Nano Archive

Thiol-Derivatized Nanocrystalline Arrays of Gold, Silver, and Platinum

Vijaya Sarathy, K. and Raina, Gargi and Yadav, R. T. and Kulkarni, G. U. and Rao, C. N. R. (1997) Thiol-Derivatized Nanocrystalline Arrays of Gold, Silver, and Platinum. Journal of Physical Chemistry B, 101 (48). pp. 9876-9880.

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A simple procedure has been developed to prepare thiol-derivatized nanoparticles of metals. The procedure involves the transfer of well-characterized metal hydrosols to a hydrocarbon medium containing the thiol. Thiol-derivatized nanoparticles Au, Ag, and Pt of near spherical shape forming nanocrystalline arrays have been characterized by X-ray diffraction, transmission electron microscopy (TEM), and other techniques. Thiolderivatized Au particles of mean diameters of 1.0, 2.1, and 4.2 nm from nanocrystalline arrays show characteristic X-ray diffraction patterns. The nanoparticles exhibit Moire´ fringes when deposited on a flake of MoSe2, showing that each particle is in itself crystalline. Besides spherical nanoparticles, thiol-derivatized particles of other shapes have been prepared, hexagonal Pt nanoparticles being particularly novel. Scanning tunneling microscopy images not only confirm the size and shape of nanoparticles revealed by TEM, but also show evidence for thiol molecules on the surface.

Item Type:Article
Subjects:Material Science > Nanochemistry
ID Code:2564
Deposited By:JNCASR
Deposited On:20 Jan 2009 11:40
Last Modified:20 Jan 2009 11:40

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