Dresden 2017 – wissenschaftliches Programm
CPP 10.6: Vortrag
Montag, 20. März 2017, 16:15–16:30, ZEU 114
Colloid Clusters in Confinement: Observation, Modelling and Simulation — •Junwei Wang1,2, Michael Engel2, and Nicolas Vogel1 — 1Institute of Particle Technology, Friedrich Alexander Universität, Erlangen, Germany — 2Institute of Multiscale Simulation, Friedrich Alexander Universität, Erlangen, Germany
Natural materials evolve to maximize performance from a limited choice of simple building blocks. Structural coloration is one example where nature utilizes ordered nanostructures to create vivid color. Colloidal particles are ideal building blocks to mimic this design principle, as their sizes match with wavelength of visible light. Colloids assemble upon increase of volume fraction into crystals, driven by entropy. Recent studies show that for colloids in spherical confinement, entropy favors icosahedral symmetry. Here we experimentally realize and geometrically model highly ordered icosahedral colloid assemblies. We discuss and compare stabilization mechanisms. Our study demonstrates the ability to create sophisticated colloid assemblies via confinement, which may find use as templates, photonic materials, and building blocks for hierarchical assembly.