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Research Article Open Access

Structural, optical and electrical properties of copper oxide nanoparticles prepared through microwave assistance

S. M. Sathiya1, G. S. Okram2, M. A. Jothi Rajan1*

 

 

1Department of Physics, Arul Anandar College (Autonomous), Karumathur, Madurai 625 514, India

2UGC DAE Consortium for Scientific Research, University campus, Khandwa Road, Indore 452001, India

Adv. Mater. Proc., 2017, 2 (6), 371-377

DOI: 10.5185/amp.2017/605

Publication Date (Web):05 June 2017

Copyright © IAAM-VBRI Press

Abstract


Abstract

Microwave assisted co-precipitation method is used to synthesize copper oxide nanoparticles from various concentrations of CuCl2.2H2O (0.1 M - 0.5 M) precursors. Both CuO and Cu2O phases are observed from X-ray diffraction (XRD) pattern and further confirmed from Energy Dispersive X-ray Analysis (EDX) and selected area electron diffraction (SAED) data. The particle size of 43 to 27 nm determined from XRD data using Scherrer formula is in good relation with Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) images. The existence of reasonably uniform size and shape is clear from SEM. The band gaps determined from the UV-Visible absorption peaks and vibrational modes observed from Micro-Raman Scattering (MRS) analysis further confirm the presence of CuO and Cu2O phases. These results are also related to electrical conductivity at low temperatures which illustrate different types of conduction mechanisms. The samples show semiconducting behavior with improved electrical conductivity. Finally, the material is proposed to have applications in designing gas sensors and also in regulating electrical conductivity in drug delivery systems. Copyright © 2017 VBRI Press.

Keywords


Co-precipitation, microwave, concentration, absorption, microstructure, stoichiometry, conductivity.