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Article

Enhanced Optical and Antibacterial Activity of Hydrothermally Synthesized Cobalt-Doped Zinc Oxide Cylindrical Microcrystals

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Department of Physics, Hazara University Mansehra, Khyber Pakhtunkhwa 21300, Pakistan
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Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan
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Department of Chemistry, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
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Center for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Bandar Sunway 47500, Selangor, Malaysia
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Space Science Centre, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia
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Department of Biotechnology, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan
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Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
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Department of Physics, University of Surrey, Guilford GU2 7XH, UK
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Authors to whom correspondence should be addressed.
Academic Editor: Marta Miola
Materials 2021, 14(12), 3223; https://doi.org/10.3390/ma14123223
Received: 3 May 2021 / Revised: 4 June 2021 / Accepted: 7 June 2021 / Published: 11 June 2021
Cobalt (Co) doped zinc oxide (ZnO) microcrystals (MCs) are prepared by using the hydrothermal method from the precursor’s mixture of zinc chloride (ZnCl2), cobalt-II chloride hexahydrate (CoCl2·6H2O), and potassium hydroxide (KOH). The smooth round cylindrical morphologies of the synthesized microcrystals of Co-doped ZnO show an increase in absorption with the cobalt doping. The antibacterial activity of the as-obtained Co-doped ZnO-MCs was tested against the bacterial strains of gram-negative (Escherichia coli, Klebsiella pneumonia) and gram-positive bacteria (Staphylococcus aureus, Streptococcus pyogenes) via the agar well diffusion method. The zones of inhibition (ZOI) for Co-doped ZnO-MCs against E. coli and K. pneumoniae were found to be 17 and 19 mm, and 15 and 16 mm against S. Aureus and S. pyogenes, respectively. The prepared Co-doped ZnO-MCs were thus established as a probable antibacterial agent against gram-negative bacterial strains. View Full-Text
Keywords: cobalt-doping; microcrystals; absorption; antibacterial; synthesis cobalt-doping; microcrystals; absorption; antibacterial; synthesis
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MDPI and ACS Style

Khalid, A.; Ahmad, P.; Alharthi, A.I.; Muhammad, S.; Khandaker, M.U.; Faruque, M.R.I.; Khan, A.; Din, I.U.; Alotaibi, M.A.; Alzimami, K.; Alfuraih, A.A.; Bradley, D.A. Enhanced Optical and Antibacterial Activity of Hydrothermally Synthesized Cobalt-Doped Zinc Oxide Cylindrical Microcrystals. Materials 2021, 14, 3223. https://doi.org/10.3390/ma14123223

AMA Style

Khalid A, Ahmad P, Alharthi AI, Muhammad S, Khandaker MU, Faruque MRI, Khan A, Din IU, Alotaibi MA, Alzimami K, Alfuraih AA, Bradley DA. Enhanced Optical and Antibacterial Activity of Hydrothermally Synthesized Cobalt-Doped Zinc Oxide Cylindrical Microcrystals. Materials. 2021; 14(12):3223. https://doi.org/10.3390/ma14123223

Chicago/Turabian Style

Khalid, Awais; Ahmad, Pervaiz; Alharthi, Abdulrahman I.; Muhammad, Saleh; Khandaker, Mayeen U.; Faruque, Mohammad R.I.; Khan, Abdulhameed; Din, Israf U.; Alotaibi, Mshari A.; Alzimami, Khalid; Alfuraih, Abdulrahman A.; Bradley, David A. 2021. "Enhanced Optical and Antibacterial Activity of Hydrothermally Synthesized Cobalt-Doped Zinc Oxide Cylindrical Microcrystals" Materials 14, no. 12: 3223. https://doi.org/10.3390/ma14123223

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