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Research Article Open Access

Study of structural, optical and antibacterial properties of starch-capped Cu doped ZnO nanoparticles (NPs)

M. K. Debanath1*, R. K. Saha1, S. M. Borah1, E. Saikia1 and K. K. Saikia2

 

 

1Department of Applied Sciences, Gauhati University, Guwahati, 781014, India

2Department of Bioengineering and Technology, Gauhati University, Guwahati, 781014, India

Adv. Mater. Proc., 2018, 3 (1), 36-40

DOI: 10.5185/amp.2018/721

Publication Date (Web):01 January 2018

Copyright © IAAM-VBRI Press

Abstract


Abstract

In our present investigation, we have synthesized starch-capped Cu doped ZnO (ZnO:Cu) nanoparticles (NPs) by simple wet chemical method and studied their structural, optical and antibacterial effects on/against Gram-positive and Gram-negative bacteria. Chemically synthesized nanoparticle have been characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive analysis of X-rays (EDAX), high resolution transmission electron microscopy (HRTEM), UV-vis absorption spectroscopy and photoluminescence (PL) spectroscopy for their structural and optical properties. Antibacterial properties have been studied by Staphylococcus aureus (S. aureus, Gram-positive) and Escherichia coli (E. coli, Gram-negative) bacteria. XRD study showed hexagonal wurtzite crystal structure of the prepared ZnO:Cu and nanoformation of the as-synthesized NPs. Nanoparticle formation have been finally confirmed by HRTEM analysis. Antibacterial studies showed excellent resistance of ZnO:Cu to S. aureus and E. coli respectively.  Copyright © 2018 VBRI Press.

Keywords


ZnO:Cu nanoparticles; SEM; HRTEM; optical properties; antibacterial activity.