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@ARTICLE{Dubbert:186435,
author = {Dubbert, Janine and Honold, Tobias and Pedersen, Jan Skov
and Radulescu, Aurel and Drechsler, Markus and Karg,
Matthias and Richtering, Walter},
title = {{H}ow {H}ollow {A}re {T}hermoresponsive {H}ollow
{N}anogels?},
journal = {Macromolecules},
volume = {47},
number = {24},
issn = {1520-5835},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2015-00511},
pages = {8700 - 8708},
year = {2014},
abstract = {A main challenge in colloid science is the development of
smart delivery systems that store and protect actives from
degradation and allow release in response to an external
stimulus like temperature. Hollow nanogel capsules made of
temperature-sensitive polymers are particularly promising
materials. The stimuli-sensitive void size, shell thickness,
and permeability determine cargo storage and its release
behavior. Thus, determination and control of these
morphological parameters are of outmost relevance for the
design of new, functional drug delivery vehicles. Here we
investigate quantitatively void size and shell thickness of
hollow nanogels at different states of swelling by means of
small-angle neutron scattering (SANS) employing contrast
variation. We demonstrate the structure-sensitivity dilemma:
hollow nanogels with a slightly cross-linked shell reveal
distinct temperature sensitivity but possess nearly no void
$(14\%$ of the initial core volume) and are thus hardly
“hollow”. Nanogels with a stiff shell are indeed hollow
(albeit with smaller void as compared to the core size of
the template) but less temperature sensitive.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
ICS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)ICS-1-20110106},
pnm = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
(POF2-54G24)},
pid = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000347138300026},
doi = {10.1021/ma502056y},
url = {https://juser.fz-juelich.de/record/186435},
}