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Photographs of the fluorescence detection system used in Telechemistry 2.0 setup. (a) 3D-printed fluorometric probe with optical fibers and 3D-printed light-proof holders for LED and photoresistor; (b) components inside the disassembled light-proof holders; (c) side view of the fluorometric probe; (d) photograph depicting the orthogonal alignment of optical fibers at the fluorometric probe-head.
