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Stapel in der Nanowelt

Stacks in the Nanoworld

Synthesized nanoplatelets that have a tendency to arrange themselves in stacks. In the small figure such nanoplatelet stacks are shown from the side

Cooperation of LNQE groups from chemistry and physics published in the renowned journal Advanced Functional Materials

Nanomaterials are smallest objects in the size range from 1 nm to 100 nm. Due to their small size, they possess special chemical and physical properties that differ significantly from those of solids or larger objects of the same substance. A highly topical field of research in the field of nanomaterials is nanoplatelets. These have a strong tendency to self-arrange in ordered stacks. By arranging themselves in stacks with distances of a few nanometers, their physical properties change.

In a new publication in the renowned journal Advanced Functional Materials (impact factor 18.8), the chemistry group of Professor Nadja Bigall involved in the Laboratory of Nano- and Quantum Engineering, in collaboration with the physics group of Professor Herbert Pfnür, investigates the property changes of such nanoplatelet stacks.

In this work, various heterostructured polymer-coated nanoplatelet stacks with different spacing were synthesized and characterized. The unprecedented lowest spacing (<1 nm) between particles was demonstrated. (Photo)electrochemical measurements demonstrated the advantage of smaller spacing for charge carrier transport through much higher photocurrent densities.

The publication is also a success for the PhD program Hannover School for Nanotechnology (hsn). Rebecca Graf is a PhD student in the current program hsn-digital, Anja Schlosser was a PhD student in the previous program hsn-sensors, and Atasi Chatterjee (now at PTB Braunschweig) was a PhD student in the first program hsn-energy.

Congratulations from the LNQE!

Publication:

R. T. Graf, A. Schlosser, D. Zámbó, J. Schlenkrich, P. Rusch, A. Chatterjee, H. Pfnür, N. C. Bigall, Interparticle Distance Variation in Semiconductor Nanoplatelet Stacks, Advanced Functional Materials 2022, 2112621, DOI: 10.1002/adfm.202112621