News Column

Reports from Annamalai University Advance Knowledge in Nanoparticles

June 17, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Nanoparticles are presented in a new report. According to news reporting from Tamil Nadu, India, by NewsRx journalists, research stated, "In the present study, an attempt has been made for characterization and synthesis of pure and Ni-doped alpha-Fe2O3 (hematite) nanoparticles by chemical precipitation method. The synthesized products have been studied by X-ray diffraction (X-RD), Fourier transform infrared (FTIR) spectroscopy, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), vibrating sample magnetometer (VSM) and scanning electron microscopy (SEM) techniques."

The news correspondents obtained a quote from the research from Annamalai University, "The estimated average diameter of alpha-Fe2O3 nanoparticles were calculated by using the Debye-Scherrer equation and established as 31 nm. SEM micrographs showed the surface morphology as well as structures and particles distributions of synthesized samples. The UV-Vis DRS showed the indirect and direct band gap energies of pure and Ni-doped alpha-Fe2O3, these were reduced from 1.9847 to 1.52 eV and 2.0503 to 1.76 eV respectively. This result suggested the dopant enhanced the semiconducting behavior of iron oxide nanoparticles to an extent proportional to its nickel doped in the alpha-Fe2O3. Further, the magnetic properties of the pure and doped samples were investigated by vibrating sample magnetometer (VSM) and evaluated the information of pure and doped samples exhibited saturated hysteresis loop at room temperature, which is indicating that the weak ferromagnetism in nature of our synthesized samples. In addition, it has been found from the magnetization hysteresis curves of Ni-doping, resulting from increased the saturation of magnetization and reduced the coercivity of used samples."

According to the news reporters, the research concluded: "Therefore, the present study showed the reduction in band gap energies and coercive field for alpha-Fe2O3 nanoparticles due to nickel doped."

For more information on this research see: Characterizations of diverse mole of pure and Ni-doped alpha-Fe2O3 synthesized nanoparticles through chemical precipitation route. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 2014;128():69-75. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England (see also Nanoparticles).

Our news journalists report that additional information may be obtained by contacting S. Sivakumar, Annamalai Univ, Dept. of Phys, Annamalainagar 608002, Tamil Nadu, India. Additional authors for this research include D. Anusuya, C.P. Khatiwada, J. Sivasubramanian, A. Venkatesan and P. Soundhirarajan.

Keywords for this news article include: Asia, India, Tamil Nadu, Nanotechnology, Emerging Technologies

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Source: Life Science Weekly

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