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Effect of concentration and particle size on nonlinearity of Au nano-fluid prepared by Y (60Co) radiation


Shahriari, Esmaeil and Mat Yunus, Wan Mahmood and Naghavi, Kazem and Talib, Zainal Abidin (2010) Effect of concentration and particle size on nonlinearity of Au nano-fluid prepared by Y (60Co) radiation. Optics Communications, 283 (9). pp. 1929-1932. ISSN 0030-4018; ESSN: 1873-0310


Nonlinear properties of Au nano-fluid prepared by γ-radiation method at different concentrations were investigated. Measurements of nonlinear refractive index and nonlinear absorption coefficient were carried out using a single beam Z-scan technique. A green CW laser beam operated at 532 nm was used as excitation source. The Au nano-fluid shows a good third order nonlinear response. The sign of the nonlinear refractive index is found to be negative and the magnitude is in the order of 10−7 cm2/W. This nonlinear effect increases as the concentration increases from 3.119 × 10−4 to 2.354 × 10−3 M which correspond to particle sizes of 4.0–30.5 nm, respectively. A good linear relationship was obtained between nonlinear refractive index and concentration. However the relationship between nonlinear refractive index and particle size was nonlinear behavior.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1016/j.optcom.2010.01.005
Publisher: Elsevier
Keywords: Nonlinear refractive index; Z-Scan; Thermal effect; Nanoparticles
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 19 Jun 2015 01:44
Last Modified: 19 Jun 2015 01:44
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.optcom.2010.01.005
URI: http://psasir.upm.edu.my/id/eprint/14213
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