Title

Physical and optical properties of sol-gel nano-silver doped silica film on glass substrate as a function of heat-treatment temperature

Authors

Authors

W. Y. Li; S. Seal; E. Megan; J. Ramsdell; K. Scammon; G. Lelong; L. Lachal;K. A. Richardson

Comments

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Abbreviated Journal Title

J. Appl. Phys.

Keywords

METAL PARTICLES; GOLD-COLLOIDS; THIN-FILMS; NANOPARTICLES; COATINGS; SPECTRA; SIO2; SIO2-COATINGS; ABSORPTION; COMPOSITES; Physics, Applied

Abstract

Nano-silver doped silica films were deposited on glass slides using a sol-gel process and heat-treated at different temperatures. The films were characterized by ultraviolet-visible spectroscopy, x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), Rutherford backscattering spectrometry (RBS), and transmission electron microscopy for their optical, chemical, and structural properties. The absorption peak of silver colloids (wavelength from 400 to 460 nm) was present and a blueshift and intensity reduction of the absorption peak was observed during heat-treatment. Particle size reduction and surface morphology changes in the films were observed by AFM as a function of varying heat treatment temperatures. Silver nanoparticles were formed through spontaneous reduction of silver ions. The oxidation of silver occurs during heat-treatment, causing a reduction of absorption intensity. An interdiffusion between the Ag in the film and Na in the substrate glass was observed by XPS and RBS. Sodium in the coating likely increased the stability of silver oxide at high temperature treated samples. (C) 2003 American Institute of Physics.

Journal Title

Journal of Applied Physics

Volume

93

Issue/Number

12

Publication Date

1-1-2003

Document Type

Article

Language

English

First Page

9553

Last Page

9561

WOS Identifier

WOS:000183288900021

ISSN

0021-8979

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