OPTICAL SENSOR WITH A PLASMONIC STRUCTURE FOR DETERMINING LOW CONCENTRATIONS OF FLUORESCENT AMINO ACIDS IN A PLATELET AND A METHOD FOR PRODUCING IT Russian patent published in 2023 - IPC G01N21/65 

FIELD: optical engineering.

SUBSTANCE: invention relates to the field of optical sensors based on the effect of fluorescence amplification by the electromagnetic field of plasmons. A method for producing an optical sensor consisting of a chemically synthesized platinum plasmonic nanoparticle in the state of a colloidal solution of monometallic platinum nanospheres with a maximum size distribution of 28 nm, in which a spherical platinum nanoparticle stabilized by an ethylene glycol shell is chemically synthesized, while 1 ml of a one-molar aqueous salt solution of H₂PtCl₆ acid diluted in ethylene glycol is placed in a flask, then the solution is diluted to a concentration of 80 mM, after which 7 ml of ethylene glycol are added, in which 30 mM PVP and 30 mM NaNO₃ are dissolved, at a total system temperature of 160°C achieved by heating on a magnetic stirrer for 15 minutes, while using a reflux condenser.

EFFECT: signal amplification from low, close to physiological, concentrations of fluorescent amino acids.

2 cl, 3 dwg