Nowadays, the integration
of easy production, simple structure,
high sensitivity, and multifunctionality is the developing tendency
for flexible sensors. Herein we report a facile manufacture of a highly
flexible, sensitive, and multifunctional dual-mode sensor with an
ultrasimple structure by directly attaching magnetic iron rubber (IR)
onto the surface of carbon aerogel (CA) derived from melamine foam.
The dual-mode CA/IR sensor exhibits high sensitivities of 5.6 kPa–1 and 1.6·10–3 Oe–1, respectively, toward pressure and magnetic field in a wide frequency
ranging from 0.1 to 10 Hz, which are higher than those of the existing
flexible pressure/magnetism sensors. The multifunctionality of the
dual-mode CA/IR sensor is demonstrated by monitoring blood pulse,
human breath, balloon volume, and thoracic volume via pressure and
magnetism sensing or their combination. Due to its simple structure
and high sensitivities, the dual-mode sensor is employed as the building
block to create a direction-recognizable sensor for identifying the
directions of pressure and magnetic field for the awareness of surrounding
barriers that are of practical importance in sophisticated situations
such as autonomous artificial intelligence, autodriving and robotics,
and so on.
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