The analysis of exhaled breath is an increasingly important role in the provision of security and in the management of personal healthcare. The development of self‐powered, reliable, miniature low cost and noninvasive devices is fundamental to practical applications. However, most state‐of‐the‐art self‐powered systems are incorporating mechanical nanogenerators, which would promote contact failures of electronics and limit minimization of the monitoring system. This work outlines a new solution to this problem based on a self‐powered breath analyzer integrated with a hydroelectric nanogenerator (HENG), in which the nanogenerator extracts electrical power from biochemical energy. The output signal from the sensor in this device is highly sensitive to the concentration of ethanol exhaled in breath down to low detection limitation of 50 ppm. A high dynamic range is observed whereby a signal response of ≈80% relative to peak value is obtained under the exposure to gas containing 100 ppm of ethanol. Unlike conventional self‐powered breathing analyzers based on piezoelectric or triboelectric nanogenerators, mechanical vibrations are eliminated. The availability of this compact breath analyzer provides a new detection regime for gas sensing, and should facilitate the design of a wide range of self‐powered systems incorporated in the next generation of innovative electronic devices.

中文翻译：

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呼气驱动式水力发电纳米发电机，用于独立的非机械呼吸分析

呼气的分析在提供安全性和个人保健管理中的作用越来越重要。自供电，可靠，微型低成本和无创设备的开发对于实际应用至关重要。但是，大多数最先进的自供电系统都集成了机械纳米发电机，这会加剧电子设备的接触故障并限制监控系统的最小化。这项工作概述了一个与水力发电纳米发电机（HENG）集成的自供电式呼吸分析仪的新解决方案，在该分析仪中，纳米发电机从生化能中提取电能。该设备中传感器的输出信号对呼吸中呼出的乙醇浓度非常敏感，检测到的检测限为50 ppm。观察到较高的动态范围，从而在暴露于含100 ppm乙醇的气体下可获得相对于峰值约80％的信号响应。与传统的基于压电或摩擦电纳米发电机的自供电式呼吸分析仪不同，消除了机械振动。这款紧凑型呼气分析仪的推出为气体感测提供了一种新的检测方案，并应有助于设计下一代创新电子设备中集成的多种自供电系统。