water splitting; scanning probes; electron dynamics; photoemission; molecular films; ambient pressure XPS; molecular catalysts; boron nitride; femtosecond lasers; magnetic molecules; graphene; 2D materials
Hengsberger Matthias, Leuenberger Dominik, Schuler Adrian, Roth Silvan, Muntwiler Matthias (2020), Dynamics of excited interlayer states in hexagonal boron nitride monolayers, in Journal of Physics D: Applied Physics
Hemmi Adrian, Cun Huanyao, Tocci Gabriele, Epprecht Adrian, Stel Bart, Lingenfelder Magalí, de Lima Luis Henrique, Muntwiler Matthias, Osterwalder Jürg, Iannuzzi Marcella, Greber Thomas (2019), Catalyst Proximity-Induced Functionalization of h-BN with Quat Derivatives, in Nano Letters
, 19(9), 5998-6004.
Cun Huanyao, Seitsonen Ari Paavo, Roth Silvan, Decurtins Silvio, Liu Shi-Xia, Osterwalder Jürg, Greber Thomas (2018), An electron acceptor molecule in a nanomesh: F4TCNQ on h-BN/Rh(111), in Surface Science
, 678, 183-188.
Chen Ming-Wei, Kim HoKwon, Bernard Carlo, Pizzochero Michele, Zaldıvar Javier, Pascual Jose Ignacio, Ugeda Miguel M., Yazyev Oleg V., Greber Thomas, Osterwalder Jürg, Renault Olivier, Kis Andras (2018), Electronic Properties of Transferable Atomically Thin MoSe 2 /h-BN Heterostructures Grown on Rh(111), in ACS Nano
, 12(11), 11161-11168.
Cun Huanyao, Hemmi Adrian, Miniussi Elisa, Bernard Carlo, Probst Benjamin, Liu Ke, Alexander Duncan T. L., Kleibert Armin, Mette Gerson, Weinl Michael, Schreck Matthias, Osterwalder Jürg, Radenovic Aleksandra, Greber Thomas (2018), Centimeter-Sized Single-Orientation Monolayer Hexagonal Boron Nitride With or Without Nanovoids, in Nano Letters
, 18(2), 1205-1212.
This proposal asks for funding for 3 Ph.D. students over a period of 48 months. It covers the following three projects:A) Transfer and stacking of single layer materialsExploiting the capacity for wafer-scale growth of h-BN monolayers and graphene on single-crystal metal surfaces and successful transfer of these films to arbitrary substrates, this projects aims to develop a materials platform for stacking macroscopic areas of 2D materials in a controlled way. Using surface science techniques, the crystal and electronic structure and the quality of these heterostacks will be characterized. Using ambient pressure XPS, the intercalation-assisted transfer procedure will be monitored in situ at the film-electrolyte interface in order to optimize the process parameters.B) Electron dynamics from time- and angle-resolved photoelectron spectroscopyThis project covers the last year of the PhD project of Adrian Schuler. He is currently commissioning the HHG source for femtosecond time-resolved photoemission experiments with photon energies of 20 eV. Once this is successfully achieved, the study of the generation, transfer times and decay rates of valley polarization in suitable materials like single layer hexagonal boron nitride can proceed. Starting with flat films of h-BN grown on Ni(111) we will study the selective population of valleys and inter-valley scattering in h-BN as function of film flatness and surface reconstruction.C) Surface science studies of molecular model catalystsProfiting from a university funded research priority program on solar water splitting, the group has embarked in a new line of research three years ago: model catalyst surfaces based on semiconductor surfaces and novel water reduction and water oxidation catalysts as well as photosensitizers are prepared and studied by surface science techniques. In order to increase the relevance of these studies, which are currently conducted in the UHV environment, we request one PhD position for performing ambient pressure XPS studies at photoelectrode-water interfaces. A second PhD position from project years 2-4 would secure the continued operation of the HHG source (Project B) for the study of the electron dynamics during light-induced charge transfer processes.