In this paper, we propose that the sensibility of the flexible metal/CNTs composite sensor depends not only on work function, but also on Young’s modulus and chemical reaction on the surface. In regard to metals Au, Ag and Cu, the values of work function and Young’s modulus vary as sequences, Φ_Au > Φ_Cu > Φ_Ag, and E_Cu > E_Au > E_Ag, respectively; and the surface active stability is Au > Ag > Cu in the air. The experimental and theoretical results revealed that the sensibility of the sensors are GF_Au/CNTs-PDMS > GF_Ag/CNTs-PDMS > GF_Cu/CNTs-PDMS. Comparatively, the Cu/CNTs-PDMS sensor is of not only much higher comprehensive performances, such as high sensitivity, large strain range, good stability, durability and detection of the out-of-plane force than the traditional strain sensors, but also possible massive production due to its natural abundance and low price among there three metals sensors. Human health monitoring experiments demonstrate that the sensor possesses potential applications in abroad flexible intelligent systems, such as robot arm and finger control, facial expression and joint monitoring, as well as in burglar alarms, etc.

在本文中，我们提出柔性金属/ CNTs复合传感器的灵敏度不仅取决于功函，还取决于杨氏模量和表面上的化学反应。关于金属的Au，Ag和Cu，功函数和杨氏模量的值变化为序列，Φ_的Au >Φ_的Cu >Φ_的Ag，和E_的Cu >电子_的Au >电子_的Ag分别; 空气中的表面活性稳定性为Au> Ag> Cu。实验和理论结果表明，传感器的灵敏度为GF _{Au / CNTs-PDMS} > GF _{Ag / CNTs-PDMS} > GF _{Cu / CNTs-PDMS}。相比之下，Cu / CNTs-PDMS传感器不仅具有比传统应变传感器更高的综合性能，例如高灵敏度，大应变范围，良好的稳定性，耐用性和面外力检测，而且还可能三种金属传感器之间天然的丰富性和低廉的价格使其得以大量生产。人体健康监测实验表明，该传感器在国外灵活的智能系统中具有潜在的应用，例如机器人手臂和手指控制，面部表情和关节监测以及防盗警报器等。