Graphene aerogel spheres (GASs), as one of the world’s lightest materials, is promising for constructing high-performance flexible sensors. Here, we demonstrated the capability of this material for sensing temperature, pressure and material elasticity. Our sensor exhibits an excellent temperature sensing property with a temperature coefficient of resistance (TCR) of 2.2 % C⁻¹, 5 times larger than that of commercial resistance thermometers. Due to the 3-D spherical shape, the GAS can detect forces in 360° from all directions. The GAS-based sensors exhibit an enhanced sensitivity of 0.15 kPa^-1, response and relaxation times of approximately 100 ms likely due to the unique micro/nanostructures of the GASs. Extraordinary cycling stability and long working life were also demonstrated even after large deformation. Assembling GASs with polydimethylsiloxane (PDMS), a flexible sensor was achieved with a large dynamic range from 4 mN to 2 N covering almost three orders of magnitudes. Moreover, we demonstrated three healthcare applications of GASs-based flexible sensors such as tissue elasticity sensing, finger posture sensing, and kinetic physiological signal monitoring.

石墨烯气凝胶球（GAS）作为世界上最轻的材料之一，有望用于构建高性能的柔性传感器。在这里，我们展示了这种材料对温度，压力和材料弹性的感应能力。我们的传感器具有出色的温度感应特性，其电阻温度系数（TCR）为2.2％C ^-1，是商用电阻温度计的5倍。由于采用3-D球形，因此GAS可以检测来自各个方向的360°力。基于GAS的传感器的灵敏度提高了0.15 kPa ^-1，由于GAS独特的微观/纳米结构，响应和弛豫时间可能约为100毫秒。即使大变形后，也显示出非凡的循环稳定性和长使用寿命。通过将GAS与聚二甲基硅氧烷（PDMS）组装在一起，实现了一种柔性传感器，其动态范围从4 mN到2 N，覆盖了几乎三个数量级。此外，我们展示了基于GASs的柔性传感器在医疗领域的三个应用，例如组织弹性感测，手指姿势感测和动态生理信号监控。