Fiber-based sensors are desirable to provide an immersive experience for users in the human–computer interface. We report a hierarchically porous silver nanowire-bacterial cellulose fiber that can be utilized for sensitive detection of both pressure and proximity of human fingers. The conductive fiber was synthesized via continuous wet-spinning at a speed of 20 m/min, with a diameter of 53 μm, the electrical conductivity of 1.3 × 10⁴ S/cm, a tensile strength of 198 MPa, and elongation strain of 3.0% at break. The fibers were coaxially coated with a 10 μm thick poly(dimethylsiloxane) dielectric elastomer to form the fiber sensor element which is thinner than a human hair. Two of the sensor fibers were laid diagonally, and the capacitance changes between the conductive cores were measured in response to pressure and proximity. In the touch mode, a fiber-based sensor experienced monotonic capacitance increase in the pressure range from 0 to 460 kPa, and a linear response with a high sensitivity of 5.49 kPa^–1 was obtained in the low-pressure regime (<0.5 kPa). In touchless mode, the sensor is highly sensitive to objects at a distance of up to 30 cm. Also, the fiber can be easily stitched into garments as comfortable and fashionable sensors to detect heartbeat and vocal pulses. A fiber sensor array is able to serve as a touchless piano to play music and accurately determine the proximity of an object. A 2 × 2 array was further shown for two- and three-dimensional location detection of remote objects.

中文翻译：

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银纳米线-细菌纤维素复合纤维基传感器，用于压力和接近度的高灵敏度检测

基于光纤的传感器需要在人机界面中为用户提供身临其境的体验。我们报告了可用于敏感检测人类手指压力和接近度的分层多孔银纳米线-细菌纤维素纤维。导电纤维是通过以20 m / min的速度连续湿纺，直径为53μm，电导率为1.3×10 ^4的方式合成的S / cm，抗张强度为198 MPa，断裂伸长率为3.0％。将纤维同轴涂覆有10μm厚的聚（二甲基硅氧烷）介电弹性体，以形成比人的头发还细的纤维传感器元件。两条传感器纤维沿对角线放置，并根据压力和接近度测量了导电芯之间的电容变化。在触摸模式下，基于光纤的传感器在0至460 kPa的压力范围内经历了单调电容增加，并具有5​​.49 kPa ^–1的高灵敏度线性响应在低压状态（<0.5 kPa）下获得的碳。在非接触模式下，传感器对长达30厘米的物体高度敏感。同样，光纤可以轻松缝制到衣服上，成为舒适而时尚的传感器，以检测心跳和声音脉搏。光纤传感器阵列能够用作非接触式钢琴来播放音乐并准确确定物体的接近程度。还显示了一个2×2阵列，用于远程物体的二维和三维位置检测。