Pulsed laser deposition of indium tin oxide nanowires in argon and helium

Yong, Thian-Khok and Tan, Sek-Sean and Nee, Chen-Hon and Yap, Seong-Shan and Kee YY, Yeh-Yee and Sáfrán, György and Horváth, Zsolt Endre and Moscatello, Jason and Yap, Yoke-Khin and Tou, Teck-Yong (2012) Pulsed laser deposition of indium tin oxide nanowires in argon and helium. MATERIALS LETTERS, 66 (1). pp. 280-281. ISSN 0167-577X

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Abstract

Nanowires of indium tin oxide (ITO) were grown on catalyst-free amorphous glass substrates at relatively low temperature of 250 degrees C in argon and helium ambient by the Nd:YAG pulsed laser deposition technique. All the ITO samples showed crystalline structure due to substrate heating and the (400) X-ray diffraction peak became relatively stronger as the pressure was increased. The surface morphology was also changed from compact, polycrystalline thin-film layers to a dendritic layer consisting of nanowires for some limited pressure ranges. The transition from the normal thin-film structure to nanowires was likely due to the vapor-liquid-solid mechanism but under catalyst-free condition. These nanowires tended to grow perpendicularly on the glass substrate, as observed with the transmission electron microscopy (TEM), which also confirmed that these nanowires were crystalline. (C) 2011 Elsevier B.V. All rights reserved.

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