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Ultra-Low-Power, Extremely Stable, Highly Linear-Response Thermal Conductivity Sensor Based on a Suspended Device with Single Bare Pt Nanowire
ACS Sensors ( IF 8.2 ) Pub Date : 2024-08-30 , DOI: 10.1021/acssensors.4c01111 Zipeng Wu 1 , Xudong Zhang 1 , Lina Chen 1 , Qi Lou 1 , Dehua Zong 1 , Kelun Deng 1 , Zhaofang Cheng 1 , Minggang Xia 1, 2
ACS Sensors ( IF 8.2 ) Pub Date : 2024-08-30 , DOI: 10.1021/acssensors.4c01111 Zipeng Wu 1 , Xudong Zhang 1 , Lina Chen 1 , Qi Lou 1 , Dehua Zong 1 , Kelun Deng 1 , Zhaofang Cheng 1 , Minggang Xia 1, 2
Affiliation
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The continuous and stable monitoring by sensors is crucial for ensuring the safe utilization of hydrogen due to its inherent high explosiveness. Currently, catalyst aging and oxygen dependence often limit the lifetime of most sensors, which stems from the sensing materials and catalytic reaction in comparison to thermal conductivity sensors. Thermal conductivity sensors possess superior sensing characteristics such as lowpower consumption and exceptional stability attributed to their free-catalysts or free-oxygen nature. Herein, we present an ultralow-power hydrogen-thermal conductivity sensor based on suspended bare platinum nanowires. This sensor incorporates two suspended independent working elements (serpentine/bridge), each of which is thermally decoupled from the substrate. Also, the bridge element operates at significantly lower power levels (the lowest ∼3.32 μW) compared to existing direct-current hydrogen-thermal conductivity sensors. Furthermore, it demonstrates a 99.99% linearity between hydrogen concentration and response under various operating powers. Finally, our sensor shows remarkable stability through a repeatability test (>30,000 cycles). This developed platform provides an optimal structure scheme for integrated sensors with ultralow-power, extremely stable, highly linear-response sensing characteristics, which is expected to be widely used for hydrogen detection and leakage warning under various pipeline distribution systems.
中文翻译：
基于单裸 Pt 纳米线悬浮器件的超低功耗、极其稳定、高线性响应热导率传感器
由于氢气固有的高爆炸性，传感器的持续稳定监测对于确保氢气的安全利用至关重要。目前，催化剂老化和氧气依赖性常常限制大多数传感器的寿命，这源于与热导传感器相比的传感材料和催化反应。热导率传感器具有卓越的传感特性，例如低功耗和由于其无催化剂或无氧性质而具有的出色稳定性。在此，我们提出了一种基于悬浮裸铂纳米线的超低功耗氢热导传感器。该传感器包含两个悬挂的独立工作元件（蛇形/桥式），每个元件都与基板热解耦。此外，与现有的直流氢热导率传感器相比，该电桥元件的工作功率水平显着降低（最低~3.32 μW）。此外，它还表明在各种操作功率下氢气浓度和响应之间具有 99.99% 的线性度。最后，我们的传感器通过重复性测试（>30,000 次循环）显示出卓越的稳定性。该平台为具有超低功耗、极其稳定、高线性响应传感特性的集成传感器提供了优化的结构方案，有望广泛应用于各种管道分配系统下的氢气检测和泄漏报警。
更新日期：2024-08-30
中文翻译：
基于单裸 Pt 纳米线悬浮器件的超低功耗、极其稳定、高线性响应热导率传感器
由于氢气固有的高爆炸性，传感器的持续稳定监测对于确保氢气的安全利用至关重要。目前，催化剂老化和氧气依赖性常常限制大多数传感器的寿命，这源于与热导传感器相比的传感材料和催化反应。热导率传感器具有卓越的传感特性，例如低功耗和由于其无催化剂或无氧性质而具有的出色稳定性。在此，我们提出了一种基于悬浮裸铂纳米线的超低功耗氢热导传感器。该传感器包含两个悬挂的独立工作元件（蛇形/桥式），每个元件都与基板热解耦。此外，与现有的直流氢热导率传感器相比，该电桥元件的工作功率水平显着降低（最低~3.32 μW）。此外，它还表明在各种操作功率下氢气浓度和响应之间具有 99.99% 的线性度。最后，我们的传感器通过重复性测试（>30,000 次循环）显示出卓越的稳定性。该平台为具有超低功耗、极其稳定、高线性响应传感特性的集成传感器提供了优化的结构方案，有望广泛应用于各种管道分配系统下的氢气检测和泄漏报警。
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