Patent ID: 9034075
Filing Date: 2015-05-19
Classification: B22F,B82Y,H01B

Abstract:
1. A process for manufacturing high aspect ratio silver nanowires, comprising: providing a sugar component containing a reducing sugar, wherein the sugar component is prepared by adding the reducing sugar to a first volume of water, wherein the reducing sugar is selected from the group consisting of glucose, galactose, mannose, fructose, sucrose and maltose; providing a polyvinyl pyrrolidone (PVP) component, wherein the PVP component is prepared by adding polyvinyl pyrrolidone to a second volume of water; providing a copper component containing copper (II) ions, wherein the copper component is prepared by adding a source of copper (II) ions to a third volume of water; providing a halide component containing halide ions, wherein the halide component is prepared by adding a source of halide ions to a fourth volume of water; providing a silver component containing silver ions, wherein the silver component is prepared by adding a source of silver ions to a fifth volume of water; adding the sugar component and the PVP component to a container; adding the copper component and the halide component to the container; adding the silver component to the container with agitation; maintaining the container contents at 110 to 160° C. throughout the addition of the silver component and following the addition of the silver component for a hold period of 8 to 30 hours producing silver nanowires; and, recovering the silver nanowires from the container contents; wherein the container contents exhibit a total glycol concentration of <0.001 wt % at all times during the process; wherein the weight ratio of polyvinyl pyrrolidone to silver added to the container is 4:1 to 10:1; wherein the weight ratio of halide ions to copper (II) ions added to the container is 1:1 to 5:1; wherein the recovered silver nanowires exhibit an average diameter of 25 to 80 nm and an average length of 10 to 100 μm.