Optical Properties of Core–Shell Gold–Silver and Silver–Gold Nanoparticles for Near UV and Visible Radiation Wavelengths

• Published in: Plasmonics (Norwell, Mass.) Vol. 7; no. 3; pp. 469 - 474
• Main Authors: Pustovalov, V. K., Astafyeva, L. G., Fritzsche, W.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-09-2012
• Subjects: Biochemistry; Biological and Medical Physics; Biophysics; Biotechnology; Chemistry; Chemistry and Materials Science; Computational efficiency; Mathematical models; Nanoparticles; Nanotechnology; Nonlinearity; Optical properties; Plasmonics; Shells; Wavelengths; Gold; Silver; Core–shell; Nanoparticle; Optical properties
• ISSN: 1557-1955; 1557-1963
• DOI: 10.1007/s11468-012-9330-z

Modeling of optical properties of spherical core–shell gold–silver and silver–gold nanoparticles (NPs) was carried out based on extended Mie theory for radiation wavelengths in the range 300 ≤ λ ≤ 650 nm. Efficiency factors of absorption, scattering, and extinction of radiation by core–shell NPs in the range of the radii 5–100 nm and in the range of shell thicknesses 0–40 nm were calculated. Results show the nonlinear dependences of optical properties of core–shell gold–silver and silver–gold nanoparticles on radiation wavelengths, core radii, and shell thicknesses. These results can be applied for photonic technologies of nanoparticles.