Characterization and antimicrobial activity of silver nanoparticles prepared by a thermal decomposition technique |
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Authors: | Le Thi Tam Vu Ngoc Phan Hoang Lan Nguyen Thanh Thuy Tran Minh Hien Tran Quang Huy Nguyen Van Quy Huynh Dang Chinh Le Minh Tung Pham Anh Tuan Vu Dinh Lam Anh-Tuan Le |
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Affiliation: | 1. Department of Nanoscience and Nanotechnology, Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), No. 1, Dai Co Viet Street, Hai Ba Trung District, Hanoi, Vietnam 2. National Institute of Hygiene and Epidemiology (NIHE), No. 1, Yecxanh Street, Hai Ba Trung District, Hanoi, Vietnam 3. International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), 01 Dai Co Viet Street, Hai Ba Trung District, Hanoi, Vietnam 4. School of Chemical Engineering, Hanoi University of Science and Technology (HUST), 01 Dai Co Viet Street, Hai Ba Trung District, Hanoi, Vietnam 5. Department of Physics, Tien Giang University, My Tho City, Tien Giang Province, Vietnam 6. Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam
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Abstract: | Recently, there has been an increasing need of efficient synthetic protocols using eco-friendly conditions including low costs and green chemicals for production of metal nanoparticles. In this work, silver nanoparticles (silver NPs) with average particle size about 10 nm were synthesized by using a thermal decomposition technique. Unlike the colloidal chemistry method, the thermal decomposition method developed has advantages such as the high crystallinity, single-reaction synthesis, and easy dispersion ability of the synthesized NPs in organic solvents. In a modified synthesis process, we used sodium oleate as a capping agent to modify the surface of silver NPs because the oleate has a C18 tail with a double bond in the middle, therefore, forming a kink which is to be effective for aggregative stability. Importantly, the as-synthesized silver NPs have demonstrated strong antimicrobial effects against various bacteria and fungi strains. Electron microscopic studies reveal physical insights into the interaction and bactericidal mechanism between the prepared silver NPs and tested bacteria in question. The observed excellent antibacterial and antifungal activity of the silver NPs make them ideal for disinfection and biomedicine applications. |
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