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Updated: Apr 25, 2026

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Published on: February 4, 2013

Self-assembly of three-dimensional open structures using patchy colloidal particles.

D Zeb Rocklin¹, Xiaoming Mao

¹Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI 48109, USA. drocklin@umich.edu.

|August 14, 2014

Summary

This summary is machine-generated.

Researchers developed triblock Janus particles for self-assembling stable 3D open structures at the colloidal scale. These structures exhibit unique properties and have potential engineering applications.

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Area of Science:

Materials Science
Colloid Science
Statistical Mechanics

Background:

Open structures exhibit unique properties like negative Poisson's ratio and negative thermal expansion, with significant engineering applications.
Self-assembling stable open structures at the colloidal scale is challenging due to short-range interactions and low coordination numbers.

Purpose of the Study:

To investigate the self-assembly of three-dimensional open structures using triblock Janus particles.
To explore the stabilization mechanisms and resulting structural motifs of these colloidal assemblies.
To analyze the phase diagrams and mechanical properties of the self-assembled structures.

Main Methods:

Utilized triblock Janus particles with specific attractive patches and repulsive cores for directed self-assembly.
Employed analytic theory to examine phase diagrams and characterize mechanical properties.
Investigated order-by-disorder and vibrational entropy effects in structure stabilization.

Main Results:

Triblock Janus particles self-assemble into stable 3D open structures, including pyrochlore, hexagonal tetrastack, and perovskite lattices.
Structures are stabilized by orientational entropy (order-by-disorder) and selected over close-packed structures by vibrational entropy.
Different particle patch sizes lead to tetrahedral or octahedral structural motifs.

Conclusions:

Triblock Janus particles provide a rational design strategy for self-assembling stable 3D colloidal open structures.
The findings offer insights into controlling colloidal self-assembly for materials with unusual properties.
This approach is compatible with current experimental techniques for colloidal assembly.