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. 2018 Nov 12;6(2):1801467. doi: 10.1002/advs.201801467

Figure 6.

Figure 6

A) Color of fluorescent paper test strips under UV light before and after adding 10 µL of various concentrations of TNP solution: drop of water a), 10−12 b), 10−9 c), 10−7d), 10−5 e), 10−4 M f); B) calibration plot using our visual sensor based on paper strips in combination with a smartphone application for TNP detection; C) TCPQDs‐doped transparent chitosan film in daylight a), and visualization of TCPQDs‐doped chitosan fluorescent film under UV light with dark spot resulting from left thumb impression with TNP residual (lamp excitation at 365 nm) b).