Title: Synthesis and characterisation of CZT nanowire arrays for gamma ray detection

Authors: T. Gandhi, K.S. Raja, I. Chatterjee, M. Misra, X. Luo, P. Dzurella

Addresses: Department of Materials and Metallurgical Engineering, University of Nevada, Reno, NV-89557, USA. ' Department of Materials and Metallurgical Engineering, University of Nevada, Reno, NV-89557, USA. ' Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV-89557, USA. ' Department of Materials and Metallurgical Engineering, University of Nevada, Reno, NV-89557, USA. ' Department of Materials and Metallurgical Engineering, University of Nevada, Reno, NV-89557, USA. ' Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV-89557, USA

Abstract: A single step pulsed potential electrodeposition of cadmium zinc telluride (CZT) nanowires was carried out in propylene carbonate solution at 130°C onto a nanotubular TiO2 template. Various combinations of potential pulses were investigated and the electrochemical parameters were optimised to obtain nanowires with a stoichiometry of Cd0.96Zn0.04Te. The CZT nanowires showed an electrical resistivity of 4.48 × 109 Ω-cm and an electronic band gap of 1.53 eV after annealing at 350°C for 1 h in argon atmosphere. The CZT nanowires grown on semiconductor nanotubular TiO2 templates can be integrated into a detection device for sensing low-medium energy gamma rays.

Keywords: electrodeposition; CZT; cadmium zinc telluride; band gap; resistivity; nanowires; gamma ray detectors; nanosensors; nanotechnology; nanotubes.

DOI: 10.1504/IJNT.2008.017452

International Journal of Nanotechnology, 2008 Vol.5 No.4/5, pp.519 - 533

Available online: 07 Mar 2008 *

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