Berlin 2024 – scientific programme

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QI: Fachverband Quanteninformation

QI 18: Poster II

QI 18.14: Poster

Wednesday, March 20, 2024, 11:00–14:30, Poster A

Microfluidic quantum sensing platform for lab-on-a-chip applications — •Robin D. Allert, Fleming Bruckmaier, Nick R. Neuling, Karl D. Briegel, and Dominik B. Bucher — Department of Chemistry, Technical University of Munich, 85748 Garching, Germany

Lab-on-a-chip (LOC) applications have emerged as invaluable physical and life sciences tools. The advantages stem from the advanced system miniaturization of microfluidics, requiring far less sample volume while allowing for complex functionality, increased reproducibility, and higher throughput. However, LOC applications require extensive sensor miniaturization to leverage these inherent advantages fully. Atom-sized quantum sensors, such as the nitrogen-vacancy (NV) center in diamond, promise to bridge this gap, enabling sensing of temperature, electric and magnetic fields on the nano- to microscale. Nevertheless, the technical complexity of both disciplines has so far impeded an uncompromising combination of LOC systems and quantum sensors. Here, we present a fully integrated microfluidic platform for NV centers in diamond, enabling full quantum sensing capabilities while being biocompatible and easily adaptable to arbitrary channel and chip geometries. To illustrate the potential of quantum sensors in LOC systems, we demonstrate various NV center-based sensing modalities for chemical analysis in our microfluidic platform, ranging from paramagnetic ion detection to high-resolution NMR spectroscopy. Consequently, our work opens the door for novel chemical analysis capabilities within LOC devices with applications in electrochemistry, or bioanalytics.

Keywords: Microfluidics; Quantum sensing; Nitrogen-vacancy center; Lab-on-a-Chip; NMR spectroscopy