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@ARTICLE{Schmutzler:859419,
author = {Schmutzler, Tilo and Schindler, Torben and Goetz, Klaus and
Appavou, Marie-Sousai and Lindner, Peter and Prevost,
Sylvain and Unruh, Tobias},
title = {{C}oncentration dependent morphology and composition of n
-alcohol modified cetyltrimethylammonium bromide micelles},
journal = {Journal of physics / Condensed matter Condensed matter},
volume = {30},
number = {49},
issn = {1361-648X},
address = {Bristol},
publisher = {IOP Publ.80390},
reportid = {FZJ-2019-00278},
pages = {495001 -},
year = {2018},
abstract = {Cetyltrimethylammonium bromide (CTAB) is one of the most
commonly used surfactants in nanoparticle synthesis and
stabilization. Usually, CTAB is used in high concentrations
besides co-surfactants leading to well defined products but
the complex mesoscopic CTAB structures stay mostly unknown.
N-alcohols for instance are widely used co-surfactants which
modify the properties of native CTAB dispersions. In this
paper we report about a detailed structure analysis of
n-alcohol modified CTAB micelles. In particular, n-pentanol
and n-hexanol exhibit a significantly different influence on
the size, shape and composition of CTAB micelles. Using a
combination of small-angle x-ray spectroscopy (SAXS) and
neutron scattering spectroscopy (SANS), we applied a method
for a complete structural characterization of such micelles.
The incorporation of n-pentanol into CTAB micelles generally
does not influence the morphology but enhances the number of
micelles due to the volume of the added alcohol. N-hexanol,
however, leads to an elongation of the micelles as a
function of its concentration. It was found by extended
contrast variation measurements that this difference is
caused by a different distribution of the alcohols between
the micellar core and shell. N-pentanol molecules are
generally located at the core–shell interface of the CTAB
micelles with not only the head group but also two
additional methylene bridging groups located in the micellar
shell. This leads to an increase of its effective head group
volume. In comparison, in n-hexanol modified micelles the
whole alkyl chain is located within the micellar core. The
detailed structure for n-alcohol modified CTAB micelles is
described herein for the first time. The knowledge of the
structural details found is indispensable for an in-depth
understanding of CTAB–n-alcohol–water interfaces in
general which is relevant for the synthesis of many
functional nanostructures like mesoporous silica and gold or
silver nanoparticles.},
cin = {JCNS-FRM-II / Neutronenstreuung ; JCNS-1 / JCNS-2},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30426969},
UT = {WOS:000450250000001},
doi = {10.1088/1361-648X/aae9c3},
url = {https://juser.fz-juelich.de/record/859419},
}