Nanometer-sized ZnFe_(2)O_(4) particles capped with a layer of surfactant are synthesized and their optical absorption is investigated.Such capped ZnFe_(2)O_(4) particles present a strong band edge absorption in visib...Nanometer-sized ZnFe_(2)O_(4) particles capped with a layer of surfactant are synthesized and their optical absorption is investigated.Such capped ZnFe_(2)O_(4) particles present a strong band edge absorption in visible region and their energy band gap is estimated to be about 1.53eV.It is also found that the capped nanoparticles have a significant red shift of optical absorption band edge in contrast with that of uncapped ZnFe_(2)O_(4) nanoparticles,which is mainly related to the trapped and self-trapped excitons absorption resulting from an interfacial dipole layer formed on the surface of ZnFe_(2)O_(4) nanoparticles.展开更多
基金supported by the National Natural Science Foundation of China(51672202,21673170)the Technological Innovation Key Project of Hubei Province,China(2016AAA041)the Fundamental Research Funds for the Central Universities,China(WUT:2016IVA085)~~
基金supported by the National Natural Science Foundation of China(21734001,51761165023,21504066,21534003)the Department of the Navy U.S.(N00014-14-1-0580,N00014-16-1-2520)+1 种基金the Ministry of Science and Technology,China(2016YFA0200700)the Natural Science Foundation,U.S.(DMR-1507249,CBET-1639429)~~
基金Supported by the Climbing Program of National Committee of Science and Technology of China。
文摘Nanometer-sized ZnFe_(2)O_(4) particles capped with a layer of surfactant are synthesized and their optical absorption is investigated.Such capped ZnFe_(2)O_(4) particles present a strong band edge absorption in visible region and their energy band gap is estimated to be about 1.53eV.It is also found that the capped nanoparticles have a significant red shift of optical absorption band edge in contrast with that of uncapped ZnFe_(2)O_(4) nanoparticles,which is mainly related to the trapped and self-trapped excitons absorption resulting from an interfacial dipole layer formed on the surface of ZnFe_(2)O_(4) nanoparticles.