Biosynthesis of silver nanoparticles.

Journal of nanoscience and nanotechnology (2014-04-23)
Subin Poulose, Tapobrata Panda, Praseetha P Nair, Thomas Théodore
摘要

Metal nanoparticles have unique optical, electronic, and catalytic properties. There exist well-defined physical and chemical processes for their preparation. Those processes often yield small quantities of nanoparticles having undesired morphology, and involve high temperatures for the reaction and the use of hazardous chemicals. Relatively, the older technique of bioremediation of metals uses either microorganisms or their components for the production of nanoparticles. The nanoparticles obtained from bacteria, fungi, algae, plants and their components, etc. appear environment-friendly, as toxic chemicals are not used in the processes. In addition to this, the formation of nanoparticles takes place at almost normal temperature and pressure. Control of the shape and size of the nanoparticles is possible by appropriate selection of the pH and temperature. Three important steps are the bioconversion of Ag+ ions, conversion of desired crystals to nanoparticles, and nanoparticle stability. Generally, nanoparticles are characterized by the UV-visible spectroscopy and use of the electron microscope. Silver nanoparticles are used as antimicrobial agents and they possess antifungal, anti-inflammatory, and anti-angiogenic properties. This review highlights the biosynthesis of silver nanoparticles by various organisms, possible mechanisms of their synthesis, their characterization, and applications of silver nanoparticles.

材料
货号
品牌
产品描述

Sigma-Aldrich
银, conductive paste
Sigma-Aldrich
银纳米线悬浮液, diam. × L 60 nm × 10 μm, 0.5% (isopropyl alcohol suspension)
Sigma-Aldrich
银纳米线悬浮液, diam. × L 120-150 nm × 20-50 μm, 0.5% (isopropyl alcohol suspension)
Sigma-Aldrich
银纳米线悬浮液, diam. × L 115 nm × 20-50 μm, 0.5% (isopropyl alcohol suspension)
Sigma-Aldrich
银, colloidal, 65-75% Ag basis
Sigma-Aldrich
银, foil, thickness 1.0 mm, 99.99% trace metals basis
银, foil, 25x25mm, thickness 1.0mm, as rolled, 99.95+%
Sigma-Aldrich
银, foil, thickness 1.0 mm, 99.9% trace metals basis
银, wire reel, 20m, diameter 0.25mm, annealed, 99.99%
银, insulated wire, 50m, conductor diameter 0.05mm, insulation thickness 0.0075mm, polyester insulation, 99.99%
银, wire reel, 1m, diameter 0.8mm, as drawn, 99.99%
银, insulated wire, 5m, conductor diameter 0.25mm, insulation thickness 0.023mm, polyester insulation, 99.99%
银, wire reel, 10m, diameter 1.0mm, annealed, 99.99%
银, foil, 50x50mm, thickness 3mm, as rolled, 99.95+%
银, rod, 100mm, diameter 2.0mm, as drawn, 99.95+%
银, foil, 100x100mm, thickness 0.5mm, as rolled, 99.99+%
银, wire reel, 10m, diameter 0.125mm, annealed, 99.99%
银, foil, 25x25mm, thickness 1.0mm, as rolled, 99.99+%
银, wire reel, 100m, diameter 0.125mm, annealed, 99.99%
银, wire reel, 10m, diameter 0.05mm, annealed, 99.99%
银, rod, 1000mm, diameter 2.0mm, as drawn, 99.95+%
银, wire reel, 0.2m, diameter 1.0mm, annealed, 99.99%
银, wire reel, 2m, diameter 0.5mm, annealed, 99.99%
银, foil, 15mm disks, thickness 0.005mm, 99.97%
银, foil, 15mm disks, thickness 0.006mm, 99.97%
银, foil, 15mm disks, thickness 0.007mm, 99.97%
银, foil, 15mm disks, thickness 0.008mm, 99.95+%
银, foil, 15mm disks, thickness 0.008mm, 99.97%
银, foil, 15mm disks, thickness 0.009mm, 99.97%
银, foil, 15mm disks, thickness 0.0125mm, 99.95+%