METHOD FOR DETECTING THE GLASS TRANSITION TEMPERATURE OF NANOSCALE POLYMER MATERIALS AND A THERMO-PLASMONIC HEATER FOR IMPLEMENTING THE METHOD Russian patent published in 2022 - IPC G01N25/02 G01N21/65 G01J3/44 G01K11/00 B82B3/00 B82Y40/00 

FIELD: nanotechnology.

SUBSTANCE: claimed group of inventions relates to the field of thermos-plasmonics, namely, a device that provides the possibility of local heating of the nanoscale material under study under the action of continuous laser radiation and a method for detecting the glass transition temperature of nanoscale polymer materials using this device with nanometer spatial resolution remotely (without affecting the nanoscale material under study) using Raman spectroscopy. The essence of the claimed technical solution is a method for detecting the glass transition temperature of nanoscale polymer materials, which consists in taking a nanoscale polymer material, placing it on the upper surface of a thermo-plasmonic heater, then applying continuous laser radiation to a thermos-plasmonic heater with a nanoscale material. In this case, the heating temperature is regulated by the power of laser radiation with a step-by-step change in power from 1 mW to 16 mW in 0.1 mW increments, and the plasmon nanostructures of the thermo-plasmonic heater generate heat with a temperature change depending on the change in laser radiation power. The nanoscale material is heated locally with a temperature change in the range from 0.1°C to 280°C, depending on the temperature change of the plasmon nanostructures, and heating is carried out to a temperature presumably exceeding the glass transition temperature. The Raman scattering spectra of light are measured at each point of the heating temperature of the nanoscale material under study, then the heating temperature of the nanoscale material is determined using the Raman scattering spectra. A graph of the temperature dependence of the spectroscopic characteristics of the Raman spectrum lines is constructed, then using the method for calculating the cumulative Pearson correlation according to the constructed graph of the temperature dependence of the spectroscopic characteristics of the Raman spectrum lines, the glass transition temperature of a nanoscale material is detected by the temperature at which an inflection is observed on the graph. A thermo-plasmonic heater is also claimed to implement the claimed method, containing a substrate and an array of plasmonic nanostructures located on it, and the substrate material is selected from a number of: silicon, silicon oxide, aluminum oxide, magnesium oxide, mica, the material of plasmonic nanostructures is selected from a number of transition metal nitrides, while the substrate has an arbitrary shape. In this case, plasmonic nanostructures have an arbitrary uniform shape and the same size in the lateral size range of 10-1000 nm and height of 10-1000 nm.

EFFECT: obtaining improved characteristics for qualitative analysis of the glass transition temperature.

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