Method for the synthesis of metallic nano products

摘要

The embodiments herein provide a method of synthesis for metallic nano-products such as metallic nano-antennas, metallic nano-rods, metallic nano-wires, metallic nano-prolate spheroids and metallic nano-oblate spheroids using saturated and unsaturated carboxylic acids. The method involves preparing a reaction mixture by mixing a polar protic solvent, a polar aprotic solvent or a non-polar solvent, a saturated fatty acid or an unsaturated fatty acid and a metallic salt. Then a mixture of reducing agents is prepared by mixing a polar protic solvent, a polar aprotic solvent or a non-polar solvent and a saturated fatty acid or an unsaturated fatty acid. The reaction mixture and the mixture of reducing agents are combined and heated solvo-thermally for a pre-determined period of time at a pre-determined temperature.

主权项

1. A method of synthesizing metallic nano-products comprising the steps of:
a) preparing a reaction mixture by mixing a polar protic solvent, a polar aprotic solvent or a non-polar solvent, a saturated fatty acid or an unsaturated fatty acid and a metallic salt, wherein the metallic salt is a gold salt; b) preparing a mixture of reducing agents by mixing a polar protic solvent, a polar aprotic solvent or a non-polar solvent and a saturated fatty acid or an unsaturated fatty acid; c) combining the reaction mixture and the mixture of reducing agents, wherein a pH is within a range of 3.7 to 5; and d) heating the combined reaction mixture and the mixture of reducing agents for a pre-determined period of time at a pre-determined temperature, and wherein heating is done solvothermally, and wherein the saturated fatty acid or the unsaturated fatty acid is used to adjust a size of a metallic nano-product, and wherein the saturated fatty acid or the unsaturated fatty acid accelerates a major axis growth of the metallic nanoproduct, and wherein the metallic nano-product exhibits localized plasmon-polariton resonance having a first wavelength within a wavelength range of an infrared spectrum and a second wavelength within a wavelength range of a visible light spectrum, and wherein the metallic nano-product is selected from a group consisting of metallic nano-antennas, metallic nano rods, metallic nano-wires, metallic nano-prolate spheroids and metallic nano-oblate spheroids, wherein the metallic nano-products have a dipole or multipole conformation geometrically, and wherein the saturated fatty acid or the unsaturated fatty acid is an surfactant, a reducing agent, a dispersant agent and a capping agent, and wherein the predetermined temperature is within a range of 90° C. to 110° C., and wherein the predetermined period of time is within a range of 10 min to 35 min, and wherein the gold salt is a gold acetylacetonate.