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Figure 10. Flexible aerogel-based pressure sensors. (A) Schematic illustrating the fabrication process of a PANI/BC/CS aerogel and photographs showing its lightweight property. Reproduced with permission^[1]. Copyright 2019, Elsevier; (B) Schematic illustrating the fabrication process of a cellulose aerogel and photographs showing its application in motion detection. Reproduced with permission^[148]. Copyright 2020, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. (C) Schematic illustrating the fabrication process of strain sensors based on VN/CNTs and photographs showing their application in the instant controlling of a robot hand by demonstrating the gestures from “five” to “one”. Reproduced with permission^[149]. Copyright 2020, American Chemical Society. (D) Schematic illustrating the mechanism of a pressure sensor and photographs showing its installation at a specific position in the neck of a human subject for monitoring carotid artery and internal jugular vein pulses. Reproduced with permission^[79]. Copyright 2022, The Author(s), published by Nature. PANI: polyaniline; BC: bacterial cellulose; CS: chitosan; VN: vanadium nitride; CNT: carbon nanotube.