Nanoparticle synthesis and assembly
Perfecting particles individually and collectively
Multifunctional nanoparticles are synthesized via aerosol and solution-based methods, with tuning of e.g., semiconducting, magnetic and catalytic properties. Self-assembly into 1D, 2D, 3D and superlattice structures are explored for utilizing collective phenomena.
Aerosol-based methods, such as spark ablation, enables generation of nanoparticles with high-purity and controllable size, morphology, crystal structure and chemical composition on a large scale, at low costs, and in a safe and environmentally friendly way. Spark ablation furthermore has superior capabilities concerning mixing different materials into single nanoparticles. We mainly focus on the design of magnetic and catalytic nanoparticle-based materials to understand how nanoparticle properties can be tuned to improve the magnetic and catalytic performance of such materials.
We work on perfecting the synthesis of metal halide nanocrystals in perovskite and closely related structures. One focus is to produce wide-bandgap, lead-free, layered double perovskite nanocrystals for photocatalytic applications such as photoelectrochemical water splitting. Another focus is to produce self-assembled superstructures and use them as model systems in photophysics studies of collective light emission phenomena such as superfluorescence.
Recording of growth of gold-seeded indium arsenide nanowires in the Lund ETEM. At the beginning of the sequence we drop the temperature from 600ºC to 420ºC, so that growth initiates, and at the end of the sequence, we raise the temperature to 600ºC again, so that the nanowires start etching away again.