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Entropy favours open colloidal lattices

Journal Article · · Nature Materials
DOI:https://doi.org/10.1038/nmat3496· OSTI ID:1875149
 [1];  [2];  [2]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States); Univ. of Michigan, Ann Arbor, MI (United States); University of Illinois
  2. Univ. of Illinois, Urbana, IL (United States)
Burgeoning experimental and simulation activity seeks to understand the existence of self-assembled colloidal structures that are not close-packed. Here we describe an analytical theory based on lattice dynamics and supported by experiments that reveals the fundamental role entropy can play in stabilizing open lattices. The entropy we consider is associated with the rotational and vibrational modes unique to colloids interacting through extended attractive patches. Here, the theory makes predictions of the implied temperature, pressure and patch-size dependence of the phase diagram of open and close-packed structures. More generally, it provides guidance for the conditions at which targeted patchy colloidal assemblies in two and three dimensions are stable, thus overcoming the difficulty in exploring by experiment or simulation the full range of conceivable parameters.
Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
FG02-07ER46471
OSTI ID:
1875149
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 3 Vol. 12; ISSN 1476-1122
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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Active generation and magnetic actuation of microrobotic swarms in bio-fluids journal December 2019
Nonisotropic Self-Assembly of Nanoparticles: From Compact Packing to Functional Aggregates journal May 2018
Janus Graphene: Scalable Self‐Assembly and Solution‐Phase Orthogonal Functionalization journal April 2019
Assembly and phase transitions of colloidal crystals journal January 2016
Actuation of shape-memory colloidal fibres of Janus ellipsoids journal November 2014
Liquids more stable than crystals in particles with limited valence and flexible bonds journal August 2013
Crystal engineering with DNA journal February 2019
Designing patchy particles for optimum interfacial activity journal January 2014
Design of a Kagome lattice from soft anisotropic particles journal January 2015
A versatile model for soft patchy particles with various patch arrangements journal January 2016
Self-assembly of three-dimensional ensembles of magnetic particles with laterally shifted dipoles journal January 2016
Complex patchy colloids shaped from deformable seed particles through capillary interactions journal January 2018
General patchy ellipsoidal particle model for the aggregation behaviors of shape- and/or surface-anisotropic building blocks journal January 2018
Equilibrium crystal phases of triblock Janus colloids journal September 2016
Crystal growth kinetics of triblock Janus colloids journal March 2018
Directed assembly of photonic crystals through simple substrate patterning journal January 2019
Controlled armoring of metal surfaces with metallodielectric patchy particles journal May 2019
Assembly of clathrates from tetrahedral patchy colloids with narrow patches journal September 2019
Recent progress on patchy colloids and their self-assembly journal April 2013
Biological growth and synthetic fabrication of structurally colored materials journal June 2019
Design of DNA Origami Diamond Photonic Crystals journal January 2019
Crystal structures in binary hard-sphere colloid-droplet mixtures with patchy cross interactions journal January 2020
Exploring the Complex World of Two-Dimensional Ordering with Three Modes journal July 2013
Novel Pyrochlorelike Crystal with a Photonic Band Gap Self-Assembled Using Colloids with a Simple Interaction Potential journal October 2017
Colloidal matter: Packing, geometry, and entropy journal August 2015
Pattern generation and motion control of a vortex-like paramagnetic nanoparticle swarm journal July 2018
Phase Separation and Self-Assembly in a Fluid of Mickey Mouse Particles text January 2015
Transformable topological mechanical metamaterials text January 2015
Free energy of singular sticky-sphere clusters text January 2016
Connectivity, Dynamics, and Structure in a Tetrahedral Network Liquid preprint January 2016
Entropy favors heterogeneous structures of networks near the rigidity threshold text January 2017
Self-assembled multi-layer simple cubic photonic crystals of oppositely charged colloids in confinement text January 2019

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