tailieunhanh - Báo cáo hóa học: " A Versatile Route for the Synthesis of Nickel Oxide Nanostructures Without Organics at Low Temperature"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Versatile Route for the Synthesis of Nickel Oxide Nanostructures Without Organics at Low Temperature | Nanoscale Res Lett 2008 3 255-259 DOI s11671-008-9147-z NANO EXPRESS A Versatile Route for the Synthesis of Nickel Oxide Nanostructures Without Organics at Low Temperature M. A. Shah Received 28 May 2008 Accepted 10 July 2008 Published online 25 July 2008 to the authors 2008 Abstract Nickel oxide nanoparticles and nanoflowers have been synthesized by a soft reaction of nickel powder and water without organics at 100 C. The mechanism for the formation of nanostructures is briefly described in accordance with decomposition of metal with water giving out hydrogen. The structure morphology and the crystalline phase of resulting nanostructures have been characterized by various techniques. Compared with other methods the present method is simple fast economical template-free and without organics. In addition the approach is nontoxic without producing hazardous waste and could be expanded to provide a general and convenient strategy for the synthesis of nanostructures to other functional nanomaterials. Keywords Nickel powder Soft synthesis Nanostructures Functional materials Introduction In recent years nanomaterials have steadily received growing interests as a result of their peculiar and fascinating properties and applications superior to their bulk counterparts. A wealth of interesting and new phenomenoa associated with nanostructures has been found with the best established examples including size-dependent excitation and emission. It is generally accepted that the quantum confinement of electrons by the potential well of nanometer-sized structure may provide one of the most M. A. Shah H EM Laboratory Department of Physics National Institute of Technology Deemed University Hazratbal Srinagar 190006 India e-mail shah11nit@ powerful means to control the electrical optical magnetic and thermoelectric properties of solid-state functional materials. Thus the ability to generate such minuscule structures is essential to much of modern science and .