Sol-gel synthesized SnO2 nanoparticles and their properties

Das, Soumen ; Basu, Soumen ; Majumdar, Gautam ; Chakravorty, Dipankar ; Chaudhuri, S. (2007) Sol-gel synthesized SnO2 nanoparticles and their properties Journal of Nanoscience and Nanotechnology, 7 (12). pp. 4402-4411. ISSN 1533-4880

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Sol-gel synthesized SnO2 nanoparticles with an average size of 2.0 nm obtained at 373 K were gradually annealed to 673 K in air for 25 minutes. Sequentially taken transmission electron microscopy (TEM) images showed that particle agglomeration of these non-matrix SnO2 nanocrystals was a very slow process. The blue shifts of the band gap (~2.3 eV) obtained from the optical absorbance spectra were matched with the theoretical results of the size related excitonic binding energies. These calculations also supported the observed slow grain growth. The depth sensitive hardness measurements of the thin films indicated hardness in the range of 5.03 GPa to 6.79 GPa. These undoped and non-matrix SnO2 nanoparticles were also investigated with the X-ray photoelectrons spectroscopy (XPS), atomic force microscope (AFM), X-ray diffraction spectroscopy (XRD), and ac impedance analyzer.

Item Type:Article
Source:Copyright of this article belongs to American Scientific Publishers.
Keywords:SnO2 Nanoparticles; Sol-gel Synthesis; Hardness
ID Code:65685
Deposited On:17 Oct 2011 10:39
Last Modified:17 Oct 2011 10:39

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