3D Binary Mesocrystals from Anisotropic Nanoparticles
Journal article, 2022

Binary mesocrystals offer the combination of nanocrystal properties in an ordered superstructure. Here, we demonstrate the simultaneous self-assembly of platinum and iron oxide nanocubes into micrometer-sized 3D mesocrystals using the gas-phase diffusion technique. By the addition of minor amounts of a secondary particle type tailored to nearly identical size, shape and surface chemistry, we were able to promote a random incorporation of foreign particles into a self-assembling host lattice. The random distribution of the binary particle types on the surface and within its bulk has been visualized using advanced transmission and scanning electron microscopy techniques. The 20-40 mu m sized binary mesocrystals have been further characterized through wide and small angle scattering techniques to reveal a long-range ordering on the atomic scale throughout the crystal while showing clear evidence that the material consists of individual building blocks. Through careful adjustments of the crystallization parameters, we could further obtain a reverse superstructure, where incorporated particles and host lattice switch roles.







Christian Jenewein

University of Konstanz

Jonathan Avaro

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Christian Appel

Paul Scherrer Institut

Marianne Liebi

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Chalmers, Physics, Materials Physics

Helmut Coelfen

University of Konstanz

Angewandte Chemie - International Edition

1433-7851 (ISSN) 1521-3773 (eISSN)

Vol. 61 2 e202112461

Subject Categories

Physical Chemistry

Materials Chemistry

Condensed Matter Physics





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4/5/2022 5