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HL: Fachverband Halbleiterphysik
HL 29: Materials and devices for quantum technology I
HL 29.7: Talk
Wednesday, March 29, 2023, 17:00–17:15, POT 151
Sensing of electrolytes with nitrogen-vacancy centers in nanodiamonds — •Maximilian Hollendonner1,2, Sanchar Sharma2, Durga Dasari3, Silvia Viola Kusminskiy2,4, and Roland Nagy1 — 1Chair of Electron Devices, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany — 2Max Planck Institute for the Science of Light, Staudtstraße 2, Erlangen, Germany — 33rd Institute of Physics, University of Stuttgart and Institute for Quantum Science and Technology (IQST), Stuttgart, Germany — 4Institute for Theoretical Solid State Physics, RWTH Aachen University, Aachen, Germany
Today’s batteries suffer from performance losses with increasing cell age which is caused by irreversible degradation processes at a molecular level. To understand these processes, it is important to measure them in-situ and in-operando. Up to now there exists no sensor which can perform this task with sub-micrometer resolution. We propose to use nanodiamonds containing single NV-centers as such sensors inside the liquid electrolyte of a battery. It has been shown that NV-centers are excellent electric field sensors [1,2]. From theoretical considerations we found out that by performing repeated FID pulse sequences it is not only possible to measure the electric field components generated by the ions inside the electrolyte but also the local ionic concentrations at the position of the nanodiamond with nanometer-resolution.
Sources: [1] F. Dolde et al., Nature Phys 7, 459-463 (2011) [2] J. Michl et al., Nano Lett. 2019, 19, 8, 4904-4910