Growth and characterization of micro and nanostructures of lead telluride (PbTe) by thermal evaporation method

Tamilselvan, V and Kumar, Rakesh R and Rao, Narasimha K (2013) Growth and characterization of micro and nanostructures of lead telluride (PbTe) by thermal evaporation method. In: Materials Letters, 96 . pp. 162-165.

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Abstract

Lead telluride micro and nanostructures have been grown on silicon and glass substrates by a simple thermal evaporation of PbTe in high vacuum of 3 x 10(-5) mbar. Growth was carried out for two different distances between the evaporation source and the substrates. Synthesized products consist of nanorods and micro towers for 2.4 cm and 3.4 cm of distance between the evaporation source and the substrates respectively. X-ray diffraction and transmission electron microscopy studies confirmed crystalline nature of the nanorods and micro towers. Nanorods were grown by vapor solid mechanism. Each micro tower consists of nano platelets and is capped with spherical catalyst particle at their end, suggesting that the growth proceeds via vapor-liquid-solid (VLS) mechanism. EDS spectrum recorded on the tip of the micro tower has shown the presence of Pb and Te confirming the self catalytic VLS growth of the micro towers. These results open up novel synthesis methods for PbTe nano and microstructures for various applications.

Item Type:	Journal Article
Publication:	Materials Letters
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	PbTe; Micro and Nanostructures; Physical Vapor Deposition; Nanocrystalline Materials
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	30 May 2013 11:28
Last Modified:	30 May 2013 11:28
URI:	http://eprints.iisc.ac.in/id/eprint/46605

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