Flexible tactile sensor has been extensively investigated as a key component for emerging electronics applications such as robotics, wearable devices, computer hardware, and security systems. Tactile sensors based on various one-dimensional materials have been widely explored. However, precise control of the direction and distribution of these nanomaterials remains a great challenge, and it has been difficult to scale down the device. Here, we introduce highly sensitive integrated flexible tactile sensors based on uniform phase-change Ge₂Sb₂Te₅ (GST) thin films that can scale device size down, at least, to micrometer range. Significant piezoresistive effect has been observed in GST-based sensors, showing a giant gauge factor of 338. A proof of concept 5 × 5 sensor array functioning as a touch panel has been demonstrated. Also, the flexible GST tactile sensor has been utilized for monitoring of radial artery pulse. In addition to the well-known tunable electrical and optical properties, the piezoresistive GST films provide a versatile platform for the integration of sensing, recording, and displaying functions.

柔性触觉传感器已被广泛研究为新兴电子应用（例如机器人，可穿戴设备，计算机硬件和安全系统）的关键组件。已经广泛地探索了基于各种一维材料的触觉传感器。然而，精确控制这些纳米材料的方向和分布仍然是一个巨大的挑战，并且很难缩小器件的尺寸。在这里，我们介绍基于均匀相变Ge ₂ Sb ₂ Te _5的高灵敏集成柔性触觉传感器（GST）薄膜可以将器件尺寸缩小至至少微米级。在基于GST的传感器中观察到了显着的压阻效应，显示出338的巨大规格系数。已经证明了5×5传感器阵列可作为触摸面板的概念证明。而且，柔性GST触觉传感器已用于监测radial动脉脉搏。除了众所周知的可调电和光学特性，压阻GST膜还提供了集成感测，记录和显示功能的多功能平台。