Equilibrium Orientation and Adsorption of an Ellipsoidal Janus Particle at a Fluid–Fluid Interface

Florian Günther; Qingguang Xie; Jens Harting

doi:10.3390/colloids4040055

Equilibrium Orientation and Adsorption of an Ellipsoidal Janus Particle at a Fluid–Fluid Interface

Florian Günther, Qingguang Xie, Jens Harting (Corresponding author)

Fluids and Flows

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

We investigate the equilibrium orientation and adsorption process of a single, ellipsoidal Janus particle at a fluid–fluid interface. The particle surface comprises equally sized parts that are hydrophobic or hydrophilic. We present free energy models to predict the equilibrium orientation and compare the theoretical predictions with lattice Boltzmann simulations. We find that the deformation of the fluid interface strongly influences the equilibrium orientation of the Janus ellipsoid. The adsorption process of the Janus ellipsoid can lead to different final orientations determined by the interplay of particle aspect ratio and particle wettablity contrast.
Keywords: Janus particles; colloids at interfaces; lattice Boltzmann simulations

Original language	English
Article number	55
Number of pages	15
Journal	Colloids and Interfaces
Volume	4
Issue number	4
DOIs	https://doi.org/10.3390/colloids4040055
Publication status	Published - Dec 2020

Keywords

Janus particles
colloids at interfaces
lattice Boltzmann simulations

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title = "Equilibrium Orientation and Adsorption of an Ellipsoidal Janus Particle at a Fluid–Fluid Interface",

abstract = "We investigate the equilibrium orientation and adsorption process of a single, ellipsoidal Janus particle at a fluid–fluid interface. The particle surface comprises equally sized parts that are hydrophobic or hydrophilic. We present free energy models to predict the equilibrium orientation and compare the theoretical predictions with lattice Boltzmann simulations. We find that the deformation of the fluid interface strongly influences the equilibrium orientation of the Janus ellipsoid. The adsorption process of the Janus ellipsoid can lead to different final orientations determined by the interplay of particle aspect ratio and particle wettablity contrast.Keywords: Janus particles; colloids at interfaces; lattice Boltzmann simulations",

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T1 - Equilibrium Orientation and Adsorption of an Ellipsoidal Janus Particle at a Fluid–Fluid Interface

AU - Günther, Florian

AU - Xie, Qingguang

AU - Harting, Jens

PY - 2020/12

Y1 - 2020/12

N2 - We investigate the equilibrium orientation and adsorption process of a single, ellipsoidal Janus particle at a fluid–fluid interface. The particle surface comprises equally sized parts that are hydrophobic or hydrophilic. We present free energy models to predict the equilibrium orientation and compare the theoretical predictions with lattice Boltzmann simulations. We find that the deformation of the fluid interface strongly influences the equilibrium orientation of the Janus ellipsoid. The adsorption process of the Janus ellipsoid can lead to different final orientations determined by the interplay of particle aspect ratio and particle wettablity contrast.Keywords: Janus particles; colloids at interfaces; lattice Boltzmann simulations

AB - We investigate the equilibrium orientation and adsorption process of a single, ellipsoidal Janus particle at a fluid–fluid interface. The particle surface comprises equally sized parts that are hydrophobic or hydrophilic. We present free energy models to predict the equilibrium orientation and compare the theoretical predictions with lattice Boltzmann simulations. We find that the deformation of the fluid interface strongly influences the equilibrium orientation of the Janus ellipsoid. The adsorption process of the Janus ellipsoid can lead to different final orientations determined by the interplay of particle aspect ratio and particle wettablity contrast.Keywords: Janus particles; colloids at interfaces; lattice Boltzmann simulations

KW - Janus particles

KW - colloids at interfaces

KW - lattice Boltzmann simulations

U2 - 10.3390/colloids4040055

DO - 10.3390/colloids4040055

M3 - Article

VL - 4

JO - Colloids and Interfaces

JF - Colloids and Interfaces

SN - 2504-5377

IS - 4

M1 - 55

ER -