News Column

Researchers from University of Wyoming Report Findings in Nanocrystals

June 17, 2014

By a News Reporter-Staff News Editor at Physics Week -- A new study on Nanocrystals is now available. According to news reporting originating from Laramie, Wyoming, by VerticalNews correspondents, research stated, "In this work we study the electronic structure of CdmSem quantum dots of various sizes and different shapes such as spheres and cubes using DFT, TDDFT, and CIS methods. This work requires a careful computational analysis where a proper exchange-correlation functional has to be chosen to fit the experimental optical gap."

Our news editors obtained a quote from the research from the University of Wyoming, "We find some differences in the optical and HOMO-LUMO gap values between spheres and cubes. In general, the gaps for the cubes have higher values than those for the spheres. We also calculate optical absorption spectra using the data for energy levels and oscillator strengths for optical transitions. We find that DFT yields some discrepancy in the density of states for the spheres and cubes. However, the density of states calculated by TDDFT and CIS provide better agreement."

According to the news editors, the research concluded: "The results of the calculation can be useful for quantum dots synthesized in laser ablation experiments."

For more information on this research see: Spectroscopic and electronic structure properties of CdSe nanocrystals: spheres and cubes. Physical Chemistry Chemical Physics, 2014;16(16):7555-61. (Royal Society of Chemistry -; Physical Chemistry Chemical Physics -

The news editors report that additional information may be obtained by contacting V. Proshchenko, Dept. of Physics and Astronomy, University of Wyoming, 3905, 1000 E University Avenue, Laramie, WY 82071, United States.

Keywords for this news article include: Laramie, Wyoming, Quantum Dots, United States, Nanotechnology, Quantum Physics, Emerging Technologies, North and Central America.

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Source: Physics Week

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