Synthesis and Stabilization of Metal Nanoparticles
Most state-of-the-art solution based techniques to synthesize uniformly sized and distributed nanoparticles use reduction reactions of metal ions consisting of multiple complex steps that use organic solvents, produce undesirable by-products and requ ire additives to protect and stabilize the colloid. The few existing single step processes require exotic polymers, high temperatures and a protective agent. This technology describes a simple, single step process using Hydrogen TetraChloroAurate (II I) Hydrate and a selected Block Copolymer in solution as precursors. The process results in metal nanoparticles by mixing and agitation at 25 degrees Celsius. Other values are:
a)This is a scalable and reversible aqueous process without organic so lvents and does not create by products. It provides control over particle size. b)It uses simple, inexpensive precursors, occurs at room temperature (saving on energy) and uses low quantities of a colloid stabilizer of low molecular weight. c)Unifo rm sized metal (e.g. gold, silver and platinum) nanoparticles are created in a time span of 2 hours.
Metal nanoparticles created through this technology possess desirable properties for applications in photoluminescence and fluorescence based syst ems (markers in bio-systems, fluorescence microscopy, high throughput screening, imaging, etc.), metallic inks, epoxydation of propene, proteomics, genomics, conductive/energetic materials, battery materials, etc.
Categories: Nanotechnology, Materials & Chemicals
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