Magnetic properties of nanocrystalline CoFe2O4 powders prepared at room temperature: variation with crystallite size

Synthesis and characterization of cobalt ferrites nanoparticles with cytotoxic and antimicrobial properties

“…In the same trend the rate of inhibition of E.coli was higher than that of S. aureus. The current results are in good harmony with several authors who reported that the nanocomposites of CoFe 2 O 4 (Sanpo et al, 2013), polyaniline and nanosilver (Kooti et al, 2014), and CoFe 2 O 4 /SiO2/Ag composite (Kooti et al, 2015) showed high antibacterial activity. Moreover, Antoniea et al (2012) found that the magnetite and (CoFe 2 O 4 ) NPs induced the most significant effects in S. aureus and B. subtilis.…”

“…The ABTS radical scavenging activity of (CoFe 2 O 4 ) NPs was determined according to the method described by Re et al (1999). The reaction between 7 mM ABTS and 2.45 mM potassium persulfate in H 2 O made the ABTS .+ radical cation.…”

“…The antimicrobial activity of the nanoparticles is known to be the function of surface area which is adhesion to the microorganisms. The small size and the high surface to volume ratio i.e., large surface area enhances the interaction between the nanoparticles and the microbes to carry out a broad range of probable antimicrobial activities (Ravishankar and Jamuna, 2011). Moreover, Vidya and Venkatesan (2015) suggested that nanoparticle bind to the membranes of microorganisms which can prolong the lag phase of the growth cycle and increase the generation time of the organisms.…”

“…Nanomaterials are rapidly expanding and used in various areas of research, such as food, feed, health management and environmental aspects (Bouwmeester et al 2007;Kiruba Daniel et al 2013). Metal-oxide nanoparticles draw attention due to their unique magnetic properties and other characteristics such as excellent chemical stability and mechanical hardness (Meng et al, 2009;Phua et al, 2009;Sanpo et al, 2013). Cobalt ferrite (CoFe 2 O 4 ) nanoparticles offer potential applications in several fields such as food, medicine, cancer treatment (Jamon et al, 2009) and other applications (Amiri and Shokrollahi, 2013;Sanpo et al, 2013a).…”

“…The antimicrobial activities of magnetic nanoparticles are well established by Chifiriuc et al (2011). Cobalt ferrites nanoparticles were synthesized using different techniques such as solid state reaction (Rafferty et al, 2008) microemulsion (Choi, 2003), combustion (Yan, 1999) the redox process (Rajendran, 2001), chemical co-precipitation (Pannaparayil and Komarneni, 1989), the hydrothermal method (Daou, 2006), and microwave synthesis (Bensebaa, 2004). Generally, the evaluation of magnetic nanoparticles for drug delivery, and sensing applications are widely studied.…”