Optically initiated nanoparticle thermodiffusion structures amd their convectional stability

Plentiful information about colloid transfer phenomena can be gained using optically initiated nanoparticle structure dynamics research. Two coherent laser beam interference and optical beam energy absorbtion creates spatial periodical nature temperature changes within the liquid layer. However in result of nanoparticle (termoforētiskās)? seperation, nanoparticle structure distribution corresponding to temperature non homogeneity    1st image. Holographic machinery for nanoparticle optically formed structure dynamics research in ferrocolloids

 

Liquid temperatures and concentration structures have very diverse relaxation parameters. Measuring diffraction signals of concentration structure in its relaxation state, it is possible to determine colloidal particle diffusion and thermo diffusion coefficients. Spectral analysis of diffraction signals, allows to also determine nanoparticle physical size distribution. Holographic machinery was developed with whom optically initiated concentration changes in time were visualized. These changes in addition with diffraction dynamics measurements provides information of nanoparticle structure development and their heat convected stability. With optical methods, research of colloidal nanoparticle concentration boundary layers are made in isothermal liquid in non homogeneous magnetic field and magnetic Soret effect research optically initiated particle concentration structures. Colloidal nanoparticle mass diffusion and (termoforētiskās)? transfers anisotropy in magnetic fields was determined. External magnetic fields influenced, specific periodic double diffusion convection structures were created in the layer. Laboratory perfors fundamental and applied research of these structures. 2nd image. Convection vortexes in optically initiated nanoparticle structures created in magnetic field