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Nonequilibrium Microstructures for Ag-Ni Nanowires

Rai, Rajesh K and Srivastava, Chandan (2015) Nonequilibrium Microstructures for Ag-Ni Nanowires. In: MICROSCOPY AND MICROANALYSIS, 21 (2). pp. 491-497.

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Official URL: http://dx.doi.org/10.1017/S1431927615000069

Abstract

This work illustrates that a variety of nanowire microstructures can be obtained either by controlling the nanowire formation kinetics or by suitable thermal processing of as-deposited nanowires with nonequilibrium metastable microstructure. In the present work, 200-nm diameter Ag-Ni nanowires with similar compositions, but with significantly different microstructures, were electrodeposited. A 15 mA deposition current produced nanowires in which Ag-rich crystalline nanoparticles were embedded in a Ni-rich amorphous matrix. A 3 mA deposition current produced nanowires in which an Ag-rich crystalline phase formed a backbone-like configuration in the axial region of the nanowire, whereas the peripheral region contained Ni-rich nanocrystalline and amorphous phases. Isothermal annealing of the nanowires illustrated a phase evolution pathway that was extremely sensitive to the initial nanowire microstructure.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the CAMBRIDGE UNIV PRESS, 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
Keywords: Ag-Ni; nanowires; electrodeposition; phase transformation
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 22 May 2015 07:40
Last Modified: 22 May 2015 07:40
URI: http://eprints.iisc.ac.in/id/eprint/51571

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