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Open Access Nano Express

Self-catalytic crystal growth, formation mechanism, and optical properties of indium tin oxide nanostructures

Yuan-Chang Liang* and Hua Zhong

Author affiliations

Institute of Materials Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan

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Citation and License

Nanoscale Research Letters 2013, 8:358  doi:10.1186/1556-276X-8-358

Published: 22 August 2013

Abstract

In-Sn-O nanostructures with rectangular cross-sectional rod-like, sword-like, and bowling pin-like morphologies were successfully synthesized through self-catalytic growth. Mixed metallic In and Sn powders were used as source materials, and no catalyst layer was pre-coated on the substrates. The distance between the substrate and the source materials affected the size of the Sn-rich alloy particles during crystal growth in a quartz tube. This caused In-Sn-O nanostructures with various morphologies to form. An X-ray photoelectron spectroscope and a transmittance electron microscope with an energy-dispersive X-ray spectrometer were used to investigate the elemental binding states and compositions of the as-synthesized nanostructures. The Sn doping and oxygen vacancies in the In2O3 crystals corresponded to the blue-green and yellow-orange emission bands of the nanostructures, respectively.

Keywords:
In-Sn-O nanostructures; Morphology; Doping; Crystal growth; Optical properties