Microemulsions intermicellar exchange

Bagwe RP, Khilar KC (2000) Effects of intermicellar exchange rate on the formahon of silver nanoparticles in reverse microemulsions of AOT. Langmuir 16 905-910... 

ForCaCO, particles in W/O microemulsions of hexaethylene glycol dodecyl ether, however, the values of Nm/Np lie between 0.044 and 0.28, indicating that the particles form by the destruction of micelle-solubilizing aqueous Ca(OH)2 rather than by the intermicellar exchange process (5). In the case of the formation of CaCO-) particles in the Ca salt of Aerosol OT-cyclohexane system, as seen in Table 7.2.2, the particles... 

Abstract Monte Carlo simulations were carried out to study the different stmctures showed by bimetallic nanoparticles synthesized in microemulsions. It is observed that the difference in reduction rates of both metals is not the only parameter to determine the metals segregation, playing the interdroplet channel size a relevant role. The reduction rates difference determines nanoparticle structure only in two extreme cases when both reactions take place at the same rate a nanoalloy structure is always obtained if both reactions have very different rates, the nanoparticle shows a core-shell structure. But in the large interval between both extreme cases, the nanoparticle structure is strongly dependent on the intermicellar exchange, which is mainly determined by the surfactant film flexibility, and on reactants concentration. This result is very promising for the preparation of bimetallic nanoparticles with a given structure. 

Quintilian, S., Tojo, C., Blanco, M.C., and Lopez-Quintela, M.A. 2001. Effects of the intermicellar exchange on the size control of nanoparticles synthesized in microemulsions. Langmuir, 17, 7251-7254. 

---