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. 2021 Sep 3;7(1):2100545. doi: 10.1002/admt.202100545

Figure 10.

Figure 10

a) Fabrication process of the stretchable temperature sensor. b) Incorporation of the core–shell upconversion nanoparticles in the optical fiber. c) Flexibility of the optical fiber‐based sensor. d) Sensor's respond to different strains. e) Performance of the sensor in detecting body temperature. Reproduced with permission.[ 120 ] Copyright 2019, Wiley‐VCH.