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. 2019 Oct 16;19(20):4478. doi: 10.3390/s19204478

Figure 16.

Figure 16

(a) Experimental set up used by Li et al. (b) Spectra change for a microfiber hydrogen sensor when H2 concentrations varied from 0.2 to 1 vol%. Reprinted with permission from [17]. Copyright 2018 Materials Letters.