polypyrrole/silver nanocomposite: synthesis, characterization and antibacterial activity

Polypyrrole/silver (ppy/ag)nanocomposite was synthesized by a chemical oxidative method. sem and tem analyses were performedfor studying the morphology of the nanocomposite. it was shown that the obtained nanocomposite particles have a spherical structure with the high surface area to volume ratio that is the important factor in the biological application. the particle sizes of the ppy/ag were 15–25 nm obtained by tem. the antibacterial property was assessed by disk diffusion method against gram-negative escherichia coli and gram-positive staphylococcus aureus bacteria. the antibacterial mechanism of action for ppy/ag nanocomposite was discussed. ppy/ag showed antibacterial activity against s. aureus (5 ± 0.5 mm) and e. coli (8 ± 0.5 mm). based on satisfactory antibacterial properties of ppy/ag nanocomposite, it could be considered as a suitable material in biomedical applications.