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Journal of Nanomaterials
Volume 2016 (2016), Article ID 6134801, 9 pages
http://dx.doi.org/10.1155/2016/6134801
Research Article

γ-Rays Irradiation Induced Structural and Morphological Changes in Copper Nanowires

1National Center for Physics, Quaid-i-Azam University, Islamabad 44000, Pakistan
2Center of Excellence in Solid State Physics, University of Punjab, QAC, Lahore 54590, Pakistan
3UNESCO-UNISA Africa Chair in Nanoscience/Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, P.O. Box 392, Pretoria, South Africa
4Nanoscience African Network (NANOAFNET), iThemba LABS National Research Foundation, 1 Old Faure Road, P.O. Box 722, Somerset West, Western Cape 7129, South Africa
5Department of Physics, Quaid-i-Azam University, Islamabad 44000, Pakistan
6School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

Received 22 May 2016; Accepted 27 June 2016

Academic Editor: Philippe Caroff

Copyright © 2016 H. Shehla et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This contribution reports on the effect of γ-irradiations on the structural and morphological properties of copper nanowires (Cu-NWs) within the γ doses varying from 6 to 25 kGy. At 9 kGy, the Cu-NWs started welding, forming perfect X-, V-, II-, and Y-shaped molecular junctions. Further increasing the γ dose up to 15 kGy caused the Cu-NWs to fuse and form larger diameter NWs. At the highest dose of 25 kGy, the nanowires converted into a continuous Cu thin film. However, X-ray diffraction (XRD) results showed that the structure of the Cu-NWs remained stable even after converting into a thin film. The formation of the Cuprite (Cu2O) phases was observed at higher γ dose. The mechanism of forming welded networks of Cu-NWs and Cu thin films is explained via the short and high energy γ-ray wavelengths which act on Cu-Cu molecular covalent bonds isotropically.