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- W3202508965 abstract "• CuO thin films can be used as a potential caffeine sensing material for beverages. • CuO samples represent a linear sensing response with caffeine concentrations in the range of 0.5 mM to 10 mM. • Sensing efficiency increased with annealing. In this study, we demonstrated the feasibility of nanostructured CuO thin film usage for caffeine sensing. Our morphological studies revealed that ellipse- or spiral-shaped nanostructured were formed with good crystal qualities. It was shown that the film thickness was decreased from 803 nm to 717 nm with annealing. Better crystalline quality of annealed films resulted in higher sensing response. Moreover, caffeine sensing response time was decreased to 19 s from 28 s for annealed films compared to as-grown CuO films. Both films exhibited excellent linearity with higher than 0.93 R 2 values for the caffeine values from 0.5 mM to 10 mM, which is the range for most caffeinated hot and cold beverages. Caffeine is considered the only legal stimulant and its excessive use is not healthy. Knowing the caffeine content of beverages using portable, cheap sensor devices will be beneficial for the health-conscious society. We believe our sensing scheme in using nanostructured semiconductor thin films will pave the way to ultimately create advanced materials-based portable sensor devices." @default.
- W3202508965 created "2021-10-11" @default.
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- W3202508965 date "2021-12-01" @default.
- W3202508965 modified "2023-10-06" @default.
- W3202508965 title "A first-principle study of nanostructured CuO thin film-based caffeine sensing scheme" @default.
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- W3202508965 doi "https://doi.org/10.1016/j.sna.2021.113138" @default.
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