scholarly journals Numerical study of the phase behavior of rod-like colloidal particles with attractive tips

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025030
Author(s):  
Justin T. Jack ◽  
Paul C. Millett
Keyword(s):  
Phase Behavior ◽  
Colloidal Particles ◽  
Numerical Study

Numerical Study on Electrokinetic Interaction Between a Pair of Cylindrical Colloidal Particles

2009 ◽  
Author(s):  
Dolfred Vijay Fernandes ◽  
Sangmo Kang ◽  
Yong Kweon Suh
Keyword(s):  
Flow Field ◽  
Electric Field ◽  
Colloidal Particles ◽  
Stokes Equations ◽  
Separation Efficiency ◽  
Numerical Study ◽  
Interaction Force ◽  
Surface Element ◽  
Immersed Boundary ◽  
Interaction Forces

Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of an electric field. Presently this phenomenon of electrokinetics is widely used in biotechnology for the separation of proteins, sequencing of polypeptide chains etc. The separation efficiency of these biomolecules is affected by their aggregation. Thus it is important to study the interaction forces between the molecules. In this study we calculate the electrophoretic motion of a pair of colloidal particles under axial electric field. The hydrodynamic and electric double layer (EDL) interaction forces are calculated numerically. The EDL interaction force is calculated from electric field distribution around the particle using Maxwell stress tensor and the hydrodynamic force is calculated from the flow field obtained from the solution of Stokes equations. The continuous forcing approach of immersed boundary method is used to obtain flow field around the moving particles. The EDL distribution around the particles is obtained by solving Poisson-Nernst-Planck (PNP) equations on a hybrid grid system. The EDL interaction force calculated from numerical solution is compared with the one obtained from surface element integration (SEI) method.

Colloids in the study of fundamental physics

2018 ◽  
Vol 32 (18) ◽  
pp. 1840008
Author(s):  
Tian Hui Zhang ◽  
Bing Yue Zhang ◽  
Jing Sheng Cao ◽  
Ying Liang ◽  
Xiang Yang Liu
Keyword(s):  
Glass Transition ◽  
Phase Behavior ◽  
Colloidal Particles ◽  
Fundamental Physics ◽  
Modeling Systems ◽  
Physical Phenomena ◽  
Fundamental Physical

Colloidal particles in solution exhibit phase behavior analogous to atoms. In the last decades, colloids have been widely employed as modeling systems in studying nucleation, crystallization, glass transition and melting. A number of advances have been achieved. These advances have greatly extended the understanding of fundamental physical phenomena. In this paper, we give a brief summary on these advances.

scholarly journals Shaping colloidal bananas to reveal biaxial, splay-bend nematic, and smectic phases

Science ◽  
2020 ◽  
Vol 369 (6506) ◽  
pp. 950-955
Author(s):  
Carla Fernández-Rico ◽  
Massimiliano Chiappini ◽  
Taiki Yanagishima ◽  
Heidi de Sousa ◽  
Dirk G. A. L. Aarts ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Functional Materials ◽  
Building Blocks ◽  
Develop Model ◽  
Smectic Phases ◽  
Particle Level ◽  
Nematic Phases ◽  
The Impact

Understanding the impact of curvature on the self-assembly of elongated microscopic building blocks, such as molecules and proteins, is key to engineering functional materials with predesigned structure. We develop model “banana-shaped” colloidal particles with tunable dimensions and curvature, whose structure and dynamics are accessible at the particle level. By heating initially straight rods made of SU-8 photoresist, we induce a controllable shape deformation that causes the rods to buckle into banana-shaped particles. We elucidate the phase behavior of differently curved colloidal bananas using confocal microscopy. Although highly curved bananas only form isotropic phases, less curved bananas exhibit very rich phase behavior, including biaxial nematic phases, polar and antipolar smectic-like phases, and even the long-predicted, elusive splay-bend nematic phase.

Early Dynamics and Stabilization Mechanisms of Oil-in-Water Emulsions Containing Colloidal Particles Modified with Short Amphiphiles: A Numerical Study

Langmuir ◽  
2017 ◽  
Vol 33 (50) ◽  
pp. 14347-14357 ◽  
Author(s):  
Manuella Cerbelaud ◽  
Arnaud Videcoq ◽  
Lauriane Alison ◽  
Elena Tervoort ◽  
André R. Studart
Keyword(s):  
Colloidal Particles ◽  
Numerical Study ◽  
Oil In Water

Numerical study of light-induced phase behavior of smectic solids

2016 ◽  
Vol 94 (4) ◽  
Author(s):  
Hayoung Chung ◽  
Jaesung Park ◽  
Maenghyo Cho
Keyword(s):  
Phase Behavior ◽  
Numerical Study

scholarly journals Lipid membrane-mediated attraction between curvature inducing objects

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Casper van der Wel ◽  
Afshin Vahid ◽  
Anđela Šarić ◽  
Timon Idema ◽  
Doris Heinrich ◽  
...  
Keyword(s):  
Colloidal Particles ◽  
Lipid Membrane ◽  
Numerical Study ◽  
Particle Diameter ◽  
Interaction Force ◽  
Membrane Curvature ◽  
Coarse Grained ◽  
Cellular Transport ◽  
Curvature Energy ◽  
Membrane Deformations

Abstract The interplay of membrane proteins is vital for many biological processes, such as cellular transport, cell division, and signal transduction between nerve cells. Theoretical considerations have led to the idea that the membrane itself mediates protein self-organization in these processes through minimization of membrane curvature energy. Here, we present a combined experimental and numerical study in which we quantify these interactions directly for the first time. In our experimental model system we control the deformation of a lipid membrane by adhering colloidal particles. Using confocal microscopy, we establish that these membrane deformations cause an attractive interaction force leading to reversible binding. The attraction extends over 2.5 times the particle diameter and has a strength of three times the thermal energy (−3.3 kBT). Coarse-grained Monte-Carlo simulations of the system are in excellent agreement with the experimental results and prove that the measured interaction is independent of length scale. Our combined experimental and numerical results reveal membrane curvature as a common physical origin for interactions between any membrane-deforming objects, from nanometre-sized proteins to micrometre-sized particles.

scholarly journals A numerical study of one-patch colloidal particles: from square-well to Janus

2010 ◽  
Vol 12 (38) ◽  
pp. 11869 ◽  
Author(s):  
Francesco Sciortino ◽  
Achille Giacometti ◽  
Giorgio Pastore
Keyword(s):  
Colloidal Particles ◽  
Numerical Study ◽  
Square Well
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