References Ezo
Asefa, T., Yoshina-Ishii, C., MacLachlan, M. J., Ozin, G. A. New Nanocomposites Putting Organic Function 'Inside' the Channel Walls of Periodic Mesoporous Silica, J. Mater. Chem. 10, 1751 2000 . Babushkin, V. I., Matveyev, G. M., Mchedlov-Petrossyan, O. P. Thermodynamics of Silicates Springer-Verlag 1985 . Beck, J. S., Vartuli, J. C., Roth, W. J., Leonowicz, M. E., Kresge, C. T., Schmitt, K. D., Chu, C. T. W., Olson, D. H., Sheppard, E. W., McCullen, S. B., Higgins, J. B., Schlenker, J. L. A...
References Kcf
Abe, M., Ogino, K. Solution Properties of Anionic-Nonionic Mixed Surfactant Systems, Surfactant Science Series, Vol. 46 Mixed Surfactant Systems , pp. 1-21 Marcel Dekker 1992 . Alexandridis, P., Lindman, B., eds. Amphiphilic Block Copolymers Self-assembly and Applications Elsevier 2000 . Almgren, M. Kinetics of Excited State Processes in Micellar Media, Surfactant Science Series , Vol. 38 Kinetics and Catalysis in Microheterogeneous Systems , pp. 63-113 Marcel Dekker 1991 . Ash, M., Ash, I....
General Scheme For Selfassembly Process
In the previous section, the balance between the distinctive but cooperative three classes of forces has been proposed for the formation of self-assembled aggregates. This general scheme can encompass a variety of self-assembly building units with the length scale ranging from atomic to colloidal. Since the self-assembly process can occur in such a wide range of length scale 107 difference of order from Angstr m to centimeter and the same types of forces are governing the process, the...
Exercise 31
Describe qualitatively the condition that can induce the spherical micelle of DTAB dodecyltrimethyl ammonium bromide to change into a rod-shaped micelle based on the packing parameter consideration. Assume that the g-value for the spherical micelle is 1 3 and for the rod-shaped micelle is 1 2. Solvent is water and DTAB concentration is fixed. Solution Since v and l are fixed, the only way to increase the g-value from 1 3 to 1 2 is to decrease ao. This can be achieved by the reduction of...
Asymmetric Structure of Building Units
Asymmetric packing of building units is also induced by the molecular or structural chirality that originates in the asymmetric geometry of the building units, and not from the presence of chiral carbon or centers. The packing mode is the same as for the chiral building units in Figure 7.3b. A typical class of this type of molecule is helicene Balaban, 2003 . These are mainly orthocondensed, nonplanar polycyclic aromatic molecules. The steric repulsion between the nearest bulky aromatic groups...
Multicomponent Micelles
As shown in Figure 3.9, a multicomponent or simply mixed micelle is a micelle that is formed through the self- assembly of more than two different kinds of surfactant molecules Abe and Ogino, 1992 . In most cases, the composition of monomers between the different surfactant molecules is directly related to the composition in the mixed micelles. Thus, the pseudo-phase separation model that can follow the key thermodynamics quantities is more suitable for the description of the formation of mixed...
General Scheme For The Formation Of Selfassembled Aggregates
Based on the above discussion, the general scheme for the self-assembly process that can encompass the length scale from atomic to colloidal can be drawn. Figure 1.2 shows the schematics. Self- assembly is the force balance process between three classes of forces attractive driving, repulsive opposition, and directional force. Directional force can be considered functional force in the sense that it is also responsible for the functionality. When only the first two classes of forces are in...
Selfassembly Through Force Balance
Surfactant self-assembly is often called micellization the process for the formation of micelles. With the view of the forces acting on this process, it is actually a process toward the delicate balance between the attractive and repulsive intermolecular forces. Attractive forces directly act on surfactant molecules to bring them close together, while repulsive forces act against the molecules. Hence, the former can be defined as the driving force for the micellization, and the latter as the...