Phase separation and self-assembly of colloidal dimers with tunable attractive strength: from symmetrical square-wells to Janus dumbbells

Soft Matter ◽  
2014 ◽  
Vol 10 (29) ◽  
pp. 5269-5279 ◽  
Author(s):  
Gianmarco Munaò ◽  
Patrick O’Toole ◽  
Toby S. Hudson ◽  
Dino Costa ◽  
Carlo Caccamo ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Phase Separation ◽  
Self Assembly ◽  
Fluid Phase ◽  
Square Well

Progressive modification of the fluid phase diagram of colloidal dimers, from symmetrical square-well to Janus dumbbells.

scholarly journals Surface, Interface, and Temperature Effects on the Phase Separation and Nanoparticle Self Assembly of Bi-Metallic Ni0.5Ag0.5: A Molecular Dynamics Study

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 1040 ◽  
Author(s):  
Ryan H. Allaire ◽  
Abhijeet Dhakane ◽  
Reece Emery ◽  
P. Ganesh ◽  
Philip D. Rack ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Phase Diagram ◽  
Phase Separation ◽  
Self Assembly ◽  
Md Simulations ◽  
Bulk Sample ◽  
Immiscible Liquid ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Bimetallic Nanoparticle

Classical molecular dynamics (MD) simulations were used to investigate how free surfaces, as well as supporting substrates, affect phase separation in a NiAg alloy. Bulk samples, droplets, and droplets deposited on a graphene substrate were investigated at temperatures that spanned regions of interest in the bulk NiAg phase diagram, i.e., miscible and immiscible liquid, liquid-crystal, and crystal-crystal regions. Using MD simulations to cool down a bulk sample from 3000 K to 800 K, it was found that phase separation below 2400 K takes place in agreement with the phase diagram. When free surface effects were introduced, phase separation was accompanied by a core-shell transformation: spherical droplets created from the bulk samples became core-shell nanoparticles with a shell made mostly of Ag atoms and a core made of Ni atoms. When such droplets were deposited on a graphene substrate, the phase separation was accompanied by Ni layering at the graphene interface and Ag at the vacuum interface. Thus, it should be possible to create NiAg core-shell and layer-like nanostructures by quenching liquid NiAg samples on tailored substrates. Furthermore, interesting bimetallic nanoparticle morphologies might be tuned via control of the surface and interface energies and chemical instabilities of the system.

scholarly journals Phase Diagram of Active Brownian Spheres: Crystallization and the Metastability of Motility-Induced Phase Separation

2021 ◽  
Vol 126 (18) ◽  
Author(s):  
Ahmad K. Omar ◽  
Katherine Klymko ◽  
Trevor GrandPre ◽  
Phillip L. Geissler
Keyword(s):  
Phase Diagram ◽  
Phase Separation

A Self-Assembly Phase Diagram from Amphiphilic Perylene Diimides

2012 ◽  
Vol 18 (39) ◽  
pp. 12305-12313 ◽  
Author(s):  
Zhigang Zhang ◽  
Chuanlang Zhan ◽  
Xin Zhang ◽  
Shanlin Zhang ◽  
Jianhua Huang ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Self Assembly ◽  
Perylene Diimides

Microemulsions, modulated phases and macroscopic phase separation: a unified picture of rafts

2015 ◽  
Vol 57 ◽  
pp. 21-32 ◽  
Author(s):  
Ha Giang ◽  
Roie Shlomovitz ◽  
Michael Schick
Keyword(s):  
Phase Diagram ◽  
Phase Separation ◽  
Simple Model ◽  
Lipid Bilayer ◽  
Inhomogeneous Distribution ◽  
Modulated Phases ◽  
Distribution Of Components

We consider two mechanisms that can lead to an inhomogeneous distribution of components in a multicomponent lipid bilayer: macroscopic phase separation and the formation of modulated phases. A simple model that encompasses both mechanisms displays a phase diagram that also includes a structured fluid, a microemulsion. Identifying rafts with the inhomogeneities of this structured fluid, we see how rafts are related to the occurrence of macroscopic phase separation or the formation of modulated phases in other systems, and focus our attention on specific differences between them.

Dispersion, Phase Separation, and Self-Assembly of Polymer-Grafted Nanorod Composites

2017 ◽  
Vol 50 (21) ◽  
pp. 8816-8826 ◽  
Author(s):  
Vaishnavi Gollanapalli ◽  
Anirudh Manthri ◽  
Uma K. Sankar ◽  
Mukta Tripathy
Keyword(s):  
Phase Separation ◽  
Self Assembly ◽  
Dispersion Phase
Sign in / Sign up

Export Citation Format

Share Document