US 12,305,890 B2
Additive manufacturing of metal films
Zhi Zhao, Mesa, AZ (US); Chao Wang, Chandler, AZ (US); and Yu Yao, Chandler, AZ (US)
Assigned to ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, Scottsdale, AZ (US)
Appl. No. 17/628,627
Filed by ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, Scottsdale, AZ (US)
PCT Filed Jul. 8, 2020, PCT No. PCT/US2020/041250
§ 371(c)(1), (2) Date Jan. 20, 2022,
PCT Pub. No. WO2021/015952, PCT Pub. Date Jan. 28, 2021.
Claims priority of provisional application 62/877,140, filed on Jul. 22, 2019.
Prior Publication US 2022/0275972 A1, Sep. 1, 2022
Int. Cl. F24S 23/70 (2018.01); G02B 1/12 (2006.01); G02B 5/08 (2006.01)
CPC F24S 23/82 (2018.05) [G02B 1/12 (2013.01); G02B 5/0808 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of forming a reflector for a concentrated solar power system, the method comprising:
forming a precursor solution comprising a liquid, a compound comprising a metal, and an organic binder;
irradiating the precursor solution with ultraviolet radiation to form a plurality of metal nanoparticles, wherein each of the plurality of metal nanoparticles comprises the metal and the organic binder; and
interconnecting the plurality of metal nanoparticles by the organic binder to form a metal film on a substrate, wherein the substrate has an area of at least 1 square meter and wherein the metal film comprises an RMS surface roughness of about 2 to about 5 nm and a relative reflectivity of about 90% to about 96% at 550 nm,
wherein the organic binder is polyallylamine.