Magnetic Co_3O_4 nanowires,preparation and properties  

作　　者：Mai Xia Ma Wei Meng Chen Lin Guo Jing Hong Li Chin Ping Chen Shi He Yang 

机构地区：[1]School of Chemistry and Environment,Beijing University of Aeronautics and Astronautics,Beijing 100191,China [2]'Department of Physics,Peking University,Beijing 100871,China [3]Department of Chemistry,Beijing Key Laboratory for Microanalytical Methods and Instrumentation,Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology,Tsinghua University,Beijing 100084,China [4]Department of Chemistry,The Hong Kong University of Science and Technology,Hong Kong,China [5]Faculty of Chemistry and Material Science,Langfang Teachers College,Langfang 065000,China

出　　处：《Chinese Chemical Letters》2012年第7期851-854,共4页中国化学快报（英文版）

基　　金：supported by the National Narural Science Foundation of China(Nos.10874006,11079002, 20973019 and 50825208);Specialized Research Fund for the Doctoral Program of Higher Eduction(No. 20091102110035)

摘　　要：The Co3O4 nanowires have been successfully synthesized via modified template method.The as-prepared products have been characterized by EDS,TEM and HRTEM analysis.The magnetic behavior of it is investigated by a magnetic property measurement system.The nanowires exhibit some novel magnetic properties,which are different from its bulk material.The temperature dependence curves of magnetization in zero-field-cooling and field-cooling exhibit two peaks of antiferromagnetic at blocking temperature of～23 K and～31 K,respectively.The field dependent M（H） curves of the Co_3O_4 nanowires at T = 5 and 300 K both exhibit PM properties.Moreover,the diameter of nanowires is hence determined according to the finite size effect as approximately 7-11 nm,in consistent with the characterizations by HRTEM.The Co3O4 nanowires have been successfully synthesized via modified template method.The as-prepared products have been characterized by EDS,TEM and HRTEM analysis.The magnetic behavior of it is investigated by a magnetic property measurement system.The nanowires exhibit some novel magnetic properties,which are different from its bulk material.The temperature dependence curves of magnetization in zero-field-cooling and field-cooling exhibit two peaks of antiferromagnetic at blocking temperature of～23 K and～31 K,respectively.The field dependent M（H） curves of the Co_3O_4 nanowires at T = 5 and 300 K both exhibit PM properties.Moreover,the diameter of nanowires is hence determined according to the finite size effect as approximately 7-11 nm,in consistent with the characterizations by HRTEM.

关 键 词：NANOSTRUCTURES OXIDES Magnetic properties 

分 类 号：TQ138.12[化学工程—无机化工] TB383[一般工业技术—材料科学与工程]