Tunable absorption of Au-Al{sub 2}O{sub 3} nanocermet thin films and its morphology

Journal Article · Mon Jul 19 04:00:00 EDT 2004 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.1774250· OSTI ID:20632673

Hazra, S; Gibaud, A; Sella, C ^[1]

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1. Surface Physics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India)

The morphology of Au-Al{sub 2}O{sub 3} nanocermet thin films, prepared by cosputtering Au and Al{sub 2}O{sub 3} on float glass substrates, was studied using surface sensitive x-ray scattering techniques and the results were correlated with the optical absorption of the films measured using ultraviolet visible spectroscopy. The presence of gold nanoparticles in an alumina matrix is evident from both x-ray scattering and spectroscopic studies. The distribution of nanoparticles is obtained from grazing incidence small angle x-ray scattering, while the electron density profile obtained from the analysis of x-ray reflectivity data gives total film thickness, volume fraction (f) of Au and the special arrangement along the growth direction. Optical properties show a linear dependence of the absorption peak position with f, which is interesting for making nanocomposites of tunable absorption.

• OSTI ID: 20632673
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 3 Vol. 85; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ALUMINIUM OXIDES
CERMETS
ELECTRON DENSITY
GOLD
MORPHOLOGY
NANOSTRUCTURES
PARTICLES
REFLECTIVITY
SMALL ANGLE SCATTERING
SURFACE COATING
THICKNESS
THIN FILMS
ULTRAVIOLET RADIATION
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
X-RAY DIFFRACTION