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Findings from Jilin University Broaden Understanding of Nanoparticles (Efficient fluorescence resonance energy transfer between oppositely charged...

July 8, 2014



Findings from Jilin University Broaden Understanding of Nanoparticles (Efficient fluorescence resonance energy transfer between oppositely charged CdTe quantum dots and gold nanoparticles for turn-on fluorescence detection of glyphosate)

By a News Reporter-Staff News Editor at Physics Week -- New research on Nanoparticles is the subject of a report. According to news reporting originating in Changchun, People's Republic of China, by VerticalNews journalists, research stated, "We designed a turn-on fluorescence assay for glyphosate based on the fluorescence resonance energy transfer (FRET) between negatively charged CdTe quantum dots capped with thioglycolic acid (TGA-CdTe-QDs) and positively charged gold nanoparticles stabilized with cysteamine (CS-AuNPs). Oppositely charged TGA-CdTe-QDs and CS-AuNPs can form FRET donor-acceptor assemblies due to electrostatic interactions, which effectively quench the fluorescence intensity of TGA-CdTe-QDs."

The news reporters obtained a quote from the research from Jilin University, "The presence of glyphosate could induce the aggregation of CS-AuNPs through electrostatic interactions, resulting in the fluorescence recovery of the quenched QDs. This FRET-based method has been successfully utilized to detect glyphosate in apples with satisfactory results. The detection limit for glyphosate was 9.8 ng/kg (3 sigma.), with the linear range of 0.02-2.0 mu g/kg. The attractive sensitivity was obtained due to the efficient FRET and the superior fluorescence properties of QDs."

According to the news reporters, the research concluded: "The proposed method is a promising approach for rapid screening of glyphosate in real samples."

For more information on this research see: Efficient fluorescence resonance energy transfer between oppositely charged CdTe quantum dots and gold nanoparticles for turn-on fluorescence detection of glyphosate. Talanta, 2014;125():385-392. Talanta can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Talanta - www.elsevier.com/wps/product/cws_home/525438)

Our news correspondents report that additional information may be obtained by contacting J.J. Guo, Jilin University, Lab Nutr & Funct Food, Changchun 130062, People's Republic of China. Additional authors for this research include Y. Zhang, Y.L. Luo, F. Shen and C.Y. Sun.

Keywords for this news article include: Asia, Changchun, Quantum Dots, Nanotechnology, Quantum Physics, Gold Nanoparticles, Emerging Technologies, People's Republic of China

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


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Source: Physics Week


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