News Column

Investigators at National Cheng Kung University Report Findings in Materials Science

May 6, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Researchers detail new data in Materials Science. According to news reporting from Tainan, Taiwan, by VerticalNews journalists, research stated, "Magnetic and fluorescent bifunctionalized Janus particles were fabricated via sequential particle embedding and surface modifications. The two hemispherical surfaces of a 500 nm silica particle were separately functionalized with Fe3O4 nanoparticles and coumarin dye molecules."

The news correspondents obtained a quote from the research from National Cheng Kung University, "The Fe3O4 hemisphere exhibited magnetically driven particle orientation and alignment, whereas the coumarin hemisphere served as an anisotropic emission indicator. The photoluminescence of these orientated and solidified Janus particles revealed anisotropic emission contrast as high as 40% between the magnet-aspect and the dye-aspect excitations. The dynamic anisotropic emission of the bifunctionalized Janus suspension under magnetic manipulation also revealed a nonsynchronized bulk correlation time that was much slower than that of an individual 500 nm particle. Under a static magnetic field, the suspended Janus particles assembled into a grape-like bunch, with random particle orientation."

According to the news reporters, the research concluded: "Unlike their microscale counterparts, the submicrometer magnetic Janus particles were less sensitive to gravity and more vulnerable to particle particle interactions."

For more information on this research see: Assembly and Manipulation of Fe3O4/Coumarin Bifunctionalized Submicrometer Janus Particles. ACS Applied Materials & Interfaces, 2014;6(6):4338-4345. 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 journalists report that additional information may be obtained by contacting Y.C. Chao, National Cheng Kung University, Dept. of Mat Sci & Engn, Tainan 70101, Taiwan. Additional authors for this research include W.H. Huang, K.M. Cheng and C.S. Kuo.

Keywords for this news article include: Asia, Tainan, Taiwan, Materials Science

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Source: Journal of Technology

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