SYSTEMS AND METHODS FOR FABRICATION OF NANOSTRUCTURES
Systems and methods for fabricating nanostructures using other nanostructures as templates. A method includes mixing a dispersion and a reagent solution. The dispersion includes nanostructures such as nanowires including a first element such as copper. The reagent solution includes a second element such as silver. The second element at least partially replaces the first element in the nanostructures. The nanostructures are optionally washed, filtered, and/or deoxidized.
1 . A method comprising:
mixing a dispersion and a reagent solution, the dispersion including nanostructures comprising a first element, the reagent solution including a second element, the second element at least partially replacing the first element in the nano structures.
2 . The method of claim 1 , wherein the nanostructures comprise nanowires.
3 . The method of claim 1 , wherein the first element is copper.
4 . The method of claim 1 , wherein the second element is silver.
5 . The method of claim 1 , wherein a concentration of the nanostructures in the dispersion is between about 0.1 g/L and about 1 g/L.
6 . The method of claim 1 , wherein the dispersion includes at least one selected from a group consisting of dispersants and surfactants.
7 . The method of claim 1 , wherein a concentration of the reagent solution is between about 0.1 M and about 0.15 M.
8 . The method of claim 1 , wherein the reagent solution comprises at least one selected from a group consisting of silver nitrate and silver ions.
9 . A dispersion comprising:
a solvent; and
nanowires comprising silver and having a length greater than about 10 microns in a dimension, the nanowires dispersed in the solvent.
10 . The dispersion of claim 9 , wherein the length is greater than about 25 microns in the dimension.
11 . The dispersion of claim 9 , wherein the nanowires comprise at least about 10% silver.
12 . The dispersion of claim 9 , wherein the nanowires in films have a resistivity less than about 7.5×10 3 Ωm in a 2.0 vol % nanowires/low density polyethylene.
13 . The dispersion of claim 9 , wherein the nanowires in dispersion have a visible light transmittance greater than about 70% at a resistance of 15 Ω/sq.
14 . A method comprising:
filtering a dispersion including nano structures.
15 . The method of claim 14 , wherein the nanostructures comprise nanowires.
16 . The method of claim 14 , wherein the nanostructures comprise copper.
17 . The method of claim 14 , wherein filtering the nanostructures includes using a non-fibrous filter.
18 . The method of claim 14 , further comprising dispersing the nanostructures in a solvent.
19 . The method of claim 14 , further comprising deoxidizing the nano structures.
20 . The method of claim 19 , wherein deoxidizing comprises mixing an acid and a first dispersion including oxidized nanostructures.