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QI: Fachverband Quanteninformation
QI 32: Quantum Sensing and Metrology
QI 32.10: Talk
Friday, March 22, 2024, 12:15–12:30, HFT-FT 131
Toward probing thin films with quantum sensors in diamonds — •Martin Wanckel1,2,3, Verena Streibel2,3, Fabian Freire1, Ian D. Sharp2,3, and Dominik Bucher1 — 1Department of Chemistry ,TUM School of Natural Sciences, Technische Universität München, 85748, Garching, Germany — 2Walter Schottky Institute, Am Coulombwall 4, 85748, Garching, Germany — 3Department of Physics,TUM School of Natural Sciences, Technische Universität München, 85748, Garching, Germany
Nuclear magnetic resonance (NMR), one of the most powerful analytical techniques in chemistry and the life sciences, is typically limited to macroscopic volumes due to its inherently low sensitivity. This limitation excludes NMR spectroscopy from the analysis of planar surfaces or interfaces. In recent years, it has been shown that NMR signals can be detected from nanoscale volumes by a new sensor class - quantum sensors based on defects in the diamond lattice - nitrogen-vacancy (NV) centers [1]. In this contribution, we will present our recent results, where we used an ensemble of NV centers to detect the NMR signal of a self-assembled monolayer on an aluminum oxide layer. This discussion includes the detection of spatially resolved NMR signals and the monitoring of the layer formation in real-time at the solid-liquid interface. In the outlook, we will discuss possible further applications, such as probing thin film materials in catalysis and energy science. Reference: 1.Liu, Kristina S., et al. Surface NMR using quantum sensors in diamond. PNAS 2022 Vol. 119 No. 5 e2111607119.
Keywords: NV Diamonds; Quantum sensing; Thin film NV NMR