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Title: Nature and Properties of Ultrathin Nanocrystalline Gold Films Formed at the Organic-Aqueous Interface
Authors: Agrawal, Ved Varun
Kulkarni, G U
Rao, C N R
Keywords: Langmuir-Blodgett-Films
Electronic- Properties
Nanoparticle Arrays
Metal Nanocrystals
Au Nanoparticles
Ordered Arrays
Quantum Dots
Issue Date: 21-Apr-2005
Publisher: American Chemical Society
Citation: Journal of Physical Chemistry B 109(15), 7300-7305 (2005)
Abstract: Ultrathin nanocrystalline films of gold formed at different temperatures at the organic-aqueous interface have been investigated by X-ray diffraction, electron microscopy, atomic force microscopy, and electronic spectroscopy. The films are smooth and continuous over relatively large length scales and are generally similar to 100 nm thick. The size of the nanocrystals is sensitive to the reaction temperature, which also determines whether the film is metallic or an activated conductor. The surface plasmon band of gold is highly red-shifted in the films. Alkanethiols perturb the structure of the films, with the magnitude of the effect depending on the chain length. Accordingly, the position of the plasmon band and the electrical resistance of the films are affected by interaction with alkanethiols; the plasmon band approaches that of isolated nanocrystals in the presence of long-chain thiols.
Description: Restricted access
Other Identifiers: 1520-6106
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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