Wormlike Micelles Formed by Synergistic Self-Assembly in Mixtures of Anionic and Cationic Surfactants

Langmuir ◽  
2002 ◽  
Vol 18 (10) ◽  
pp. 3797-3803 ◽  
Author(s):  
Srinivasa R. Raghavan ◽  
Gerhard Fritz ◽  
Eric W. Kaler
Keyword(s):  
Self Assembly ◽  
Cationic Surfactants ◽  
Wormlike Micelles ◽  
Anionic And Cationic Surfactants

Morphology Controlled Nanostructure of Zinc Porphyrin

2013 ◽  
Vol 562-565 ◽  
pp. 1314-1318
Author(s):  
Jun Jie Li ◽  
Chang Jun Hou ◽  
Zhi Fei Li ◽  
Huan Bao Fa ◽  
Mei Yang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Fluorescence Spectroscopy ◽  
Aqueous Solutions ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Zinc Porphyrin ◽  
Assembly Method ◽  
Fluorescent Spectra ◽  
Anionic And Cationic Surfactants ◽  
Surfactant Assisted

We have shown that various Zinc porphyrin-based nanostructures can be easily synthesized by a surfactant-assisted self-assembly method, where nonionic, anionic and cationic surfactants are employed. It was found that tuning the type of surfactant offered an alternative to promote the formation of Zinc porphyrin nanostructure with different morphologies in aqueous solutions. As-prepared nano-scale self-assemblies, including disc-shaped, ellipsoid, square and quadrangular pyramidal nanoparticles, were investigated in solution via UV/vis, fluorescence spectroscopy and SEM microscopy. The different UV/vis as well as fluorescent spectra between nano-porphyrin and its monomer further conformed that the nano-crystallization of porphyrin would result in novel optical properties differing from the single subunits.

Probing the Dynamic Self-Assembly Behaviour of Photoswitchable Wormlike Micelles in Real Time

2018 ◽  
Author(s):  
Elaine A. Kelly ◽  
Judith E. Houston ◽  
Rachel Evans
Keyword(s):  
Real Time ◽  
Absorption Spectroscopy ◽  
Self Assembly ◽  
Uv Light ◽  
Wormlike Micelles ◽  
Tetraethylene Glycol ◽  
Light Illumination ◽  
First Time ◽  
Dependent Processes

Understanding the dynamic self-assembly behaviour of azobenzene photosurfactants (AzoPS) is crucial to advance their use in controlled release applications such as<i></i>drug delivery and micellar catalysis. Currently, their behaviour in the equilibrium <i>cis-</i>and <i>trans</i>-photostationary states is more widely understood than during the photoisomerisation process itself. Here, we investigate the time-dependent self-assembly of the different photoisomers of a model neutral AzoPS, <a>tetraethylene glycol mono(4′,4-octyloxy,octyl-azobenzene) </a>(C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>) using small-angle neutron scattering (SANS). We show that the incorporation of <i>in-situ</i>UV-Vis absorption spectroscopy with SANS allows the scattering profile, and hence micelle shape, to be correlated with the extent of photoisomerisation in real-time. It was observed that C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>could switch between wormlike micelles (<i>trans</i>native state) and fractal aggregates (under UV light), with changes in the self-assembled structure arising concurrently with changes in the absorption spectrum. Wormlike micelles could be recovered within 60 seconds of blue light illumination. To the best of our knowledge, this is the first time the degree of AzoPS photoisomerisation has been tracked <i>in</i><i>-situ</i>through combined UV-Vis absorption spectroscopy-SANS measurements. This technique could be widely used to gain mechanistic and kinetic insights into light-dependent processes that are reliant on self-assembly.

Self-assembly of the mixed systems based on cationic surfactants and different types of polyanions: The influence of structural and concentration factors

2018 ◽  
Vol 272 ◽  
pp. 892-901 ◽  
Author(s):  
E.A. Vasilieva ◽  
D.A. Samarkina ◽  
G.A. Gaynanova ◽  
S.S. Lukashenko ◽  
D.R. Gabdrakhmanov ◽  
...  
Keyword(s):  
Self Assembly ◽  
Cationic Surfactants ◽  
Different Types ◽  
Concentration Factors ◽  
Mixed Systems

Interaction of anionic and cationic surfactants with salivary pellicles formed at solid surfacesin vitro

Biofouling ◽  
1992 ◽  
Vol 5 (4) ◽  
pp. 277-286 ◽  
Author(s):  
Nikolaos Vassilakos ◽  
Thomas Arnebrant ◽  
Per‐Olof Glantz
Keyword(s):  
Cationic Surfactants ◽  
Anionic And Cationic Surfactants

Synthesis of superfine paramagnetic nickel particles using anionic and cationic surfactants

2019 ◽  
Vol 6 (10) ◽  
pp. 108001 ◽  
Author(s):  
M Khizar Shafique ◽  
Tahir Muhmood ◽  
S Lin ◽  
Hu Xiaobin ◽  
Sehrish Gull
Keyword(s):  
Cationic Surfactants ◽  
Nickel Particles ◽  
Anionic And Cationic Surfactants

Transition from Micelles to Vesicles in Aqueous Mixtures of Anionic and Cationic Surfactants

Langmuir ◽  
1997 ◽  
Vol 13 (21) ◽  
pp. 5531-5538 ◽  
Author(s):  
Olle Söderman ◽  
Kathleen L. Herrington ◽  
Eric W. Kaler ◽  
David D. Miller
Keyword(s):  
Cationic Surfactants ◽  
Aqueous Mixtures ◽  
Anionic And Cationic Surfactants
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