By a News Reporter-Staff News Editor at Science Letter -- Research findings on Nanoparticles are discussed in a new report. According to news originating from Little Rock, Arkansas, by NewsRx correspondents, research stated, "Modeling of nonlinear dependences of optical properties of spherical two-layered gold core and some material shell nanoparticles (NPs) placed in water on parameters of core and shell was carried out on the basis of the extended Mie theory. Efficiency cross-sections of absorption, scattering and extinction of radiation with wavelength 532 nm by core-shell NPs in the ranges of core radii r(00)=5-40 nm and of relative NP radii r(1)/r(00) = 1-8 were calculated (r(1) - radius of two-layered nanoparticle)."
Our news journalists obtained a quote from the research from the University of Arkansas, "Shell materials were used with optical indexes in the ranges of refraction n(1) =0.2-1.5 and absorption k(1) = 0-3.5 for the presentation of optical properties of wide classes of shell materials (including dielectrics, metals, polymers, vapor shell around gold core). Results show nonlinear dependences of optical properties of two-layered NPs on optical indexes of shell material, core r(00), and relative NP r(1)/r(00) radii. Regions with sharp decrease and increase of absorption, scattering and extinction efficiency cross-sections with changing of core and shell parameters were investigated. These dependences should be taken into account for applications of two-layered NPs in laser nanomedicine and optical diagnostics of tissues."
According to the news editors, the research concluded: "The results can be used for experimental investigation of shell formation on NP core and optical determination of geometrical parameters of core and shell of two-layered NPs."
For more information on this research see: Dependences of optical properties of spherical two-layered nanoparticles on parameters of gold core and material shell. Journal of Quantitative Spectroscopy & Radiative Transfer, 2013;131():121-129. Journal of Quantitative Spectroscopy & Radiative Transfer can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Journal of Quantitative Spectroscopy & Radiative Transfer - www.elsevier.com/wps/product/cws_home/272)
The news correspondents report that additional information may be obtained from V.K. Pustovalov, University of Arkansas, Phillips Class Laser & Nanomed Labs, Little Rock, AR 72205, United States. Additional authors for this research include L.G. Astafyeva and V.P. Zharov (see also Nanoparticles).
Keywords for this news article include: Arkansas, Little Rock, United States, Nanotechnology, Emerging Technologies, North and Central America
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