Sol–gel auto-combustion mediated cobalt ferrite nanoparticles: a potential material for antimicrobial applications
Abstract
Abstract
In the era of nanotechnology, nanoparticles (NPs) of metals and metal oxides/chalcogenides are widely been used in medical applications where antibiotic-resistant microorganisms become a serious threat to the human health. Cobalt ferrite (CoFe
2
O
4
) NPs, synthesized by a simple and cost-effective sol–gel auto-combustion method are envisaged for in vitro antimicrobial activities against Gram-positive bacteria (
Bacillus subtilis; Staphylococcus aureus
) and Gram-negative bacteria (
Escherichia coli; Pseudomonas aeruginosa
). The structure, morphology, elemental analyses and surface area of CoFe
2
O
4
NPs are initially screened. The antimicrobial efficiency of CoFe
2
O
4
NPs is found to be optimum against the Gram-negative bacteria
Escherichia coli
(15 mm). In addition, membrane leakage assays performed to evaluate the intracellular cytoplasmic leakage with CoFe
2
O
4
NPs demonstrate the ability to destroy the bacterial membrane integrity, confirming their antimicrobial potential.
Keywords
- Antimicrobial activity,
- Membrane damage,
- Cobalt ferrite nanoparticles (CoFe2O4 NPs),
- Sol–gel auto-combustion method
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