Fig. 4: Functional demonstration of the temperature sensor.
From: Flexible temperature-pressure dual sensor based on 3D spiral thermoelectric Bi2Te3 films
a Monitoring the human breath by testing the pulse voltage signal. b Thermoelectric responses to finger touch loading–unloading cycles. c Application of a sensor as a temperature switch, which can sense cold and warm to control an LED light. Upon touching the sensor with a finger, the red light activates. Conversely, there is no illumination when the sensor is touched with a pen. Additionally, placing an ice cube on the sensor triggers the blue light to illuminate. d Application of the sensor as a multistage temperature switch. Source data are provided as a Source Data file.
