Effect of Micelle Size on the Dielectric Relaxation and Dynamic Behavior of Reverse Micelles Using the Open-Ended Coaxial Line Technique

2020 ◽  
Vol 59 (9) ◽  
pp. 562-586
Author(s):  
Rim Ghabri ◽  
Ghazi Kassab ◽  
Abdelatif Belhadj Mohamed
Keyword(s):  
Dielectric Relaxation ◽  
Dynamic Behavior ◽  
Reverse Micelles ◽  
Coaxial Line ◽  
Micelle Size

Improvement of monodispersity and shape symmetry of silica shell for PbS quantum dots by introducing surface silanization and adjusting reverse micelle size

2021 ◽  
Author(s):  
Kohki MUKAI ◽  
Kosuke Ikeda ◽  
Reo Hatta
Keyword(s):  
Reverse Micelle ◽  
Reverse Micelles ◽  
Silica Coating ◽  
Silica Shell ◽  
Raw Material ◽  
Shell Formation ◽  
Shell Size ◽  
Surface Control ◽  
Micelle Size ◽  
Pbs Quantum Dots

Abstract Increasing the thickness of the quantum dot silica coating layer reduces monodispersity and shape symmetry. This paper reports three effective ways to solve this problem and achieve a large silica-coated QDs, i.e., proper silanization on the QD surface, control of reverse micelle size by adjusting the amount of QD solvent, and two-step formation of silica shell. Proper substitution of ligands on the QD surface in the early stages of silica shell formation was important for uniform coating reaction. An amount of toluene as QD solvent determined the size of reverse micelles during the silica shell formation. There was an optimum combination of inverse micelle size and silica shell size to obtain silica-coated QDs with good monodispersity and high shape symmetry. We succeeded in growing the thick silica shell with expanding reverse micelle size by additionally supplying toluene with the raw material using the optimum silica-coated QDs as growth nucleus

Characterization of cholesterol oxidase activity in AOT-isooctane reverse micelles and its dependence on micelle size

1989 ◽  
Vol 11 (4) ◽  
pp. 237-242 ◽  
Author(s):  
Roque Bru ◽  
Alvaro S�nchez-Ferrer ◽  
Francisco Garc�a-Carmona
Keyword(s):  
Oxidase Activity ◽  
Reverse Micelles ◽  
Cholesterol Oxidase ◽  
Micelle Size

scholarly journals Application of active-phase plot to the kinetic analysis of lipoxygenase in reverse micelles

1992 ◽  
Vol 288 (3) ◽  
pp. 1011-1015 ◽  
Author(s):  
M Perez-Gilabert ◽  
A Sanchez-Ferrer ◽  
F Garcia-Carmona
Keyword(s):  
Reverse Micelles ◽  
Octadecadienoic Acid ◽  
Active Phase ◽  
Enzyme Concentration ◽  
Enzymic Activity ◽  
Relative Volume ◽  
Soya Bean ◽  
Molar Ratio ◽  
Complex Activity ◽  
Micelle Size

A new plot for explaining the complex expression of the enzymic activity in reverse micelles has been developed as an extension of the theoretical model described by our group [Bru, Sánchez-Ferrer & García-Carmona (1990) Biochem. J. 268, 679-684]. The plot describes the changes in the relative volume, amount of enzyme (mumoles), enzyme concentration (microM) and substrate concentration (microM) in the phase where the enzyme is active. To illustrate the usefulness of this plot, the complex activity of soya bean lipoxygenase in reverse micelles acting on its interfacial substrate, octadecadienoic acid, was studied. It showed the key parameters ruling the activity profiles of lipoxygenase with respect to micelle size (omega 0), micelle concentration (theta) and the substrate/surfactant molar ratio (rho), which have never been described before.

Aquation of α-cis-[CoCl2(edda)]- and of β-cis-[CoCl2(trien)]+ in cationic and anionic reverse micelles

2005 ◽  
Vol 2005 (1) ◽  
pp. 18-20 ◽  
Author(s):  
Frederik Fusek ◽  
Ol'ga Grančičová ◽  
Dieter Lath
Keyword(s):  
Reverse Micelles ◽  
Reaction Rate ◽  
Molar Ratio ◽  
Confined Water ◽  
Micelle Size

The aquation of α-cis-[CoCl2(edda)]- and of β-cis-[CoCl2(trien)]+ has been studied in reverse micelles of water/AOT/n-heptane and water/CTAB/n-heptane+CHCl3 for various concentrations of water and AOT at 298.1 K. The reaction rate depends on the molar ratio W as well as on the concentration of AOT. These results demonstrate the important effect of micelle size as well as of structure and state of confined water in the aquation rate.

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