Tolerance in superstructures formed from high-quality colloidal ZnO nanoparticles with hexagonal cross-section

Sebastian Theiss, Michael Vogel, Moritz Schlötter, Sebastian Sutter, Martin Thomas Stöckl and Sebastian Polarz Cryst Eng Com. DOI: 10.1039/C9CE00811J


In particle-based materials one hopes for cooperative effects, if nanoparticles form periodic arrays. Because for particle shapes deviating from spherical, it is difficult to obtain monodisperse samples, we investigated the influence of polydispersity in 2D colloidal crystallization. We work with hexagonal ZnO nanoplates with sizes below 50nm, and the directionality of inter-particle interaction was tuned by choice of the capping agents. Surprisingly, there was no glass to crystal transition for a critical value of polydispersity, but a continuous transition.