Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Separation of particles in polydisperse nanosuspension in the laser radiation field

V.I. Ivanov, S.A. Pyachin

Far Eastern State Transport University

DOI: 10.26456/pcascnn/2021.13.146

Original article

Abstract: On the basis of a stationary solution of a diffusion equation separation of nanoparticles in a transparent polydisperse aqueous suspension with different types of size distributions was studied under the action of the light pressure arising in the laser radiation field with the intensity of0,5—500 W/cm2. It  was found that particles with a radius of more than 100 nm will mainly be precipitated at the bottom of the cell, and the concentration of smaller nanoparticles in the entire volume of the suspension will remain unchanged. In the case of a symmetrical initial distribution of nanoparticles size, the effect of a light beam with high intensity on the suspension leads to a violation of the symmetry of the distribution function curve, as well as a shift of the maximum to the region of smaller particle sizes on the irradiated surface. If the initial size distribution is asymmetric, the initial single-mode particle size distribution is transformed into a two-mode one. This technique can be used to isolate nanoparticles of certain sizes depending on the power density of the radiation.

Keywords: laser radiation, polydisperse medium, nanoparticles, deposition, separation

  • Valery I. Ivanov – Dr. Sc., Professor, Head of the Physics and Theoretical Mechanics Department, Far Eastern State Transport University
  • Sergey A. Pyachin – Dr. Sc., Docent, Professor, Physics and Theoretical Mechanics Department, Far Eastern State Transport University

Reference:

Ivanov, V.I. Separation of particles in polydisperse nanosuspension in the laser radiation field / V.I. Ivanov, S.A. Pyachin // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. – Tver: TSU, 2021. — I. 13. — P. 146-155. DOI: 10.26456/pcascnn/2021.13.146. (In Russian).

Full article (in Russian): download PDF file

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