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Researchers from Jilin University Describe Findings in Nanocrystals (NaYF4:Yb,Tm nanocrystals and TiO2 inverse opal composite films: a novel device...

August 6, 2014



Researchers from Jilin University Describe Findings in Nanocrystals (NaYF4:Yb,Tm nanocrystals and TiO2 inverse opal composite films: a novel device for upconversion enhancement and solid-based sensing of avidin)

By a News Reporter-Staff News Editor at Biotech Week -- Fresh data on Nanocrystals are presented in a new report. According to news reporting originating from Changchun, People's Republic of China, by NewsRx correspondents, research stated, "Upconversion luminescence (UCL) detection based on rare-earth doped upconversion nanocrystals (UCNCs) as probes has been proved to exhibit a large anti-Stokes shift, no autofluorescence from biological samples, and no photobleaching. However, it is still a challenge to achieve a stable, reproducible solid-based UCL biosensor because of ineffective UCL of the UCNCs."

Our news editors obtained a quote from the research from Jilin University, "In this work, we fabricated TiO2 inverse opal photonic crystals (IOPCs)/NaYF4:Yb(3+),Tm(3+) (Er(3+)) UCNC composite films, which can tremendously improve the overall UCL of Tm(3+) as high as 43-fold. Based on the fluorescence resonance energy transfer (FRET) and the specific interaction between biotin and avidin, a novel solid-based UC biosensor is presented for sensing avidin. This solid-based detection system is convenient for detection, and also can offer two parameters for detecting trace amounts of avidin, namely, the emission intensity and the fluorescence decay time. The sensor has a high sensitivity of 34 pmol(-1), a good linear relationship of 0.996 and a low detection limit of 48 pmol."

According to the news editors, the research concluded: "It also exhibits excellent long-time photostability, and the absence of autofluorescence, and thus may have great potential for versatile applications in biodetection."

For more information on this research see: NaYF4:Yb,Tm nanocrystals and TiO2 inverse opal composite films: a novel device for upconversion enhancement and solid-based sensing of avidin. Nanoscale, 2014;6(11):5859-70. (Royal Society of Chemistry - www.rsc.org/; Nanoscale - pubs.rsc.org/en/journals/journalissues/nr)

The news editors report that additional information may be obtained by contacting S. Xu, State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People's Republic of China. Additional authors for this research include W. Xu, Y. Wang, S. Zhang, Y. Zhu, L. Tao, L. Xia, P. Zhou and H. Song (see also Nanocrystals).

Keywords for this news article include: Asia, Changchun, Biosensing, Bioengineering, Bionanotechnology, Nanobiotechnology, 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: Biotech Week


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