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Effect of annealing temperature on antimicrobial and structural properties of bio-synthesized zinc oxide nanopeprintss using flower extract of Anchusa italica

Azizi, Susan and Mohamad, Rosfarizan and Bahadoran, Azadeh and Bayat, Saadi and Abdul Rahim, Raha and Ariff, Arbakariya and Saad, Wan Zuhainis (2016) Effect of annealing temperature on antimicrobial and structural properties of bio-synthesized zinc oxide nanopeprintss using flower extract of Anchusa italica. Journal of Photochemistry and Photobiology B: Biology, 161 (6). pp. 441-449. ISSN 1011-1344; ESSN: 1873-2682

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Abstract

The use of nontoxic biological compounds in the synthesis of nanomaterials is an economic and eco-friendly approach. The present work was undertaken to develop zinc oxide nanoparticles (ZnO-NPs) by a green method using simple precursor from the solution consisting of zinc acetate and the flower extract of Anchusa italica (A. italica). Effect of annealing temperature on structural and antimicrobial properties was investigated. The crystalline structure of ZnO-NPs was shown using X-ray diffraction (XRD) analysis. Transmission electron microscopy (TEM) results showed that ZnO-NPs are hexagonal in shapes with mean particle size of ~8 and ~14nm at 100°C and 200°C annealing temperatures respectively. The optical band gap was increased from 3.27eV to 3.30eV with the decreasing of the particle size. The antimicrobial activity of ZnO-NPs towards Gram positive (Bacillus megaterium and Stapphylococcus aureus) and Gram negative (Escherichia coli and Salmonella typhimurium) pathogens decreased with the increasing of the heat treating temperature. In vitro cytotoxicity studies on Vero cells, a dose dependent toxicity with non-toxic effect of concentration below 142μg/mL was shown. The results indicated that A. italica is an appropriate reaction media to prepare ZnO-NPs for cosmetic and bio-medical productions.

Item Type:Article
Keyword:Anchusa italica; Antimicrobial; Green synthesis; ZnO nanoparticles; Annealing temperature
Faculty or Institute:Faculty of Biotechnology and Biomolecular Sciences
Institute of Bioscience
Publisher:Elsevier
DOI Number:10.1016/j.jphotobiol.2016.06.007
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi= 10.1016/j.jphotobiol.2016.06.007
ID Code:55590
Deposited By: Mohd Hafiz Che Mahasan
Deposited On:14 Aug 2017 11:48
Last Modified:14 Aug 2017 11:48

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