Fiber-sensors based on embedded 2D-Materials

2D-Materials are ideal for nanoscale sensing applications. Consisting almost completely of surface, they do interact strongly with many aspects of the environment. Their strong light-matter interaction also allows for the remote readout of their status with comparable ease.

We aim to explore new and scalable ways to integrate 2D-materials into optical fibers for gas- and other environmental sensing applications. These integrated 2D-materials will be used to investigate fundmental aspects of how the environment influences the light-matter-interaction in 2D-materials, regarding fluorescence lifetimes, spectra and valley-excitonic properties.

2D-Materials in Fluorescent Imaging for the Life Sciences

Fluorescence microscopes are the workhorse for life sciences. They work with fluorescent dyes, which emit light of a particular color, when irradiated by short-wavelength laser-light. These dyes can be modified to attach to certain target molecules and thus be used to directly image biological and biochemical processes in cell. However, all of these dyes tend to decay into toxic substances after the emission of only a few photons, limiting their use to non-medical applications and short-term investigations.

We instead propose to utilize highly fluorescent TMDC-nanoparticles for some of the applications. They can be easily fabricated, are highly biocompatible and can emit a virtually unlimited number of photons without bleaching. Our research focus on the demonstration of the feasibility of TMDCs for microscopy applications, high-yield laser-based methods for their creation and the development of adaptive optical microscopes for deep-tissue imaging, using TMDCs are fluorescent guide-stars.

(left) An optical fiber with embedded 2D-Materials is an ideal platform for remote sensing. (right) Suspensions of fluorescent 2D-Nanoparticles.

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