Nonlinear Conductive Graphene Composites for Pressure Sensing with a Linear Response and Voltage-Driven Thermal Correction.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40420683.
- Also identified by DOI 10.1002/adma.202503867 and PMC identifier 12355450.
- Licence recorded as CC BY-NC.
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Abstract
Thermal fluctuations pose a significant challenge to the signal stability of nanomaterial-based piezoresistive pressure sensors, limiting their effectiveness in applications such as electronic skin and robotics. Conventional temperature compensation strategies often rely on additional thermal sensors or complex calibration algorithms. Here, a flexible pressure sensor is reported featuring a nonlinear conductive graphene composite layer within a bilayer architecture, enabling bias voltage-controlled sensitivity without structural redesign. The sensor achieves ultra-high sensitivity (742.3 kPa<sup>-1</sup>), a broad linear sensing range of up to 800 kPa (R<sup>2</sup> = 0.99913), and excellent long-term durability over 10 000 cycles. Crucially, the unique nonlinear characteristics enable the bias voltage to function as an internal remote control for correcting temperature drifts between 25 and 60 °C, as demonstrated by precise manipulation in robotic grippers under varying temperature conditions. This work offers a universal strategy for building environmentally adaptive sensors, advancing the development of robust and high-precision wearable electronics.