METHOD FOR FORMATION OF PLASMON NANOSTRUCTURES ON THE SURFACES OF OBJECTS FOR NON-DESTRUCTIVE ANALYSIS OF SMALL CONCENTRATIONS OF CHEMICAL COMPOUNDS BY RAMAN SPECTROSCOPY Russian patent published in 2022 - IPC G01N21/65 B82Y30/00 

FIELD: nanotechnology.

SUBSTANCE: invention relates to the formation of plasmon nanostructures on the surfaces of objects. The essence of the invention lies in the fact that the formation of plasmon nanostructures on the surfaces of objects for non-destructive analysis of small concentrations of chemical compounds in objects by Raman spectroscopy involves obtaining an aerosol stream with nanoparticles in a transport gas stream, heating an aerosol with nanoparticles in a transport gas stream to ensure the production of spherical nanoparticles of the required size from metals, transporting the resulting aerosol stream with nanoparticles to the nozzle head, focusing the aerosol stream of nanoparticles by the nozzle, deposition of nanoparticles from a focused aerosol stream onto the surface of the analyzed object, characterized in that non-agglomerated dry nanoparticles free of solvents, binders and other impurities obtained from plasmon-active metals with modal dimensions providing local amplification of the electromagnetic field of the probing laser radiation of the Raman spectrometer are used, at the same time, nanoparticles are deposited on the surface of the analyzed object at a low speed to ensure sufficiently weak attachment of nanoparticles to the surface of the object with the possibility of their subsequent removal without damaging the object, for example, by blowing off with an inert gas jet, and providing incomplete coverage of the micro-dimensional area of the object’s surface with a monolayer of nanoparticles to maximize the spectrum of surface-enhanced Raman scattering.

EFFECT: providing the possibility of forming plasmon nanostructures on the surfaces of objects, making it possible to perform the surface-enhanced Raman scattering method with high sensitivity while simultaneously providing the possibility of subsequent removal of plasmon nanostructures from the surface of the object without damaging it, which makes this method for analysis non-destructive.

7 cl, 5 dwg