γ-Ray assisted synthesis of silver nanoparticles in chitosan solution and the antibacterial properties

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 155; no. 1; pp. 499 - 507
• Main Authors: Huang, N.M., Radiman, S., Lim, H.N., Khiew, P.S., Chiu, W.S., Lee, K.H., Syahida, A., Hashim, R., Chia, C.H.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 01-12-2009; Elsevier
• Subjects: Applied sciences; Chemical engineering; Chitosan; Electron microscopy; Exact sciences and technology; Nanostructures; Silver; γ-Ray irradiation; Silver; Nanostructures; Chitosan; Electron microscopy; γ-Ray irradiation; Nanoparticle; Bacteria; Nanostructure; Aqueous solution
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2009.07.040

In the present study, chitosan had been utilized as a “green” stabilizing agent for the synthesis of spherical silver nanoparticles in the range of 5–30
nm depending on the percentage of chitosan used (0.1, 0.5, 1.0 and 2.0
wt%) under γ-irradiation. X-ray diffractometer identified the nanoparticles as pure silver having face-centered cubic phase. Ultraviolet–visible spectra exhibited the influence of γ-irradiation total absorbed dose and chitosan concentration on the yield of silver nanoparticles. The antibacterial properties of the silver nanoparticles were tested against Methicillin-resistant
Staphylococcus aureus (MRSA) (gram-positive) and
Aeromonas hydrophila (gram-negative) bacteria. This work provides a simple and “green” method for the synthesis of highly stable silver nanoparticles in aqueous solution with good antibacterial property.