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Title: Synthesis and optical limiting studies of HA(P) and HA(P)@SiO2 core-shell nanoparticles
Authors: Rahulan, Mani K.
Vinitha, G.
Ganesan, S.
Philip, Reji
Aruna, P.
Issue Date: 2012
Publisher: Springer Verlag
Citation: Journal of Materials Science, 2012, Vol.23, p877
Abstract: We report the spectral and optical limiting properties of two kinds of HAP nanoparticles (pure HAP and HAP@SiO2 core–shell nanoparticles) that were wet-chemically prepared and coated with silica by means of Stober method. The size, framework substitution and silica coating formation of the resultant particles were confirmed by Transmission Electron Microscopy, X-ray diffraction, Fourier Transform Infrared Spectroscopy and Thermogravimetric analysis. The nonlinear optical limiting properties of HAP and HAP@SiO2 nanoparticles suspended in ethylene glycol is studied at 532 nm using 5 ns Nd:YAG laser pulses. Observations indicate that effective three-photon absorption is found to be responsible for strong optical limiting characteristics in these nanoparticles and it is seen that the optical nonlinearity is enhanced in core–shell structures as compared with single counterparts. The nonlinear optical parameters calculated from the data show that these materials are efficient optical limiters.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0957-4522
1573-482X (Online)
Alternative Location: DOI: 10.1007/s10854-011-0510-y
Copyright: 2012 Springer Verlag
Appears in Collections:Research Papers (LAMP)

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