A Pressure and Temperature Dual-Parameter Sensor Based on a Composite Material for Electronic Wearable Devices

Abstract

Wearable sensors integrating multiple functionalities are highly desirable in artificial wearable devices, which are of great significance in the field of biomedical research and for human–computer interactions. However, it is still a great challenge to simultaneously perceive multiple external stimuli such as pressure and temperature with one single sensor. Combining the piezoresistive effect with the negative temperature coefficient of resistance, in this paper, we report on a pressure–temperature dual-parameter sensor composed of a polydimethylsiloxane film, carbon nanotube sponge, and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate). The proposed multifunctional sensor can stably monitor pressure signals with a high sensitivity of 16 kPa−1, has a range of up to 2.5 kPa, and also has a fast response time. Meanwhile, the sensor can also respond to temperature changes with an ultrahigh sensitivity rate of 0.84% °C−1 in the range of 20 °C to 80 °C. To validate the applicability of our sensor in practical environments, we conducted real-scene tests, which revealed its capability for monitoring = human motion signals while simultaneously sensing external temperature stimuli, reflecting its great application prospects for electronic wearable devices.

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

“…At present, the standard methods of personal healthcare are mostly based on outdated techniques using bulky and heavy equipment, complicated and often difficult to access. Furthermore, patients frequently experience discomfort and even pain due to the invasive methods used to collect samples and data. , Besides, wearable technology has evolved in recent years from wrist-worn fitness trackers to multipurpose sensors for real-time monitoring of physiological signals such as heart rate, blood oxygen levels, hydration, temperature, and sleep patterns. , These new technologies make it easier to detect diseases in their early stages and to monitor their progression and treatment. As an emerging analytical tool, it can be placed on different parts of the body to collect biochemical and physiological parameters based on physical, chemical, and biological data through the skin.…”

“…Furthermore, patients frequently experience discomfort and even pain due to the invasive methods used to collect samples and data. 1 , 2 Besides, wearable technology has evolved in recent years from wrist-worn fitness trackers to multipurpose sensors for real-time monitoring of physiological signals such as heart rate, 3 blood oxygen levels, 4 hydration, 5 temperature, 6 and sleep patterns. 7 , 8 These new technologies make it easier to detect diseases in their early stages and to monitor their progression and treatment.…”

Editorial for the Special Issue on Flexible and Wearable Sensors

“…In this Special Issue on Flexible and Wearable Sensors, we have included 25 papers, including 24 research papers, covering applications in human-computer interaction [ 1 , 2 , 3 ], mechanical design [ 4 , 5 , 6 , 7 , 8 ], health monitoring [ 9 , 10 , 11 , 12 , 13 , 14 , 15 ], manufacturing technology [ 16 , 17 , 18 , 19 , 20 ], algorithms [ 21 , 22 , 23 ], and smart cities [ 24 ]. Additionally, we feature an intriguing review paper focusing on flexible wearable sensor devices for biomedical applications [ 25 ].…”