Ju Kuan, Gao Yang, Xiao Ting, Yu Cunjiang, Tan Jianpin, Xuan Fuzhen
School of Mechanical and Power Engineering, East China University of Science and Technology Shanghai 200237 China
Department of Mechanical Engineering, University of Houston Houston TX 77204, USA.
RSC Adv. 2020 May 18;10(32):18694-18703. doi: 10.1039/d0ra02217a. eCollection 2020 May 14.
Paper-based sensing platforms hold promise in human physiological health monitoring, soft robots, and indoor environment monitoring, owing to their cost effectiveness, flexibility, disposability, and biodegradability. However, most of the existing paper-based sensors require complex fabrication procedures which are also associated with high-cost. Herein, we report a simple yet effective manufacturing process of paper-based carbonaceous sensors based on a laser direct writing (LDW) method. Specifically, carbonaceous pressure, temperature, and humidity sensors on cardboard are developed for human physiological signal monitoring and indoor environment monitoring. Due to the external force induced compaction of the layered carbon flakes, the LDW pressure sensor array has a sensitivity of ∼-0.563 kPa, a broad sensing range (0.009-50 kPa), and a high mechanical durability (over 11 000 cycles), all of which are promising for human health monitoring. The LDW-temperature and humidity devices have sensitivities of -0.002/°C and 36.75 fF per %RH, respectively. A prototype is developed using cardboard integrated with temperature and humidity sensors, which not only serves as an ornament to decorate homes but also works as a sensor platform for indoor environment monitoring. Systematic investigation of the LDW manufacturing process, sensing mechanisms, and sensor design and evaluation illustrates the key aspects of carbonaceous sensors.
基于纸张的传感平台因其成本效益、灵活性、可丢弃性和生物降解性，在人体生理健康监测、软体机器人和室内环境监测方面具有广阔前景。然而，现有的大多数基于纸张的传感器需要复杂的制造工艺，且成本高昂。在此，我们报道了一种基于激光直写（LDW）方法的简单而有效的纸质碳质传感器制造工艺。具体而言，开发了用于人体生理信号监测和室内环境监测的硬纸板上的碳质压力、温度和湿度传感器。由于外力导致层状碳片压实，LDW压力传感器阵列具有约-0.563 kPa的灵敏度、较宽的传感范围（0.009 - 50 kPa）和较高的机械耐久性（超过11000次循环），所有这些对于人体健康监测都很有前景。LDW温度和湿度传感器的灵敏度分别为-0.002/°C和每%RH 36.75 fF。使用集成了温度和湿度传感器的硬纸板开发了一个原型，它不仅可以作为装饰家居的装饰品，还可以作为室内环境监测的传感器平台。对LDW制造工艺、传感机制以及传感器设计与评估的系统研究阐明了碳质传感器的关键方面。
