Silver nanoparticles with different sizes have been prepared by microemulsion and have been surface-modified with C12H25SH.Electron spin resonance results indicate that there exist some kinds of surface local paramagn...Silver nanoparticles with different sizes have been prepared by microemulsion and have been surface-modified with C12H25SH.Electron spin resonance results indicate that there exist some kinds of surface local paramagnetic sites in capped Ag nanoparticles,which leads to the relation between electron spin resonance parameters and particle size deviating from Kawabata's description.Thereis a strong interaction between nanosilver and chloroform.The smaller the particles,the stronger the interaction.Transmission electron microscopy and ultravilolet-visible absorption spectra confirmed that Ag nanoparticles are well dispersed in chloroform,implying that a good dispersity of Ag nanoparticles in polymers could be obtained by means of solution mixing by using chloroform as the solvent.展开更多
基金Supported by the Foundation of the Ministry of Education of China for the Excellent Youth Scholars,and the Key Programs of the Ministry of Education of China under Grant Nos.98069,99198。
文摘Silver nanoparticles with different sizes have been prepared by microemulsion and have been surface-modified with C12H25SH.Electron spin resonance results indicate that there exist some kinds of surface local paramagnetic sites in capped Ag nanoparticles,which leads to the relation between electron spin resonance parameters and particle size deviating from Kawabata's description.Thereis a strong interaction between nanosilver and chloroform.The smaller the particles,the stronger the interaction.Transmission electron microscopy and ultravilolet-visible absorption spectra confirmed that Ag nanoparticles are well dispersed in chloroform,implying that a good dispersity of Ag nanoparticles in polymers could be obtained by means of solution mixing by using chloroform as the solvent.
