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. 2019 Feb 15;10:795. doi: 10.1038/s41467-019-08675-3

Fig. 1.

Fig. 1

Preparation of cellulose-based ratiometric fluorescent materials. a Synthetic routes of CA-FITC and CA-PpIX. b Cellulose-based dual-emission solid fluorescent materials with different mix ratio of CA-PpIX to CA-FITC (w/w), namely 1:0, 5:1, 3:1, 2.5:1, 1.5:1, 1:1, 1:2, 1:3, 0:1, respectively, under 365 nm UV light