FABRICATION AND CHARACTERIZATION STUDIES OF LITHIUM-BORATE RUBY GLASSES CONTAINING GOLD NANOPARTICLES

Y. Shivaprakash; R.V. Anavekar

doi:10.29121/granthaalayah.v5.i4RAST.2017.3307

Authors

Y. Shivaprakash Department of Physics, Governament First Grade College, Devanahalli, Bangalore, (R) 521010, India
R.V. Anavekar Department of Physics, Jnanabharathi Campus, Bangalore University, Bangalore-560 056, Karnataka, India

DOI:

https://doi.org/10.29121/granthaalayah.v5.i4RAST.2017.3307

Keywords:

Borate Glass, Gold Nanoparticles, Optical Absorption, SPR

Abstract [English]

Glasses containing Au nanoparticles have been synthesized in the base glass of composition 30Li₂O–70B₂O₃using gold chloride (HAuCl₄.3H₂O) as a dopant. The characteristic ruby color has been observed which is attributed due to surface plasmon resonance of the Au nanoparticles. The hue of the color increases with the increase of concentration of the dopant. Presence of the gold nanoparticles has been confirmed by studying the optical absorption spectra in the visible range which show a characteristic absorption peak at ~560nm. XRD and SEM studies show that the addition of Au increases the kinetics of growth and crystallization. ESR studies indicate that the electronic state of gold is either Au⁰ or Au⁺.

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