) and dynamic light
scattering (DLS)] to investigate the structure and dynamics
of SCNPs in solution and their linear precursors as
reference. Coarse-grained molecular dynamics (MD)
simulations have also been carried out to complement this
study. The application of SANS and SAXS has proved the
compaction of the macromolecules upon creation of internal
cross-links. However, the SCNPs obtained by different routes
exhibit a far from globular topology in good solvent.
Regarding the dynamics, we report on the first experimental
investigation of the dynamic structure factor of SCNPs in
solution. It reveals a clear impact of internal cross-links
through (i) a reduction of the translational diffusion
coefficient and (ii) an important slowing down of the
internal modes. The data have been analyzed in terms of
theoretical approximations based on the Zimm model. Both,
structurally and dynamically, SCNPs show striking
resemblances with intrinsically disordered proteins: similar
scaling properties reflecting sparse morphologies and an
extremely high internal friction.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000388405300057},
doi = {10.1016/j.polymer.2016.07.059},
url = {https://juser.fz-juelich.de/record/818388},
}