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Data on Quantum Dots Reported by Researchers at Washington University

February 28, 2014

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Quantum Dots have been published. According to news originating from St. Louis, Missouri, by NewsRx correspondents, research stated, "Quaternary semiconductor quantum dots (QDs) containing less toxic elements are receiving increasing attention because of their promising applications in solar cells, light-emitting diode (LED), and biological labeling. Despite its advantages, the quaternary system is more complex than the binary and ternary analogues."

Our news journalists obtained a quote from the research from Washington University, "This is reflected in the difficulty to control the size, size distribution, elemental composition, and optical properties of quaternary QDs, especially in aqueous medium. In this work, we have synthesized new aqueous quaternary Zn-Ag-In-S (ZAIS) QDs with tunable photoluminescence (PL) for the first time, giving the highest PL quantum yield (QY) of 30%, which is close to those of the conventional well-developed aqueous II-VI QDs. Most importantly, three unique spectral shifts depending on precursor S/In ratio were observed in this quaternary system. The spectral were characterized by diverse analytical methods to systematically establish distinct features of the quaternary nanomaterials."

According to the news editors, the research concluded: "The results demonstrate the potential utility of this new water-soluble system in fundamental and applied researches with quaternary QDs."

For more information on this research see: Highly luminescent water-soluble quaternary Zn-Ag-In-S quantum dots and their unique precursor S/In ratio-dependent spectral shifts. Journal of Luminescence, 2014;146():364-370. Journal of Luminescence can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Journal of Luminescence -

The news correspondents report that additional information may be obtained from D.W. Deng, Washington University, Sch Med, Dept. of Radiol, St Louis, MO 63110, United States. Additional authors for this research include L.Z. Qu, Z.Q. Cheng, S. Achilefu and Y.Q. Gu (see also Quantum Dots).

Keywords for this news article include: Missouri, St. Louis, Quantum Dots, United States, Nanotechnology, Quantum Physics, Emerging Technologies, North and Central America

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Source: Science Letter

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