METHOD FOR ULTRALOCAL OPTICAL HEATING AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC G01K11/20 G01K7/32 G01K13/00 B82Y20/00 

FIELD: nanotechnology.

SUBSTANCE: invention relates to the field of nanotechnology, in particular to the field of ultra-local thermal action on the object under study, namely, controlled heating by a nanodiamond heater. The method for ultralocal optical heating is based on the action of laser radiation on nanoparticles fixed at the end of a glass capillary placed in the medium under study. The method differs in that a polycrystalline diamond particle containing amorphous carbon at intercrystallite boundaries is placed in a glass capillary, a two-stage calibration of the diamond particle is carried out, in which, at the first calibration stage, the diamond nanoparticle fixed in the glass capillary and placed in a thermostat is exposed to laser radiation, and measurements to construct a dependence curve of the spectral position of the maximum of the zero-phonon luminescence line of impurity centers formed in a diamond particle on a given temperature, and at the second stage of calibration, a glass capillary with a diamond particle is placed in the medium under study, measurements are taken to plot a dependence curve of the heating temperature of a diamond particle on power laser radiation, and after calibration, a glass capillary with a diamond particle is placed at a given point in the medium under study and the diamond particle is exposed to laser radiation with a power corresponding to a given temperature of ultralocal heating, taking into account the calibration data. The device for ultralocal optical heating for implementing the method contains a nanoparticle placed in a glass capillary installed in a micromanipulator capable of reciprocating the glass capillary, a laser radiation source and a luminescence registration unit, while at the end of the glass capillary there is a polycrystalline diamond particle containing amorphous carbon at the intercrystallite boundaries, which is optically connected to the laser radiation source and the luminescence registration unit, while the diamond particle contains at least one luminescent impurity center, and the glass capillary is placed in the medium under study.

EFFECT: inventive method for local optical heating can be widely used as a precision device that allows for controlled and accurate guidance of temperature gradients in biological research.

14 cl, 5 dwg