US 12,325,660 B1
Method to create hydrophilic antimicrobial diamond coating
Anirudha V. Sumant, Plainfield, IL (US); and Shikai Deng, Shanghai (CN)
Assigned to UNITED STATES DEPARTMENT OF ENERGY, Washington, DC (US)
Filed by United States Department of Energy, Washington, DC (US)
Filed on Jan. 17, 2024, as Appl. No. 18/414,761.
Int. Cl. C03C 17/36 (2006.01); A01N 59/16 (2006.01); A01P 1/00 (2006.01); C23C 16/27 (2006.01); C23C 16/511 (2006.01); C23C 16/56 (2006.01); C23C 28/00 (2006.01)
CPC C03C 17/3607 (2013.01) [A01N 59/16 (2013.01); A01P 1/00 (2021.08); C03C 17/3634 (2013.01); C03C 17/3644 (2013.01); C23C 16/274 (2013.01); C23C 16/277 (2013.01); C23C 16/511 (2013.01); C23C 16/56 (2013.01); C23C 28/322 (2013.01); C23C 28/34 (2013.01); C03C 2217/75 (2013.01); C03C 2218/112 (2013.01); C03C 2218/153 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for creating a hydrophilic antimicrobial diamond coating on a silicon or glass surface comprising the steps of:
providing a silicon or glass surface;
creating a second surface by seeding a plurality of nanodiamond particles on the silicon or glass surface by microwave plasma chemical vapor deposition (MPCVD) such that each of the plurality of nanodiamond particles has a grain size of approximately 2-5 nm;
forming a silver nitrate and hydroxylamine solution by mixing a silver nitrate solution of approximately 0.03-0.08 mg/L with hydroxylamine at a predetermined temperature;
creating a third surface comprising:
seeding a plurality of silver nanoparticles onto the second surface by spraying the silver nitrate and hydroxylamine solution onto the second surface, and
maintaining the silver nitrate and hydroxylamine solution on the second surface for a predetermined time; and
exposing the third surface to an oxygen plasma treatment for 10-40s, at a power of approximately 40 W, a pressure of 100-200 mTorr, and an oxygen flow rate of 20-25 sccm.