Impedance characteristics of flexible strain sensors based on zero-dimensional carbon nanocomposites

Abstract

In recent years, researchers have used various methods to study flexible sensors based on carbon nanomaterials, among which impedance analysis has unique advantages in studying the sensor mechanism. In this paper, we investigated the impedance characteristics of a flexible zero-dimensional carbon nanocomposite strain sensor, establishing a simple electrical model by electrochemical impedance spectroscopy (EIS). Based on the model, the sensing mechanism of the flexible strain sensor was analyzed. The noise analysis theory of the flexible strain sensor was established, and it is proved that the noise of the sensor can be reduced significantly when an AC signal is applied, which will improve the accuracy of the sensor.