News Column

Study Data from Hokkaido University Update Understanding of Nanotechnology

January 31, 2014



By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanotechnology have been published. According to news reporting out of Hokkaido, Japan, by NewsRx editors, research stated, "ZnO nanoflowers, amorphous ZnO nanospheres and metallic Zn particles have been controllably synthesized using solution plasma technique at different reaction temperatures and agitation. X-ray diffractometry (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that ZnO nanoflowers were synthesized at a high electrolyte temperature in a static system (no agitation)."

Our news journalists obtained a quote from the research from Hokkaido University, "On the other hand, the use of agitation led to both amorphous ZnO nanospheres and spherical metallic zinc particles. The excitation temperature of plasma was 4000 K from the light emission using spectrometer. From these result, melting and vaporization of the Zn electrode produced particles. ZnO nanoflowers grew on the surface of spherical particles by precipitation from Zn(OH)(4)(2-) ions. Photoluminescence (PL) measurement indicated that as-synthesized ZnO flowers and amorphous ZnO nanospheres showed strong green emissions, which was attributable to their surface defect structure. Furthermore, the annealing at 700 degrees C led to a reduction in green emissions, attributable to a decrease in the number of surface defects."

According to the news editors, the research concluded: "Photocatalytic activity of ZnO nanoflowers was increased by the annealing."

For more information on this research see: Solution plasma synthesis of ZnO flowers and their photoluminescence properties. Applied Surface Science, 2014;290():419-424. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)

Our news journalists report that additional information may be obtained by contacting G. Saito, Hokkaido University, Fac Engn, Sapporo, Hokkaido 0608628, Japan. Additional authors for this research include Y. Nakasugi, T. Yamashita and T. Akiyama (see also Nanotechnology).

Keywords for this news article include: Asia, Japan, Hokkaido, Nanophere, Nanosphere, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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