Together with Professor Lilac Amirav from the Technion in Haifa, Israel, the Jena scientist was able to use time-resolved absorption spectroscopy to show how metal nanoparticles on the nanorods must be structured in order to optimally influence their effect as photocatalysts. By determining the optimum size of the metal nanoparticle, Maria Wächtler and Lilac Amirav provided a result that is of relevance not only for the application in photocatalysis but for all areas in which charge separation is used at semiconductor/metal interfaces.
Maria Wächtler heads the work group „Ultra-short time spectroscopy“ within the research unit "Functional Interfaces" at Leibniz-IPHT. At the international "nanoGe Fall Meeting", researchers discuss new findings from areas such as renewable energies (photovoltaics, batteries), lighting, synthesis and fundamental processes in semiconductor quantum dots, 2D materials and bioimaging.
More information on the study by Maria Wächtler and Lilac Amirav can be found in the following publications: M. Wächtler, P. Kalisman, L. Amirav, Charge-Transfer Dynamics in Nanorod Photocatalysts with Bimetallic Metal Tips, J. Phys. Chem. C, 120 (2016), 24491-24497.
Y. Nakibli, Y. Mazal, Y. Dubi, M. Wächtler, L. Amirav, Size Matters: Cocatalyst Size Effect on Charge Transfer and Photocatalytic Activity, Nano Letters, 18 (2018), 357-364.