Progress in electrical property measurements of micro-nano materials for smart wearable sensors

Abstract

Advancing electrical measurement methods for the interior key micro-nano materials can promote the overall performance and parameter optimization of smart wearable sensors. In order to systematically illustrate different electrical measurement methods and principles, electrical property measurements of micro-nano materials for smart wearable sensors can be summarized comprehensively from the perspective of integrated smart wearable sensor and all-in-one smart wearable sensor. Three key indexes including cyclic stability, sensitivity and volt-ampere characteristic are employed to carry out the detailed summary analysis. Firstly, the cyclic stability measurements of smart wearable sensor materials are reviewed based on the sensing ranges and cyclic stretching times. The effects of preparation methods and materials on cyclic stability have been proved. The bending voltage measurement, long-distance resistance measurement and constant velocity resistance measurement possess the low strain, large measuring range and good stability, respectively. Secondly, the sensitivity measurements of smart wearable sensor materials are reviewed. The characteristics of measurement methods are compared from different material processing effects and material structures. The constant velocity material measurement has a high accuracy effect, but the high strain measurement possesses a wide monitoring range. Furthermore, volt-ampere characteristic measurements of materials have been summarized to demonstrate that the linear mass measurement and high range strain measurement possess the high-precision results. Finally, the conclusion and development prospects of smart wearable sensor are discussed, and the further research directions of measurement technology are proposed in future.