[Use of the materials based on partially reduced graphene-oxide with silver nanoparticle as bacteriostatic and...

Researches have been synthesizing nanocomposites with antibacterial properties for a dozen of years. A lot of study have confirmed a high antibacterial activity of silver nanoparticles and oxygraphene. Silica, titanium dioxide and hydroxyapatites of 1-100 nm are used as carrier for these composites.

To synthesise graphene-silver nanocomposites and to determine their antibacterial properties.

The following bacteria strains from the American Type Culture Collection were tested: Staphylococcus aureus ATCC 6538 (Gram-positive bacteria), Escherichia coli ATCC 11229 (Gram-negative bacteria), Klebsiella pneumoniae ATCC 4352 (Gram-negative bacteria). Clinical isolates of bacteria strains (from wounds) were also tested (from species of Staphylococcus aureus, Escherichia coli and Klebsiella pneumoniae). The antibacterial effect of nanocomposites was determined by minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) values according to the reference methods of Clinical and Laboratory Standards Institute (CLSI) for the determination of MICs of aerobic bacteria by broth microdilution. The samples have physical and chemical characteristics.

The results showed bacteriostatic (0.4-1.6 microg/ml) and bactericidal (0.4-3.2 microg/ml) efficacy of composities.

The synthesized nanocomposites of graphene-oxide can be used in biology and medicine as bacteriostatic and bactericidal factor and may be used as an alternative to antibiotics and chemioterapeutics.