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Química Nova

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SILVA, Gabriel M. et al. Synthesis of indium tin oxide nanoparticles by a nonhydrolytic sol-gel method. Quím. Nova [online]. 2012, vol.35, n.3, pp.473-476. ISSN 0100-4042.

Indium tin oxide nanoparticles were synthesized in two different sizes by a nonhydrolytic sol-gel method. These powders were then transformed into ITO via an intermediate metastable state at between 300 and 600 ºC. The presence of characteristic O-In-O and O-Sn-O bands at 480 and 670 cm-1 confirmed the formation of ITO. The X-ray diffraction patterns indicated the preferential formation of metastable hexagonal phase ITO (corundum type) as opposed to cubic phase ITO when the reflux time was less than 3 h and the heat treatment temperature was below 600 ºC. Particle morphology and crystal size were examined by scanning electron microscopy.

Keywords : ITO; sol-gel nonhydrolitic; nanoparticles.

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