Ghosh, Moumita and Sampathkumaran, E. V. and Rao, C. N. R. (2005) Synthesis and Magnetic Properties of CoO Nanoparticles. CHEMISTRY OF MATERIALS, 17 (9). pp. 2348-2352.
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Pure CoO nanoparticles in the 4.5−18 nm range have been prepared by the decomposition of Co(ΙΙ) cupferronate in Decalin at 270 °C under solvothermal conditions. The particles have been characterized by X-ray diffraction, transmission electron microscopy, and cognate techniques. The particles are stable because of the organic coating that occurs in situ. The organic coating is readily removed by heating the particles to 260 °C without loss of the nanoparticulate nature. Magnetic measurements reveal the presence of ferromagnetic interactions at low temperatures in the small CoO nanoparticles (<16 nm). The small nanoparticles do not exhibit a distinct antiferromagnetic transition around 300 K as the bulk sample but instead show hysteresis below a blocking temperature of 10 K.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nanomagnetics
Material Science > Nanochemistry
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||19 Jan 2009 09:41|
|Last Modified:||12 Nov 2010 15:52|
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