Please use this identifier to cite or link to this item:
|Title:||Composition, particle size, and near-infrared irradiation effects on optical properties of Au-Au2S nanoparticles||Authors:||Tan, M.C.
|Issue Date:||Jan-2008||Citation:||Tan, M.C., Ying, J.Y., Chow, G.M. (2008-01). Composition, particle size, and near-infrared irradiation effects on optical properties of Au-Au2S nanoparticles. Journal of Materials Research 23 (1) : 281-293. ScholarBank@NUS Repository. https://doi.org/10.1557/jmr.2008.0038||Abstract:||Near-infrared (NIR)-absorbing nanoparticles synthesized by the reduction of tetrachloroauric acid (HAuCl4) using sodium sulfide (Na2S) exhibited absorption bands at ∼530 nm and at the NIR region of 650-1100 nm. A detailed study on the structure and microstructure of as,synthesized nanoparticles. was reported previously. The as-synthesized nanoparticles were found to consist of amorphous AuxS (x = ∼2), mostly well mixed within crystalline Au. In this work, the optical properties were tailored by varying the precursor molar ratios of HAuCl4 and Na2S. In addition, a detailed study of composition and particle-size effects on the optical properties was discussed. The change of polarizability by the introduction of S in the form of AuxS (x = ∼2) had a significant effect on NIR absorption. Also, it was found in this work that exposure of these particles to NIR irradiation using a Nd:YAG laser resulted in loss of the NIR absorption band. Thermal effects generated during NIR irradiation had led to microstructural changes that modified the optical properties of particles. © 2008 Materials Research Society.||Source Title:||Journal of Materials Research||URI:||http://scholarbank.nus.edu.sg/handle/10635/86223||ISSN:||08842914||DOI:||10.1557/jmr.2008.0038|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Oct 28, 2020
WEB OF SCIENCETM
checked on Oct 21, 2020
checked on Oct 11, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.