Flexible temperature sensor with high sensitivity ranging from liquid nitrogen temperature to 1200 °C

Abstract

Flexible temperature sensors have been extensively investigated due to their prospect of wide application in various flexible electronic products. However, most of the current flexible temperature sensors only work well in a narrow temperature range, with their application at high or low temperatures still being a big challenge. This work proposes a flexible thermocouple temperature sensor based on aerogel blanket substrate, the temperature-sensitive layer of which uses the screen-printing technology to prepare indium oxide and indium tin oxide. It has good temperature sensitivity, with the test sensitivity reaching 226.7 μV °C−1 . Most importantly, it can work in a wide temperature range, from extremely low temperatures down to liquid nitrogen temperature to high temperatures up to 1200 °C, which is difficult to be achieved by other existing flexible temperature sensors. This temperature sensor has huge application potential in biomedicine, aerospace and other fields.

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

“…Since these characteristics enable real-time temperature monitoring, an LED bulb was integrated into the device to turn on and off as the temperature increased or decreased. Lin et al 160 proposed a flexible thermocouple temperature sensor based on an alumina–silicon oxide aerogel as a substrate and indium oxide (In 2 O 3 ) and indium tin oxide (ITO) as active materials by a screen-printing technique for aerospace, metallurgy, and explosion damage detection applications, among others. The fabricated sensor operated under harsh conditions over a very wide temperature range from −196 °C up to 1200 °C, with a sensitivity of up to 226.7 μV °C –1 , a maximum peak-to-peak output voltage of 0.23 mV, a repeatability error of ±1.72%, and a response time of ∼5 ms, meeting the requirements of daily life, as well as laser processing and construction machinery, with characteristics that are difficult to achieve by other sensors in this field.…”

Evolution of Thermoelectric Generators: From Application to Hybridization

“…Likewise, the Seebeck coefficient of the material and the temperature gradient directly affect the output power. [51][52][53][54][79][80][81][82][83][84]88,[90][91][92][93][94][95][192][193][194][195][196][197][198][199][200][201][202][203][204][205][206] Therefore, when designing and preparing TEGs, we should choose the structure type and thermoelectric layer material of TEGs reasonably according to the actual application requirements and the application temperature range.…”

A laser-engraved wearable gait recognition sensor system for exoskeleton robots

“…In the past decade, the development of flexible electronics has provided sensors with a lightweight and favorable comfort 6 – 10 . Various flexible sensors, such as pressure sensors, temperature sensors and humidity sensors, have been designed and demonstrated to track human physical activities 11 – 19 . However, flexible sensors usually suffer from batch-to-batch variations as a result of limited fabrication techniques and methods, which hinders their application in real-life systems.…”