Silvernanoparticleswithdifferentdiametersweresynthesizedbymicroemulsionmethod ,inwhichtheeffectoftolueneorcyclohexaneasanoilphaseontheparticlesizeanditsdistributionwasdetected .Silvernanoparticleswerenear spherical,bothmulticrystalsandtwinswereobserved.Latticedeformationsexistedindifferentdegreesbecausetheinterplanarspacedwasincreased.Thefluorescencespectrafordifferentsizesilvernanoparticlesdispersedinorganicsolventsweremeasured.Therearethreeemissionpeaksforsilvernanoparticles chloroformsystems,whilenofluorescenceemissionwasfoundwhensilvernanoparticlesdispersedintoluene .Thefluorescenceintensityvarieswithparticlesizeofthesilvernanoparticles,whichoriginatesfromAg2 ,Ag3 clustersonthesilverparticlesurfaceproducedbytheinteractionbetweensilverandchloroformunderUVradiation .Thereactivityandthenumberofsurfacereactivecentersvarywithsilverparticlesize,resultinginthedifferentfluorescencephenomena.