Electro-orientation of Ag nanowires in viscoelastic fluids

Martín-Martín, Sergio; Delgado, Ángel Acuña; Arenas-Guerrero, Paloma; Jiménez, María Luisa Gómez

doi:10.1016/j.jcis.2022.04.164

Cited by 1 publication

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“…These results are in line with those reported in ref ( 62 ). In ref ( 63 ) it was shown that viscoelasticity has some effect on the rotational diffusion of nanoparticles. It was reported the existence of a yield electric field below which there is no electro-orientation; in addition, such field increases with the elastic modulus of the host solution.…”

Section: Resultsmentioning

confidence: 99%

Electro-optical Study of the Anomalous Rotational Diffusion in Polymer Solutions

et al. 2023

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Brownian diffusion of spherical nanoparticles is usually exploited to ascertain the rheological properties of complex media. However, the behavior of the tracer particles is affected by a number of phenomena linked to the interplay between the dynamics of the particles and polymer coils. For this reason, the characteristic lengths of the dispersed entities, depletion phenomena, and the presence of sticking conditions have been observed to affect the translational diffusion of the probes. On the other hand, the retardation effect of the host fluid on the rotational diffusion of nonspherical particles is less understood. We explore the possibility of studying this phenomenon by analyzing the electro-orientation of the particles in different scenarios in which we vary the ratio between the particle and polymer characteristic size, and the geometry of the particles, including both elongated and oblate shapes. We find that the Stokes–Einstein relation only applies if the radius of gyration of the polymer is much shorter than the particle size and when some repulsive interaction between both is present.

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Section: Resultsmentioning

confidence: 99%