Low temperature and rapid deposition of ZnO nanorods on Si(100) substrate with tunable optical emissions

Brahma, Sanjaya and Huang, J-L and Liu, CP and Kukreja, LM and Shivashankar, SA (2013) Low temperature and rapid deposition of ZnO nanorods on Si(100) substrate with tunable optical emissions. In: Materials Chemistry and Physics, 140 (2-3). pp. 634-642.

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Abstract

This research article describes the large scale fabrication of ZnO nanorods of various shapes on Si(100) substrate, by using metalorganic precursor of Zn in solutions with microwave as the source of energy. This is a low temperature, environmental friendly and rapid thin film deposition process, where ZnO nanorods (1-3 mu m length) were grown only in 1-5 min of microwave irradiation. All as-synthesized nanorods are of single crystalline grown along the < 0001 > crystallographic direction. The coated nanorods were found to be highly dense having a thickness of similar to 1-3 mu m over the entire area 20 mm x 20 mm of the substrate. The ZnO thin film comprising of nanorods exhibits good adhesion with the substrate. A possible mechanism for the initial nucleation and growth of ZnO is discussed. A cross over from a strong visible light emission to an enhanced UV emission is observed, when the nature of the surfactants are varied from polymeric to ionic and nonionic. The position of the chromaticity coordinates in yellow region of the color space gives an impression of white light generation from these coatings by exciting with a blue laser.

Item Type:	Journal Article
Publication:	Materials Chemistry and Physics
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Nanostructures; Chemical Synthesis; Electron Microscopy; Optical Properties
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	02 Sep 2013 06:30
Last Modified:	02 Sep 2013 06:30
URI:	http://eprints.iisc.ac.in/id/eprint/46955

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