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. 2020 Jul 29;20(15):4215. doi: 10.3390/s20154215

Figure 2.

Figure 2

The fiber sensors coated with PDMS: (a) Tapered fiber embedded in PDMS [21]; (b) Core-fiber with PDMS cladding [22]; (c) Bowknot taper fiber coated with PDMS [23]; (d) S-shaped taper fiber coated with PDMS [24].