Tawale, Jai S. and Gupta, Gaurav and Mohan, Anand and Kumar, Ashavani and Srivastava, Avanish K. (2014) Growth of thermally evaporated SnO2 nanostructures for optical and humidity sensing application. Sensors and Actuators B: Chemical, 201. pp. 369-377. ISSN 0925-4005

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Abstract

Nanoscaled spherical, facetted-spherical and octahedral shapes of high yield and economically viable tin oxide (SnO2) was synthesized using direct sublimation process employing thermal evaporation at 1350 C without any catalyst. The crystalline structure and morphology of SnO2 nanostructures were characterized using X-ray diffraction and electron microscopy. The morphology reveals that the reaction time, that is evaporation time, is important for successful synthesis of different shape and size of SnO2 nanostructures. High resolution transmission electron microscopy exhibited the particle size of SnO2 between 5 and 6 nm. Nanoscale morphological tuning in size and shape facilitates alteration in optical band gap, absorption and photolumiscence properties. The humidity sensor based on spherical SnO2 nanostructures demonstrates an excellent sensitivity with an increase in relative humidity (RH) at room temperature.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Elsevier.
Uncontrolled Keywords:	SnO2nanostructures Spherical and octahedral geometry Optical properties Humidity sensora
Subjects:	Chemistry Electrochemistry Instruments/ Instrumentation
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	05 Oct 2015 11:39
Last Modified:	05 Oct 2015 11:39
URI:	http://npl.csircentral.net/id/eprint/1318

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