Controlling the Antimicrobial Action of Surface Modified Magnesium Hydroxide Nanoparticles
AbstractMagnesium hydroxide nanoparticles (Mg(OH)2NPs) have recently attracted significant attention due to their wide applications as environmentally friendly antimicrobial nanomaterials, with potentially low toxicity and low fabrication cost. Here, we describe the synthesis and characterisation of a range of surface modified Mg(OH)2NPs, including particle size distribution, crystallite size, zeta potential, isoelectric point, X-ray diffraction (XRD), dynamic light scattering (DLS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). We explored the antimicrobial activity of the modified Mg(OH)2NPs on the microalgae (C. reinhardtii), yeast (S. cerevisiae) and Escherichia coli (E. coli). The viability of these cells was evaluated for various concentrations and exposure times with Mg(OH)2NPs. It was discovered that the antimicrobial activity of the uncoated Mg(OH)2NPs on the viability of C. reinhardtii occurred at considerably lower particle concentrations than for S. cerevisiae and E. coli. Our results indicate that the antimicrobial activity of polyelectrolyte-coated Mg(OH)2NPs alternates with their surface charge. The anionic nanoparticles (Mg(OH)2NPs/PSS) have much lower antibacterial activity than the cationic ones (Mg(OH)2NPs/PSS/PAH and uncoated Mg(OH)2NPs). These findings could be explained by the lower adhesion of the Mg(OH)2NPs/PSS to the cell wall, because of electrostatic repulsion and the enhanced particle-cell adhesion due to electrostatic attraction in the case of cationic Mg(OH)2NPs. The results can be potentially applied to control the cytotoxicity and the antimicrobial activity of other inorganic nanoparticles. View Full-Text
- Supplementary File 1:
PDF-Document (PDF, 11978 KB)
Share & Cite This Article
Halbus, A.F.; Horozov, T.S.; Paunov, V.N. Controlling the Antimicrobial Action of Surface Modified Magnesium Hydroxide Nanoparticles. Biomimetics 2019, 4, 41.
Halbus AF, Horozov TS, Paunov VN. Controlling the Antimicrobial Action of Surface Modified Magnesium Hydroxide Nanoparticles. Biomimetics. 2019; 4(2):41.Chicago/Turabian Style
Halbus, Ahmed F.; Horozov, Tommy S.; Paunov, Vesselin N. 2019. "Controlling the Antimicrobial Action of Surface Modified Magnesium Hydroxide Nanoparticles." Biomimetics 4, no. 2: 41.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.