Synthesis temperature dependence of morphologies and properties of cobalt oxide and silicon nanocrystals  

作　　者：Akimasa KOJI Javed IQBAL Rong-Hai YU Zheng-Jun ZHANG 

机构地区：[1]Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China [2]Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-10okayama Meguro-ku, Tokyo 152-8552, Japan

出　　处：《Frontiers of Computer Science》2011年第3期311-321,共11页中国计算机科学前沿（英文版）

摘　　要：Cobalt and cobalt oxide nanocrystals were synthesized on Si substrates from aqueous cobalt nitrate [Co（NO3）2·6H2O] powder via chemical vapor deposition method. Scanning electron microscope, field emission scanning electron microscope, and transmission electron microscope observations show different morphologies, such as continuous films, nano-bars, nano-dices, and nano-strings, depending on the synthesis temperature. The crystal structure characterization was conducted using X- ray diffraction methods. Furthermore, the properties of the samples were characterized using Raman spectroscopic analysis and vibrating sample magnetometer. The morphology change was discussed in terms of synthesis environments and chemical interactions between cobalt, oxygen, and silicon.Cobalt and cobalt oxide nanocrystals were synthesized on Si substrates from aqueous cobalt nitrate [Co（NO3）2·6H2O] powder via chemical vapor deposition method. Scanning electron microscope, field emission scanning electron microscope, and transmission electron microscope observations show different morphologies, such as continuous films, nano-bars, nano-dices, and nano-strings, depending on the synthesis temperature. The crystal structure characterization was conducted using X- ray diffraction methods. Furthermore, the properties of the samples were characterized using Raman spectroscopic analysis and vibrating sample magnetometer. The morphology change was discussed in terms of synthesis environments and chemical interactions between cobalt, oxygen, and silicon.

关 键 词：cobalt oxide NANOSTRUCTURE temperature dependence magnetic property 

分 类 号：O484.1[理学—固体物理] TN304.12[理学—物理]