Fabrication of vertically aligned stand alone ZnO nanowire by template assisted approach

Silambarasan , T and Soma, Dutta (2012) Fabrication of vertically aligned stand alone ZnO nanowire by template assisted approach. In: 17th National Seminar on Ferroelectrics and Dielectrics (NSFD-2012), 17-19 December 2012, Bhubaneswar, Odissa.

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    Abstract

    In this paper we report the fabrication of ZnO nanowire towards the development of Nanogenerator. High density nano porous array is created on Aluminum coated Silicon substrate by template assisted approach. This is an innovative approach of the present research since the template is grown on the same substrate on which the nano-wires are developed later. Various electrolytes (Sulphuric acid, Oxalic acid and Phosphoric acid) are used for Anodization of Aluminum to study the effect of electrolyte on pore size and their hexagonal structural arrangements. Effect of voltage on pore size and physical properties of the nano template is studied in details. During anodization oxygen molecules in electrolyte reacts with Al film and forms porous Al2O3 (Alumina) on the substrate. For a particular voltage, pore size of the template varies depending on the electrolytes used. Generally for H2SO4 electrolyte, the pore size of the template is found in between 30-35nm when the voltage is applied in the range 25-27V. Further ZnO thin film is deposited by RF Magnetron Sputtering. By removing the alumina template ZnO nanowire array is exposed. By abiding the principle of piezoelectricity, it produces electrical energy when stress is applied. The efficiency of the nanowire based piezoelectric power generator is estimated to be 17 to 30%.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Nanogenerator, ZnO nanowire
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Materials Science Division, Materials Science Division
    Depositing User: Ms Indrani V
    Date Deposited: 18 Apr 2013 13:49
    Last Modified: 18 Apr 2013 13:49
    URI: http://nal-ir.nal.res.in/id/eprint/11590

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