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

Figure 5.

Figure 5

a) Image of the fabricated sensor on the mask and its application. b) Changes in the resistance response under different relative humidity (from 12% to 97%). Reproduced with permission.[ 112 ] Copyright 2018, Elsevier. c) Changes in the capacitance under different relative humidity for a set of samples. Reproduced with permission.[ 115 ] Copyright 2017, The Royal Society of Chemistry. d) The fabrication process of the humidity sensor. e) Sensor performance in detecting different breathing patterns. f) Sensitivity of the sensor (changes in capacitance under different relative humidity). Reproduced with permission.[ 76 ] Copyright 2020, Elsevier.