Biomimetic skin sensing devices play an important role in next-generation healthcare, robotics, and bioelectronics. In recent years, biomimetic skin-sensing technologies have gained significant attention due to their broad-ranging utility in the fields of healthcare and automation, and future wearable devices designed for health monitoring, robotic applications, and ultra-precise industrial positioning will necessitate the incorporation of flexible optical systems. A novel photonic skin flexible sensor (PSFS) based on partially neutralized sodium polyacrylate (PAS-50) is reported for the first time in this paper. In this study, a novel wearable sensor was designed for real-time detection of temperature and humidity. A single-mode tapered fiber (SMTF) structure based on the principle of evanescent wave is proposed for fast response and real-time monitoring of humidity and temperature. The sensor incorporates an optical micro/nanofiber (MNF) as the core sensing node, while a hydrophilic and ductile Sodium Polyacrylate (PAS) is chosen as the humidity-sensitive material that overcomes the limitation of commonly reported electrical, optical, and material-based flexible devices. Due to the strain amplification effect of the MNF, the sensitivity of the material to relative humidity (RH) is significantly improved, reaching 0.1411 dB/%. In addition, the temperature response exhibits outstanding sensitivity (0.4 dB/°C) in the human skin surface temperature range (30 ∼ 48 °C). Notably, the sensor exhibits a rapid response with a remarkable response time of 170 ms. The proposed PSFS presents novel opportunities for the advancement of future biomimetic skin devices, thus playing a pivotal role in the advancement of next-generation robotics and medical monitoring technologies.

中文翻译：

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一种基于涂有聚丙烯酸钠薄膜的锥形微纳米纤维结构的新型光子皮肤传感器

仿生皮肤传感设备在下一代医疗保健、机器人和生物电子学中发挥着重要作用。近年来，仿生皮肤传感技术因其在医疗保健和自动化领域的广泛应用而受到广泛关注，未来用于健康监测、机器人应用和超精密工业定位的可穿戴设备将需要结合仿生皮肤传感技术。灵活的光学系统。本文首次报道了一种基于部分中和聚丙烯酸钠（PAS-50）的新型光子皮肤柔性传感器（PSFS）。在这项研究中，设计了一种新型可穿戴传感器，用于实时检测温度和湿度。提出了一种基于倏逝波原理的单模锥形光纤（SMTF）结构，用于快速响应和实时监测湿度和温度。该传感器采用光学微/纳米纤维（MNF）作为核心传感节点，同时选择亲水性和延展性聚丙烯酸钠（PAS）作为湿度敏感材料，克服了通常报道的基于电学、光学和材料的限制。灵活的设备。由于MNF的应变放大效应，材料对相对湿度（RH）的敏感性显着提高，达到0.1411 dB/%。此外，温度响应在人体皮肤表面温度范围（30 ∼ 48 °C）内表现出出色的灵敏度（0.4 dB/°C）。值得注意的是，该传感器表现出快速响应，响应时间高达 170 毫秒。拟议的 PSFS 为未来仿生皮肤设备的发展提供了新的机会，从而在下一代机器人和医疗监测技术的发展中发挥着关键作用。