Diffusion of single active-dipolar cubes in applied fields - Kölner UniversitätsPublikationsServer

Kaiser, Martin, Martinez, Yeimy, Schmidt, Annette M., Sanchez, Pedro A. ORCID: 0000-0003-0841-6820 and Kantorovich, Sofia S. (2020). Diffusion of single active-dipolar cubes in applied fields. J. Mol. Liq., 304. AMSTERDAM: ELSEVIER. ISSN 1873-3166

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DOI:10.1016/j.molliq.2020.112688

Abstract

Active matter refers to a class of out-of-equilibrium systems whose ability to transform environmental energy to kinetic energy is sought after in multiple fields of science and at very different length scales. At microscopic scales, an important challenge lies in overpowering the particles reorientation due to thermal fluctuations, especially in nano-sized systems, to create non-random, directed motion, needed for a wide range of possible applications. In this article, we employ molecular dynamics simulations to show that the diffusion of a self-propelling dipolar nanocube can be enhanced in a pre-defined direction with the help of a moderately strong applied magnetic field, overruling the effect of the thermal fluctuations. Furthermore, we show that the direction of diffusion is given by the orientation of the net internal magnetisation of the cube. This can be used to determine experimentally the latter in synthetically crafted active cobalt ferrite nanocubes. (C) 2020 Elsevier B.V. All rights reserved.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Kaiser, Martin	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Martinez, Yeimy	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Schmidt, Annette M.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Sanchez, Pedro A.	UNSPECIFIED	orcid.org/0000-0003-0841-6820	UNSPECIFIED
Kantorovich, Sofia S.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED