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Nano Science and Nano Technology : An Indian Journal

Volume 2(2-3)
December 2008

Vol. 2, Issue 2-3, 2008

Solvatochromic Behavior Of Gold Nanoparticles
 In Different Solvents
     
Al-Sayed Abdel-Majied Al-Sherbini,
Department of environmental, Photochemical and Agriculture Applications
National Institute of Laser Enhanced Science (NILES) Cairo University, Cairo, Egypt.P.O. Box 12631
   
Gold nanoparticles were prepared in different solvents of different polarities by laser-induced breakdown of the gold metal plate. The results showed that the position of the surface plasmon bands depends on the optical dielectric constant (em) and dielectric permittivity (eo) with respect to the polarity of the medium. In polar solvents a blue shift was observed when we go from water (em= 1.77, Z = 94.6 , eo = 78.3) to butanol (em = 1.97, Z = 77.7 , eo = 17.5) while in nonpolar solvents the blue shifts are observed when we go from THF (em= 1.98, Z = 58.8 , eo = 7.5) to cyclohexane (em = 2.03, Z = 60.1 , eo = 2.02). The Particle sizes were determined by using transmission electron microscope(TEM).
 
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