METHOD FOR PRODUCTION OF NANOSIZE PARTICLES, NANOSTRUCTURING, STRENGTHENING OF SURFACE AND DEVICE FOR ITS REALISATION Russian patent published in 2011 - IPC B82B3/00 C23C4/00 

FIELD: nanotechnologies.

SUBSTANCE: method consists in laser ablation of substance into condensed medium by radiation of processed substance through a layer of dielectric. In process of method realisation, radiation zone thermodynamic parametres are monitored, and ablation is controlled from surface of radiated substance by means of control of pressure release from high-energy to metastable state. Pressure release is carried out by selection of dielectric layer thickness and its physical properties so that the acoustic wave reflected from the outer surface of dielectric could unload the high-energy state. At the same time near-surface layer of heated material gets in the area of substance metastable condition, when processed substance vapours are taken out into dielectric layer, and a solution of nanoparticles is produced in it. Device for method realisation comprises a laser, a homogeniser and an evaporating chamber with target from processed substance. A filter of second harmonic and a photodetector are installed on the way of laser radiation reflected from the target. A lens and an optical fibre connected to the second photodetector are installed on the way of thermal radiation along the normal line to the target; both photodetectors and a piezoelectric cell are connected to multi-channel high-speed memorising recorder. A semi-transparent mirror is installed at the angle to a laser beam, in reflected radiation of which there is a synchronisation photodetector installed and connected to the synchronising inlet of the recorder.

EFFECT: invention provides for the possibility to implement a wide spectrum of methods for production of nanosize objects, nanostructuring and surface strengthening with high efficiency factor from various materials.

3 cl, 2 dwg