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Researchers at Indian Institute of Science Report New Data on Nanocrystals (Determination of Internal Structures of Heterogeneous Nanocrystals Using...

August 22, 2014



Researchers at Indian Institute of Science Report New Data on Nanocrystals (Determination of Internal Structures of Heterogeneous Nanocrystals Using Variable-Energy Photoemission Spectroscopy)

By a News Reporter-Staff News Editor at Energy Weekly News -- A new study on Nanocrystals is now available. According to news reporting from Bangalore, India, by VerticalNews journalists, research stated, "This article describes the determination of the internal structure of heterogeneous nanoparticle systems including inverted core-shell (CdS core and CdSe shell) and alloyed (CdSeS) quantum dots using depth-resolved, variable-energy X-ray photoelectron spectroscopy (XPS). A unique feature of this work is the combination of photoelectron spectroscopy performed at lower X-ray energies (400-700 eV), to achieve surface sensitivity, with bulk sensitive measurements at high photon energies (>2000 eV), thereby providing detailed information about the whole nanoparticle structure with a great accuracy."

The news correspondents obtained a quote from the research from the Indian Institute of Science, "The use of high photon energies furthermore allows us to investigate nanoparticles much larger than those studied thus far. This capability is a consequence of the much-increased mean free path of the photoelectron achieved at high excitation energies."

According to the news reporters, the research concluded: "Our results show that the actual structures of the synthesized nanoparticles are considerably different from the nominal, targeted structures, which can be post facto rationalized in terms of the reactivity of different constituents."

For more information on this research see: Determination of Internal Structures of Heterogeneous Nanocrystals Using Variable-Energy Photoemission Spectroscopy. Journal of Physical Chemistry C, 2014;118(28):15534-15540. 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 journalists report that additional information may be obtained by contacting S. Mukherjee, Indian Inst Sci, Jawaharlal Nehru Center Adv Sci Res, Bangalore 560012, Karnataka, India. Additional authors for this research include A. Hazarika, P.K. Santra, A.L. Abdelhady, M.A. Malik, M. Gorgoi, P. O'Brien, O. Karis and D.D. Sarma.

Keywords for this news article include: Asia, India, Bangalore, Nanoparticle, 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: Energy Weekly News


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