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Researchers from Hainan University Detail Findings in Materials Science

February 4, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Researchers detail new data in Materials Science. According to news reporting originating in Haikou, People's Republic of China, by VerticalNews journalists, research stated, "Au nanobipyramids (NBPs) are important nanostructures which attract much attention due to their unique structure, optical, and catalytic properties. The controlled synthesis of Au NBPs and corresponding mechanistic study are highly desirable for both fundamental research and practical applications."

The news reporters obtained a quote from the research from Hainan University, "Herein, we demonstrate a strategy that large sized Au decahedra with well-defined shape act as seeds for growing NBPs. Furthermore, through using different sized decahedra seeds with edge from 25 to 49 nm, various sized NBPs can be easily prepared (longitudinal length from 110 to 210 nm; transverse length from 36 to 70 nm). Our study provides hard evidence for the growth of NBPs that they Surely stem from the overgrowth on penta-twinned decahedra. Because these used large size seeds have well-defined shape and structure, the growth of the NBPs can be easily determined. Results show that the formation of NBPs is primarily determined by the molar ratio of Au3+ and Au seeds (MRAA). MRAA less than 4 only causes size enhancement and no significant shape change. In cases of MRAA higher than 4 and lower than 8, quasi-nanorods are produced. When MRAA range from 8 to 10, NBPs form and the yield is higher than 90%. The effect of reaction time and temperature also are vital to the growth of NBPs."

According to the news reporters, the research concluded: "These prepared NBPs are found to exhibit excellent surface enhanced Raman scattering (SERS) performance because of many present hotspots, edges, steps, and tips on their surfaces."

For more information on this research see: Growth of Nanobipyramid by Using Large Sized Au Decahedra as Seeds. ACS Applied Materials & Interfaces, 2013;5(24):13340-13352. ACS Applied Materials & Interfaces can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; ACS Applied Materials & Interfaces -

Our news correspondents report that additional information may be obtained by contacting G.J. Zhou, Hainan Univ, Coll Mat & Chem Engn Hainan Haikou, Haikou 570228, People's Republic of China. Additional authors for this research include Y. Yang, S.H. Han, W. Chen, Y.Z. Fu, C. Zou, L.J. Zhang and S.M. Huang.

Keywords for this news article include: Asia, Haikou, Materials Science, People's Republic of China

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Source: Journal of Technology

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