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. 2019 Nov 3;19(21):4781. doi: 10.3390/s19214781

Figure 8.

Figure 8

(a) Three-dimensional paper-based fluorescence detection of Cu2+ and Hg2+ [144]; (b) E. coli-based fluorescence detection of As(III) [146]; and (c) fluorescence detection of As(III) using portable bioreporter [145].