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Synthesis of Cysteine Capped Silver Nanoparticles by Electrochemically Active Biofilm and their Antibacterial Activities
Bulletin of Korean Chemical Society (2012)
  • Mohammad Mansoob Khan, Dr
  • Yeungnam University, Yeungnam University
  • Yeungnam University, Yeungnam University
  • M. H. Cho, Dr
Abstract
Cysteine capped silver nanoparticles (Cys-AgNPs) have been synthesized by employing electrochemically active biofilm (EAB), AgNO3 as precursor and sodium acetate as electron donor in aqueous solution at 30 oC. Cys-AgNPs of 5-10 nm were synthesized and characterized by UV-Vis, FT-IR, XRD and TEM. Capping of the silver nanoparticles with cysteine provides stability to nanoparticles by a thiolate bond between the amino acid and the nanoparticle surface and hydrogen bonding among the Cys-AgNPs. In addition, the antibacterial effects of as-synthesized Cys-AgNPs have been tested against two pathogenic bacteria Escherichia coli (O157:H7) and Pseudomonas aeruginosa (PAO1). The results demonstrate that the as-synthesized Cys-AgNPs can proficiently inhibit the growth and multiplication of E. coli and P. aeruginosa.
Keywords
  • Cys-AgNPs,
  • Silver colloidal nanoparticles,
  • (L)-Cysteine,
  • Electrochemically active biofilm (EAB),
  • Hydrogen bonding
Disciplines
Publication Date
Summer July 19, 2012
Citation Information
Mohammad Mansoob Khan, Yeungnam University, Yeungnam University and M. H. Cho. "Synthesis of Cysteine Capped Silver Nanoparticles by Electrochemically Active Biofilm and their Antibacterial Activities" Bulletin of Korean Chemical Society Vol. 33 Iss. 8 (2012)
Available at: http://works.bepress.com/mmansoob_khan/18/