By a News Reporter-Staff News Editor at Energy Weekly News -- Fresh data on Physical Chemistry are presented in a new report. According to news reporting originating in Singapore, Singapore, by VerticalNews journalists, research stated, "Solution processed graphene variants including graphene oxide (GO) and reduced graphene oxide (RGO) are promising materials for potential optoelectronic applications. To date, efficiency of the excitation energy transfer into GO and RGO thin layers has not been investigated in terms of donor-acceptor separation distance."
The news reporters obtained a quote from the research from Nanyang Technological University, "In the present work, we study nonradiative energy transfer (NRET) from CdSe/CdS quantum dots into single and/or double layer GO or RGO using time-resolved fluorescence spectroscopy. We observe shorter lifetimes as the separation distance between the QDs and GO or RGO decreases. In accordance with these lifetimes, the rates reveal the presence of two different mechanisms dominating the NRET. Here we show that excitonic NRET is predominant at longer intervals while both excitonic and nonexcitonic NRET exist at shorter distances. In addition, we find the NRET rate behavior to be strongly dependent on the reduction degree of the GO-based layers. We obtain high NRET efficiency levels of similar to 97 and similar to 89% for the closest separation of the QD-RGO pair and the QD-GO pair, respectively."
According to the news reporters, the research concluded: "These results indicate that strong NRET from QDs into thin layer GO and RGO makes these solution-processable thin films promising candidates for light harvesting and detection systems."
For more information on this research see: Evidence for Nonradiative Energy Transfer in Graphene-Oxide-Based Hybrid Structures. Journal of Physical Chemistry C, 2013;117(48):25298-25304. Journal of Physical Chemistry C can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of Physical Chemistry C - www.pubs.acs.org/journal/jpccck)
Our news correspondents report that additional information may be obtained by contacting A. Yeltik, Nanyang Technological University, Sch Phys & Math Sci, Phys & Appl Phys Div, Singapore 639798, Singapore. Additional authors for this research include G. Kucukayan-Dogu, B. Guzelturk, S. Fardindoost, Y. Kelestemur and H.V. Demir.
Keywords for this news article include: Asia, Energy Companies, Physical Chemistry
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