Next Article in Journal
Effects of Nano-Aluminum Nitride on the Performance of an Ultrahigh-Temperature Inorganic Phosphate Adhesive Cured at Room Temperature
Next Article in Special Issue
Low-Temperature Crystal Structures of the Hard Core Square Shoulder Model
Previous Article in Journal
Fabrication of a Nano-ZnO/Polyethylene/Wood-Fiber Composite with Enhanced Microwave Absorption and Photocatalytic Activity via a Facile Hot-Press Method
Previous Article in Special Issue
Assembly of 1D Granular Structures from Sulfonated Polystyrene Microparticles
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessCommunication
Materials 2017, 10(11), 1265; https://doi.org/10.3390/ma10111265

Tuning Patchy Bonds Induced by Critical Casimir Forces

1
Institute of Physics, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
2
Faculty of Electrical Engineering, Electronics-Telecommunications, Cantho University of Technology, Cantho 901184, Vietnam
3
Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
4
Huygens-Kamerlingh Onnes Laboratory, Leiden University, 2333 CA Leiden, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 22 September 2017 / Revised: 30 October 2017 / Accepted: 31 October 2017 / Published: 3 November 2017
(This article belongs to the Special Issue Designed Colloidal Self-Assembly)
View Full-Text   |   Download PDF [1922 KB, uploaded 3 November 2017]   |  

Abstract

Experimental control of patchy interactions promises new routes for the assembly of complex colloidal structures, but remains challenging. Here, we investigate the role of patch width in the assembly of patchy colloidal particles assembled by critical Casimir forces. The particles are composed of a hydrophobic dumbbell with an equatorial hydrophilic polymer shell, and are synthesized to have well-defined patch-to-shell area ratios. Patch-to-patch binding is achieved in near-critical binary solvents, in which the particle interaction strength and range are controlled by the temperature-dependent solvent correlation length. Upon decreasing the patch-to-shell area ratio, we observe a pronounced change of the bonding morphology towards directed single-bonded configurations, as clearly reflected in the formation of chain-like structures. Computer simulations using an effective critical Casimir pair potential for the patches show that the morphology change results from the geometric exclusion of the increasingly thick hydrophilic particle shells. These results highlight the experimental control of patchy interactions through the engineering of the building blocks on the way towards rationally designed colloidal superstructures. View Full-Text
Keywords: colloidal assembly; patchy colloid; critical Casimir effect colloidal assembly; patchy colloid; critical Casimir effect
Figures

Figure 1a

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Nguyen, T.A.; Newton, A.; Kraft, D.J.; Bolhuis, P.G.; Schall, P. Tuning Patchy Bonds Induced by Critical Casimir Forces. Materials 2017, 10, 1265.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top