Influence of the Brownian movement on the motion of nanoand micro-particles in the inhomogeneous optical field

Abstract

The motion of light scattering particles of the Mie and Rayleigh micro- and nano-range type in the inhomogeneously-polarized optical field, with allowance made for the Brownian movement, is analysed in the paper. The spatial modulation of polarization in the observation plane determines the spatial modulation of the volume energy density. That is why the velocity and the resulting optical force, which cause the motion of the testing particles, change according to the degree of coherence of the interacting fields. The influence of the forces which arise in the viscous medium and cause the Brownian movement upon the mechanisms of manipulating and trapping testing particles by the optical field is studied.

A new method for estimating the degree of coherence of mutually orthogonal linearly polarized interacting waves

“…of SPIE Vol. 8882 88820I-4 In the first approximation we ignore the Brownian motion of particles 26 and believe that the particles were motionless before their bringing into the zone of the optical field affect. Let us consider the particle m with the mass M and the radius r, which is situated at the point of the field with coordinates …”

Use of motion peculiarities of test particles for estimating degree of coherence of optical fields

“…For receiving a more complete and vivid picture of the particle motion, it is also necessary to take into consideration a set of forces resulted from the liquid in which the particles are maintained in suspension. The behaviour of the test particles has been simulated without considering random Brownian forces which, as shown in the work [31], mask the information about the optical field and the corresponding coherence properties. The optical field, in which we observe the motion of particles of different natures, is a result of the two plane waves with different degrees of coherence interacting in the interference geometry suggested above.…”

Super flexible, highly conductive electrical compositor hybridized from polyvinyl alcohol and silver nano wires

“…37,38 In addition, PVA was connected onto the AgNWs surfaces by forming hydrogen bonds, 39,40 and those PVA and PVP on the surfaces of different AgNWs also formed hydrogen bonds and let the AgNWs undergo self-assemblies and align directionally. 37,41 Besides, the heat transferring and water evaporating during the solidication changed the micro and nano kinetics, let the PVA chains and water molecules move fast and frequently, as stated by Collision theory 42 or Brownian movement, 43 further increased the collides, contacts, and touches between/among the AgNWs. The solidied AgNWs/PVA oen showed shrinking volumes, that these shrinkages on the volumes increased the probability and opportunity of collides, contacts, and touches for AgNWs.…”

“…Secondly, Zeng AgNWs was peeled off the PET surface, a solid and smooth conductive surface was obtained by burying the AgNW lm at the surface of the PVA matrix. 43 While Romeo et al used an ice segregation induced self-assembly (ISISA) method to fabricate the electrically conductive macroporous scaffolds, that the liquid crystalline AgNWs were dispersed in PVA aqueous solutions, then the prepared PVA/AgNWs dispersions were poured into insulin syringes and dipped at a constant advancing ice front rate into a cold bath maintained at 77 K and under room pressure, the unidirectionally frozen samples were freeze dried for 48 h, the obtained monoliths kept both their size and shape, and the highly ordered macroporous PVA scaffolds containing self-organized AgNWs embedded in their walls were produced. 44 Apparently differing from them, we used a simple one-step blending method to fabricate the AgNWs/PVA electrical compositors, as shown in Fig.…”