TY - JOUR
T1 - Aggregate transition from nanodisks to equilibrium among vesicles and disks
AU - Hao, Jingcheng
AU - Yuan, Zaiwu
AU - Liu, Weimin
AU - Hoffmann, Heinz
PY - 2004/12/16
Y1 - 2004/12/16
N2 - A dilute, salt-free cationic/anionic/nonionic surfactant system was prepared. The cationic surfactant is derived from a zwitterionic tetradecyldimethylamine oxide (C14DMAO) charged by a strongly acidic anionic surfactant Texapon N70-H [CH3(CH2), 11(CH2CH2O)2.5SO3H]. The aggregate transition from nanodisks to the coexistence of disks and unilamellar vesicles to the equilibrium among disks, unilamellar vesicles, and multilamellar vesicles with polydisperse size distributions was observed by freeze-fracture transmission electron microscopy (FF-TEM) in the dilute, salt-free cationic/anionic/nonionic surfactant mixtures. At equilibrium, dynamic laser light scattering (DLLS) measurements show three peaks, which are attributed to the nanodisks, unilamellar vesicles, and multilamellar vesicles, respectively. Control and optimization of self-assembled aggregates under such experimental conditions should allow the realization and applications of novel nanostructures.
AB - A dilute, salt-free cationic/anionic/nonionic surfactant system was prepared. The cationic surfactant is derived from a zwitterionic tetradecyldimethylamine oxide (C14DMAO) charged by a strongly acidic anionic surfactant Texapon N70-H [CH3(CH2), 11(CH2CH2O)2.5SO3H]. The aggregate transition from nanodisks to the coexistence of disks and unilamellar vesicles to the equilibrium among disks, unilamellar vesicles, and multilamellar vesicles with polydisperse size distributions was observed by freeze-fracture transmission electron microscopy (FF-TEM) in the dilute, salt-free cationic/anionic/nonionic surfactant mixtures. At equilibrium, dynamic laser light scattering (DLLS) measurements show three peaks, which are attributed to the nanodisks, unilamellar vesicles, and multilamellar vesicles, respectively. Control and optimization of self-assembled aggregates under such experimental conditions should allow the realization and applications of novel nanostructures.
UR - http://www.scopus.com/inward/record.url?scp=10944229216&partnerID=8YFLogxK
U2 - 10.1021/jp0483501
DO - 10.1021/jp0483501
M3 - 文章
AN - SCOPUS:10944229216
SN - 1520-6106
VL - 108
SP - 19163
EP - 19168
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
IS - 50
ER -