Title: Novel silver nanoparticles: synthesis, properties and applications

Authors: Anh-Tuan Le, Pham Thanh Huy, Le Thi Tam, Phuong Dinh Tam, Nguyen Van Hieu, Tran Quang Huy

Addresses: Department of Nanoscience and Nanotechnology, Hanoi Advanced School of Science and Technology (HAST), Hanoi University of Technology, F building, 40 Ta Quang Buu Street, Hanoi, Vietnam. ' Department of Nanoscience and Nanotechnology, Hanoi Advanced School of Science and Technology (HAST), Hanoi University of Technology, F building, 40 Ta Quang Buu Street, Hanoi, Vietnam. ' Department of Nanoscience and Nanotechnology, Hanoi Advanced School of Science and Technology (HAST), Hanoi University of Technology, F building, 40 Ta Quang Buu Street, Hanoi, Vietnam. ' Department of Nanoscience and Nanotechnology, Hanoi Advanced School of Science and Technology (HAST), Hanoi University of Technology, F building, 40 Ta Quang Buu Street, Hanoi, Vietnam. ' Laboratory of Microsystem and Sensors Technology, International Training Institute of Materials Science (ITIMS), Hanoi University of Technology, 01 Dai Co Viet Street, Hanoi, Vietnam. ' Laboratory of Electron Microscopy, National Institute of Hygiene and Epidemiology, 01 Yersin, Hai Ba Trung District, Hanoi, Vietnam

Abstract: In this paper, we present versatile and effective techniques to synthesise silver nanoparticles (Ag-NPs)-based compounds such as colloidal silver nanoparticles (CSNPs) and silver nanoparticles powders (SNPPs). The CSNPs stabilised by a surfactant oleic acid were produced for the first time through the reduction of [Ag(NH₃)₂]+(aq) complex by glucose with UV irradiation treatment, while the SNPPs were formed by thermal decomposition of silver-oleate complex at 330°C for 1 h. The CNPPs and CSNPs with average diameters (~9–10 nm) and highly stableaqueous dispersions were obtained. Noticeably, these synthesised Ag-NPs exhibited an excellent antibacterial activity against gram-negative Escherichia coli (ATCC 43888-O157:k-:H7) and methicillin-resistant gram-positive Staphylococcus aureus (ATCC 43300) bacteria. The electron microscopic technique provided deeper insights on the interaction and bactericidal mechanism of the Ag-NPs. Potential applications of the synthesised CSNPs and SNPPs for antibacterial – masterbatchs, acrylic emulsion paint as well as coating layer on cotton textiles were demonstrated.

Keywords: silver nanoparticles; green synthesis; thermal decomposition; modified Tollens process; colloids; antibacterial effect.

DOI: 10.1504/IJNT.2011.038205

International Journal of Nanotechnology, 2011 Vol.8 No.3/4/5, pp.278 - 290

Published online: 21 Jan 2011 *

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