摘要
One-dimensional magnetic Ni Co alloy microwires with different microstructures and differently shaped building blocks including spherical particles,multilayer stacked alloy plates,and alloy flowers,have been synthesized by an external magnetic field-assisted solvothermal reaction of mixtures of cobalt(II)chloride and nickel(II)chloride in 1,2-propanediol with different NaOH concentrations.By adjusting the experimental parameters,such as precursor concentration and Ni/Co ratio,Ni Co alloy chains with uniform diameters in the range 500 nm to 1.3μm and lengths ranging from several micrometers to hundreds of micrometers can be obtained.A mechanism of formation of the one-dimensional assemblies of magnetic NiCo microparticles in a weak external magnetic fi eld is proposed.
基金
This work was supported by the National Natural Science Foundation of China(NSFC)(Grants Nos.50732006,20621061,and 20671085)
Anhui Development Fund for Talented Personnel(2005CB623601)
Anhui Education Committee(2006Z027,ZD2007004-1)
the Specialized Research Fund for the Doctoral Program(SRFDP)of Higher Education State Education Ministry,and the Partner-Group of the Chinese Academy of Sciences the Max Planck Society.
