Sub-wavelength waveguide properties of 1D and surfacefunctionalized SnO 2 nanostructures of various morphologies

Bonu, V and Sahu, BK and Das, A and Amirthapandian, S and Dhara, S and Barshilia, Harish C (2019) Sub-wavelength waveguide properties of 1D and surfacefunctionalized SnO 2 nanostructures of various morphologies. Beilstein Journal of Nanotechnology, 9 (1). pp. 379-388. ISSN 21904286

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Abstract

One-dimensional (1D) SnO 2 sub-wavelength waveguides are a critical contribution to advanced optoelectronics. Further understanding of the surface defects and role of morphology in 1D SnO 2 nanowires can help to better utilize these nanostructures more efficiently. For this purpose, three different nanowires (NWs), namely belts, cylindrical- and square-shaped structures were grown using SnO 2 quantum dots as a precursor material. The growth process of these NWs is discussed. The nanobelts were observed to grow up to 3 mm in length. Morphological and structural studies of the nanostructures were also carried out. All NWs showed waveguide behavior with visible photoluminescence (PL) upon excitation with a 325 nm laser. This behavior was also demonstrated in tapered and surface-functionalized SnO 2 NWs. While the tapered waveguide can allow for easy focusing of light, the simple surface chemistry offers selective light propagation by tuning the luminescence. Defect-related PL in NWs is studied using temperature-dependent measurements and a band diagram is proposed.

Item Type:	Article
Uncontrolled Keywords:	Functionalization; Nanowires; Photoluminescence; SnO2; Sub-wavelength waveguide
Subjects:	CHEMISTRY AND MATERIALS > Chemistry and Materials (General) CHEMISTRY AND MATERIALS > Composite Materials
Depositing User:	Smt Bhagya Rekha KA
Date Deposited:	20 Jul 2022 09:41
Last Modified:	20 Jul 2022 09:41
URI:	http://nal-ir.nal.res.in/id/eprint/13613

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