Ultrafine metal particle formation in reverse micellar systems: Effects of intermicellar exchange on the formation of particles

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Ultrafine metal particle formation in reverse micellar systems: Effects of intermicellar exchange on the formation of particles

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dc.contributor.author NATARAJAN, U en_US
dc.contributor.author HANDIQUE, K en_US
dc.contributor.author MEHRA, A en_US
dc.contributor.author BELLARE, JR en_US
dc.contributor.author KHILAR, KC en_US
dc.date.accessioned 2011-07-15T03:26:03Z en_US
dc.date.accessioned 2011-12-26T12:49:13Z en_US
dc.date.accessioned 2011-12-27T05:35:01Z
dc.date.available 2011-07-15T03:26:03Z en_US
dc.date.available 2011-12-26T12:49:13Z en_US
dc.date.available 2011-12-27T05:35:01Z
dc.date.issued 1996 en_US
dc.identifier.citation LANGMUIR, 12(11), 2670-2678 en_US
dc.identifier.issn 0743-7463 en_US
dc.identifier.uri http://dx.doi.org/10.1021/la940584g en_US
dc.identifier.uri http://dspace.library.iitb.ac.in/xmlui/handle/10054/4143 en_US
dc.identifier.uri http://hdl.handle.net/10054/4143
dc.description.abstract A modeling approach is developed to account for the important effects of intermicellar exchange on the ultrafine particle formation in reverse micelles. A set of fusion-fission schemes is specifically proposed and used for modeling intermicellar metal exchange. The dynamic effects largely differing in their time scales are decoupled using a two-staged approach. Growth of metal particles is simulated to occur through intramicellar attachment of free metal atoms from an instantaneous reduction reaction and as well as by transfer and attachment through intermicellar exchange. Simulation results predict increase in particle size with aqueous core size and total aqueous phase volume, increase in particle number density with surfactant concentration at fixed aqueous phase to surfactant molar ratio, a minimum in average particle size as a function of salt concentration, and increase in particle size polydispersity with salt concentration and aqueous core size. Low values of the order of 10(-1) are found for the number ratio of particles to micelles. All these effects have been observed experimentally. The mean core size and the critical metal nucleation number are found to be the primary influencing parameters for the final particle sizes. It is further found that the polydispersity can be controlled through proper choice of starting mixture conditions. en_US
dc.language.iso en en_US
dc.publisher AMER CHEMICAL SOC en_US
dc.subject cadmium-sulfide insitu en_US
dc.subject micro-emulsions en_US
dc.subject pyrene fluorescence en_US
dc.subject oil microemulsions en_US
dc.subject inverted micelles en_US
dc.subject kinetic-model en_US
dc.subject water en_US
dc.subject media en_US
dc.title Ultrafine metal particle formation in reverse micellar systems: Effects of intermicellar exchange on the formation of particles en_US
dc.type Article en_US


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