Nanocrystalline CuO Films Prepared by Pyrolysis
Nanocrystalline CuO Films Prepared by Pyrolysis
Nanocrystalline CuO Films Prepared by Pyrolysis
Abstract
Nanocrystalline CuO films have been formed by the pyrolysis of copper arachidate LB multilayers. FTIR and UV–vis spectroscopic
investigations showed that the pyrolysis was initiated at ∼100 ◦ C and was complete at ∼300 ◦ C. XPS and electron diffraction studies confirm
the films to be single-phase copper (II) oxide. Analysis of the bright-field images showed that the film consists of uniformly distributed particles
of size 2.5 ± 1.5 nm. The optical absorption edge of the CuO film did not show a measurable blue shift attributable to the nanocrystalline nature
of the films. The absorption features are analysed in the background of the uncertainty prevailing in the nature and value of the absorption
edge of CuO.
© 2004 Elsevier B.V. All rights reserved.
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doi:10.1016/j.colsurfa.2004.10.029
278 M. Parhizkar et al. / Colloids and Surfaces A: Physicochem. Eng. Aspects 257–258 (2005) 277–282
The results show that the oxidation process and the removal
of organic components are completed at about 300 ◦ C. The
formation of a single-phase, nanocrystalline CuO film was
confirmed by transmission electron microscopy and X-ray
photoelectron spectroscopy studies.
2. Experimental
Fig. 3. UV–vis transmittance (T) and reflectance (R) spectra of (a) as de-
posited copper arachidate multilayer and after heat treatment at (b) 100 ◦ C,
(c) 200 ◦ C, (d) 300 ◦ C, (e) 400 ◦ C, 500 ◦ C.
T = (1 − R)e−αt
4. Conclusions
Acknowledgments
References
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