Controlling electronic devices by touchless methods is a promising research field due to its application in healthcare, lifestyle monitoring, and human-computer interaction, providing users with more convenience and public safety. However, most of the functions are realized by capturing visual information using camera or radar sensors. Here, we demonstrate a flexible and relatively transparent touchless sensor achieving non-contact controlling on a single sensor pixel based on the surface charge redistributions under hand motions. Moreover, the optimized surface design method is analyzed and the output signals are increased by more than 200% after hierarchically nano-micro textures are fabricated on the sensing layer, providing the device with higher sensitivity. We further present the practical application of such sensors to skip or zoom a picture without laying fingers on the screen of computer, even under though-obstacle situations. This not only suggests promising applications of non-contact controlling methods but also presents a strategy for signal enhancement of near-field sensing technology.

由于其在医疗保健，生活方式监测和人机交互中的应用，为用户提供更多的便利和公共安全，因此通过非接触式方法控制电子设备是一个有前途的研究领域。但是，大多数功能是通过使用摄像头或雷达传感器捕获视觉信息来实现的。在这里，我们展示了一种灵活且相对透明的非接触式传感器，该传感器基于手运动下的表面电荷重新分布，实现了对单个传感器像素的非接触控制。此外，分析了优化的表面设计方法，并在传感层上制作了纳米微纹理后，输出信号增加了200％以上，从而为设备提供了更高的灵敏度。我们进一步介绍了这种传感器的实际应用，即使在障碍情况下，也无需将手指放在计算机屏幕上即可跳过或缩放图片。这不仅暗示了非接触控制方法的有希望的应用，而且提出了一种用于近场感测技术的信号增强的策略。