US 12,378,467 B2
Tracer including zinc oxide quantum dots embedded in silica
Zain H. Yamani, Dhahran (SA); Safyan A. Khan, Dhahran (SA); Shahid Ali, Dhahran (SA); and Mohammed Al-Jabari, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA); and King Fahd University of Petroleum & Minerals, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA); and King Fahd Univerisity of Petroleum & Minerals, Dhahran (SA)
Filed on Nov. 3, 2019, as Appl. No. 16/672,478.
Prior Publication US 2021/0130681 A1, May 6, 2021
Int. Cl. E21B 47/11 (2012.01); C01G 9/02 (2006.01); C09K 8/60 (2006.01); C09K 11/02 (2006.01); C09K 11/54 (2006.01); E21B 43/34 (2006.01); B82Y 15/00 (2011.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01)
CPC C09K 11/02 (2013.01) [C01G 9/02 (2013.01); C09K 8/60 (2013.01); C09K 11/54 (2013.01); E21B 47/11 (2020.05); B82Y 15/00 (2013.01); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2004/64 (2013.01); C01P 2006/60 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method, comprising:
dissolving zinc acetate dihydrate in ethanol to form a first solution;
mixing lithium hydroxide with the first solution to form a first mixture;
stirring the first mixture to form zinc oxide quantum dots, wherein the first mixture comprising the zinc oxide quantum dots has a potential of hydrogen (pH) in a range of from about 8 to about 9;
separating the zinc oxide quantum dots from a remaining portion of the first mixture; and
dispersing the zinc oxide quantum dots in ethanol to form a first colloidal dispersion.