Effects of the Attractive Potential Range on the Phase Behavior of Small Clusters of Colloidal Particles

2014 ◽  
Vol 59 (10) ◽  
pp. 3105-3112
Author(s):  
Ray M. Sehgal ◽  
Dimitrios Maroudas ◽  
David M. Ford
Keyword(s):  
Phase Behavior ◽  
Colloidal Particles ◽  
Attractive Potential ◽  
Potential Range ◽  
Small Clusters

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.

The effect of surface roughness on the phase behavior of colloidal particles

2020 ◽  
Vol 152 (4) ◽  
pp. 044902
Author(s):  
Md Moinuddin ◽  
Prithwish Biswas ◽  
Mukta Tripathy
Keyword(s):  
Surface Roughness ◽  
Phase Behavior ◽  
Colloidal Particles ◽  
Effect Of Surface

scholarly journals Kinetic control of the coverage of oil droplets by DNA-functionalized colloids

2016 ◽  
Vol 2 (8) ◽  
pp. e1600881 ◽  
Author(s):  
Darshana Joshi ◽  
Dylan Bargteil ◽  
Alessio Caciagli ◽  
Jerome Burelbach ◽  
Zhongyang Xing ◽  
...  
Keyword(s):  
Simple Model ◽  
Phase Behavior ◽  
Colloidal Particles ◽  
Surface Coverage ◽  
Kinetic Control ◽  
Two Dimensional ◽  
Oil Droplets ◽  
Reversible Adsorption ◽  
Depletion Interactions

We report a study of reversible adsorption of DNA-coated colloids on complementary functionalized oil droplets. We show that it is possible to control the surface coverage of oil droplets using colloidal particles by exploiting the fact that, during slow adsorption, compositional arrest takes place well before structural arrest occurs. As a consequence, we can prepare colloid-coated oil droplets with a “frozen” degree of loading but with fully ergodic colloidal dynamics on the droplets. We illustrate the equilibrium nature of the adsorbed colloidal phase by exploring the quasi–two-dimensional phase behavior of the adsorbed colloids under the influence of depletion interactions and present simulations of a simple model that illustrates the nature of the compositional arrest and the structural ergodicity.

Re-entrant Phase Behavior in Confined Two-Patch Colloidal Particles

2014 ◽  
Vol 118 (30) ◽  
pp. 9076-9084 ◽  
Author(s):  
S. Sokołowski ◽  
Y. V. Kalyuzhnyi
Keyword(s):  
Phase Behavior ◽  
Colloidal Particles

Phase Behavior of Small Attractive Colloidal Particles

1996 ◽  
Vol 76 (1) ◽  
pp. 150-153 ◽  
Author(s):  
D. Rosenbaum ◽  
P. C. Zamora ◽  
C. F. Zukoski
Keyword(s):  
Phase Behavior ◽  
Colloidal Particles

scholarly journals A Journey Through the Landscapes of Small Particles in Binary Colloidal Assemblies: Unveiling Structural Transitions from Isolated Particles to Clusters upon Variation in Composition

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 921 ◽  
Author(s):  
Lotito ◽  
Zambelli
Keyword(s):  
Colloidal Particles ◽  
Ad Hoc ◽  
Colloidal Suspension ◽  
Threshold Value ◽  
Close Packing ◽  
Structural Transitions ◽  
Small Particles ◽  
Shape Identification ◽  
Spatial Configurations ◽  
Small Clusters

Two-dimensional (2D) amorphous binary colloidal assemblies composed of particles of two different sizes are characterized by the loss of hexagonal close-packing for larger particles, occurring when the size ratio between small (S) and large (L) particles dSdL exceeds a certain threshold value. For moderately low particle number ratios NSNL large particles still retain a denser arrangement with transitions from hexagonal symmetry to the coexistence of different types of symmetries as NSNL progressively departs from 0 to higher values. On the other hand, small particles reveal sparser arrangements: shape identification and quantification of structural transitions in small particle arrangements appear particularly challenging. In this article, we investigate their shapes and transitions for amorphous binary colloidal particles assembled at the air/water interface. For the quantitative characterization of the evolution in particle arrangements for NSNL variable between 0.5 and 2, we develop an innovative procedure for morphological analysis, combining Minkowski functionals, Voronoi diagrams and ad hoc techniques to recognize and classify specific features. Such a powerful approach has revealed a wide variety of landscapes featuring isolated particles, dimers, chains, small clusters evolving with the colloidal suspension composition. Our method can be applied to the analysis of spatial configurations of sparse colloidal patterns obtained in different conditions.

scholarly journals Study on Colloidal Model of Petroleum Residues through the Attraction Potential between Colloids

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Long-li Zhang ◽  
Guo-hua Yang ◽  
Chao-he Yang ◽  
Guo-he Que
Keyword(s):  
Dielectric Permittivity ◽  
Potential Energy ◽  
Colloidal Particles ◽  
Fractional Composition ◽  
Van Der Waals ◽  
Thermal Reaction ◽  
Attractive Potential ◽  
Van Der Waals Attraction ◽  
Atmospheric Residue ◽  
Hamaker Constants

The samples of DaGang atmospheric residue (DG-AR), Middle East atmospheric residue (ME-AR), TaHe atmospheric residue (TH-AR), and their thermal reaction samples were chosen for study. All the samples were fractioned into six components separately, including saturates plus light aromatics, heavy aromatics, light resins, middle resins, heavy resins, and asphaltenes. The dielectric permittivity of the solutions of these components was measured, and the dielectric permittivity values of the components can be determined by extrapolation, which increased steadily from saturates plus light aromatics to asphaltenes. Moreover, the Hamaker constants of the components were calculated from their dielectric permittivity values. The Van der Waals attractive potential energy between colloids corresponding to various models could be calculated from the fractional composition and the Hamaker constants of every component. It was assumed that the cores of colloidal particles were formed by asphaltenes and heavy resins mainly; the other fractions acted as dispersion medium. For the three serials of thermal reaction samples, the Van der Waals attraction potential energy between colloids for this kind of model was calculated. For TH-AR thermal reaction samples, the Van der Waals attraction potential energy presented the maximum as thermal reaction is going on, which was near to the end of coke induction period.

Phase diagram of inverse patchy colloids assembling into an equilibrium laminar phase

Soft Matter ◽  
2014 ◽  
Vol 10 (42) ◽  
pp. 8464-8474 ◽  
Author(s):  
Eva G. Noya ◽  
Ismene Kolovos ◽  
Günther Doppelbauer ◽  
Gerhard Kahl ◽  
Emanuela Bianchi
Keyword(s):  
Phase Diagram ◽  
Phase Behavior ◽  
Colloidal Particles ◽  
Equatorial Belt ◽  
Patchy Colloids ◽  
Oppositely Charged

We numerically study the phase behavior of colloidal particles with two charged patches at the poles and an oppositely charged equatorial belt.

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
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