By a News Reporter-Staff News Editor at Energy Weekly News -- Data detailed on Nanocrystals have been presented. According to news originating from Boulder, Colorado, by VerticalNews correspondents, research stated, "Upconversion of infrared radiation into visible light has been investigated for applications in photovoltaics and biological imaging. However, low conversion efficiency due to small absorption cross-section for infrared light (Yb3+), and slow rate of energy transfer (to Er3+ states) has prevented application of upconversion photoluminescence (UPL) for diffuse sunlight or imaging tissue samples."
Our news journalists obtained a quote from the research from the University of Colorado, "Here, we utilize resonant surface plasmon polaritons (SPP) waves to enhance UPL in doped-lanthanide nanocrystals. Our analysis indicates that SPP waves not only enhance the electromagnetic field, and hence weak Purcell effect, but also increase the rate of resonant energy transfer from Yb3+ to Er3+ ions by 6 fold. While we do observe strong metal mediated quenching (14-fold) of green fluorescence on flat metal surfaces, the nanostructured metal is resonant in the infrared and hence enhances the nanocrystal UPL."
According to the news editors, the research concluded: "This strong Coulombic effect on energy transfer can have important implications for other fluorescent and excitonic systems too."
For more information on this research see: Plasmon-Enhanced Energy Transfer for Improved Upconversion of Infrared Radiation in Doped-Lanthanide Nanocrystals. Nano Letters, 2014;14(1):101-106. Nano Letters can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Nano Letters - www.pubs.acs.org/journal/nalefd)
The news correspondents report that additional information may be obtained from Q.C. Sun, University of Colorado, RASEI, Boulder, CO 80309, United States. Additional authors for this research include H. Mundoor, J.C. Ribot, V. Singh, I.I. Smalyukh and P. Nagpal.
Keywords for this news article include: Boulder, Colorado, United States, Nanotechnology, Emerging Technologies, North and Central America
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