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New Findings from AF Ioffe Phys Technical Institute Update Understanding of Nanocrystals (Laser spectroscopy study of Cr3+ and Mn4+ ions in...

July 11, 2014



New Findings from AF Ioffe Phys Technical Institute Update Understanding of Nanocrystals (Laser spectroscopy study of Cr3+ and Mn4+ ions in nanocrystalline MgO: Mechanisms of inhomogeneous broadening and symmetry of centers)

By a News Reporter-Staff News Editor at Science Letter -- New research on Nanocrystals is the subject of a report. According to news originating from St. Petersburg, Russia, by NewsRx correspondents, research stated, "Sol-gel technology-produced MgO:Cr3+ and MgO:Mn4+,Li+ nanocrystals (particle size similar to 5 nm) were studied with laser spectroscopy techniques. The low-temperature fluorescence line narrowing (FLN) experiments were performed for the inhomogeneously broadened R-line of cubic Cr3+ centers."

Our news journalists obtained a quote from the research from AF Ioffe Phys Technical Institute, "The observed spectra and their dependence on excitation wavelength are significantly different from that reported in literature for the bulk single crystals, and thus demonstrate specific inhomogeneous broadening mechanisms in nanocrystals. The nature of inhomogeneous broadening of spectral lines of impurity ions in nanocrystals is discussed."

According to the news editors, the research concluded: "The site-selective spectroscopy of MgO:0.02%Mn,04%Li nanocrystals (Li added for charge compensation) showed that no lines in the emission spectra can be ascribed to Mn4+ centers with cubic symmetry."

For more information on this research see: Laser spectroscopy study of Cr3+ and Mn4+ ions in nanocrystalline MgO: Mechanisms of inhomogeneous broadening and symmetry of centers. Journal of Luminescence, 2014;152():33-36. Journal of Luminescence can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Luminescence - www.elsevier.com/wps/product/cws_home/505700)

The news correspondents report that additional information may be obtained from S.P. Feofilov, AF Ioffe Phys Technical Inst, St Petersburg 194021, Russia. Additional authors for this research include A.A. Kaplyanskii, A.B. Kulinkin and R.I. Zakharchenya (see also Nanocrystals).

Keywords for this news article include: Russia, Eurasia, St. Petersburg, Nanotechnology, Nanocrystalline, Emerging Technologies

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


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Source: Science Letter


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