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Reports from University of Sao Paulo Add New Data to Findings in Quantum Dots (Temperature driven three-dimensional ordering of InGaAs/GaAs quantum...

July 4, 2014



Reports from University of Sao Paulo Add New Data to Findings in Quantum Dots (Temperature driven three-dimensional ordering of InGaAs/GaAs quantum dot superlattices grown under As-2 gas flux)

By a News Reporter-Staff News Editor at Science Letter -- A new study on Quantum Dots is now available. According to news reporting originating from Sao Carlos, Brazil, by NewsRx correspondents, research stated, "A comprehensive microscopy analysis has been undertaken to study three-dimensional quantum dot (QD) ordering in multilayered In0.4GamAs/GaAs structures grown with an As2 flux at different substrate temperatures. Atomic force microscopy, transmission electron microscopy, and photoluminescence measurements were employed to fully understand the formation of these extended dot structures."

Our news editors obtained a quote from the research from the University of Sao Paulo, "Changes in the lateral pattern of QD ordering are correlated with their vertical alignment. These correlations are analyzed in light of the inherent transformation of the wetting and spacer layers, as well as changes in the shape, strain, and composition of individual QDs."

According to the news editors, the research concluded: "The experimental results are attributed to the anisotropy in the thermally activated surface mass transport and the relaxation of elastic stresses."

For more information on this research see: Temperature driven three-dimensional ordering of InGaAs/GaAs quantum dot superlattices grown under As-2 gas flux. Applied Surface Science, 2014;305():689-696. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)

The news editors report that additional information may be obtained by contacting P.M. Lytvyn, University of Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP, Brazil. Additional authors for this research include Y.I. Mazur, M. Benamara, M.E. Ware, V.G. Dorogan, L.D. de Souza, E. Marega, M.D. Teodoro, G.E. Marques and G.J. Salamo (see also Quantum Dots).

Keywords for this news article include: Brazil, Sao Carlos, Quantum Dots, South America, Nanotechnology, 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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