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@ARTICLE{Wang:905338,
author = {Wang, Chen-An and Yeh, Yi-Qi and Mou, Chung-Yuan and Su,
Chun-Jen and Wu, Wei-Ru and Jeng, U-Ser},
title = {{S}mall-angle-scattering resolved catanionic unilamellar
vesicles as molecule carriers},
journal = {Materials chemistry and physics},
volume = {277},
issn = {0254-0584},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2022-00606},
pages = {125435},
year = {2022},
abstract = {Structure and composition of the unilamellar vesicles (ULV)
formed with catanionic surfactant of sodium dodecylsulfate
(SDS) and cetyltrimethylammonium bromide (CTAB) are revealed
using small-angle X-ray and neutron scattering (SAXS and
SANS) and freeze-fracture-replication transmission electron
microscopy (FFR-TEM). Imaging and scattering results
consistently indicate a globular shape of the ULV, having a
core size of 48 nm and a bilayer thickness of 32 Å; the
bilayer comprises a central aliphatic shell of 24 Å,
sandwiched by two headgroup shells, each of ca. 4 Å
thickness. From the zero-angle scattering intensity ratio of
the SAXS and SANS data, a SDS/CTAB composition ratio of 3:4
for the ULV bilayer is deduced.
Poly(oxyethylene-b-oxypropylene-b-oxyethylene) (P123), a
triblock copolymer, is found to intervene into the ULV
bilayer of the catanionic surfactant in solution, leading to
successively enlarged complex ULV, as P123 concentration in
the solution increases. The ULV of SDS/CTAB is saturated
with P123-loading after a critical concertation of 0.067 mM
P123; thereafter, formation and proliferation of
constant-sized, P123-based core-shell micelles are observed
with increase of P123 concentration. A structural model of
P123-embedded ULV of the catanionic surfactant is proposed.
These results suggest a capacity and limits of using the
catanionic ULV as molecule carriers.},
cin = {JCNS-FRM-II / MLZ / JCNS-4},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)JCNS-4-20201012},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4)},
pid = {G:(DE-HGF)POF4-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000729396600005},
doi = {10.1016/j.matchemphys.2021.125435},
url = {https://juser.fz-juelich.de/record/905338},
}