Espresso Science - Laser-Based Diamond Thin-Film Waveguide Sensors for the Quantification of Caffeine
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-04-26 |
| Journal | ACS Sensors |
| Authors | Andrea Teuber, Giada Caniglia, Michael Wild, Matthias Godejohann, Christine Kranz |
| Institutions | UniversitƤt Ulm, Hahn-Schickard-Gesellschaft fĆ¼r angewandte Forschung |
| Citations | 6 |
Abstract
Section titled āAbstractāDiamond thin-film waveguides with a nanocrystalline diamond layer of approximately 20 Ī¼m thickness were used in the mid-infrared regime in combination with quantum cascade lasers to detect the IR signature of caffeine. The diamond thin-film waveguides were fundamentally characterized with respect to their morphological properties via AFM and SEM. Theoretical simulations confirmed the feasibility of using a larger sensing area of approximately 50 mm<sup>2</sup> compared to conventionally used strip waveguides. A comprehensive and comparative analysis confirmed the performance of the diamond thin-film-waveguide-based sensing system vs data obtained via conventional attenuated total reflection Fourier transform infrared spectroscopy using a single-bounce diamond internal reflection element. Hence, the utility of innovative diamond thin-film-waveguide-based sensors coupled with quantum cascade laser light sources has been confirmed as an innovative analytical tool, which may be used in a wide range of application scenarios, ranging from environmental to medical sensing, taking advantage of the robustness and inertness of nanocrystalline diamond.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2011 - Effects of Caffeine on Sleep and Cognition
- 2020 - Food and Drugs, 21 CFR Ā§ 182