Ultrasensitive hydrogen detection by electrostatically formed silicon nanowire decorated by palladium nanoparticles
Ultrasensitive hydrogen detection by electrostatically formed silicon nanowire decorated by palladium nanoparticles
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DOI：
10.1016/j.snb.2021.130509
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发表时间：
2021-11
影响因子：
8.4
通讯作者：
A. Mukherjee;Mohamad Gnaim;Idan Shem Tov;Laura Hargreaves;J. Hayon;A. Shluger;Y. Rosenwaks
中科院分区：
文献类型：
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作者：
A. Mukherjee;Mohamad Gnaim;Idan Shem Tov;Laura Hargreaves;J. Hayon;A. Shluger;Y. Rosenwaks
开发高性能的氢气（H2）传感器对于促进安全使用H2作为清洁和可再生能源的替代来源至关重要。我们提出了一种超灵敏的H2传感器工作在空气中，并基于静电形成的纳米线（EFN）传感器修饰的钯纳米粒子（Pd NPs）。通过适当调整EFN的各种栅极电压，在室温（20 ± 2 °C）下可获得极高的传感器响应度（0.8% H2暴露）和400% ppm− 1的灵敏度。据我们所知，该传感器优于大多数已报道的基于电阻和场效应晶体管（FET）的H2传感器。在最大电流工作时，EFN功耗从几pW到10436 nW不等，因此在室温下实现超低功耗。此外，该传感器具有快速的响应和恢复时间，即使在50%的相对湿度（RH）下也能保持良好的传感性能，并具有随时间推移的再现性。将Pd NPs与EFN平台的独特功能相结合，使Pd-EFN成为一种多功能，坚固，低功耗，快速和高灵敏度的H2传感器。
Developing high performance hydrogen (H2) sensors is of utmost importance to facilitate the safe usage of H2as the alternative source of clean and renewable energy. We present an ultra-sensitive H2sensor operating in air and based on electrostatically formed nanowire (EFN) sensor decorated by palladium nanoparticles (Pd NPs). By appropriate tuning of the various gate voltages of the EFN, an extremely high sensor response of ∼2 × 106% (0.8 % H2exposure) and a sensitivity of ∼400 % ppm−1is obtained at room temperature (20 ± 2 °C). This sensor outperforms, to the best of our knowledge, most of the reported resistive and field effect transistor (FET) based H2sensors. The EFN power consumption varies from few pW to ∼436 nW at maximum current operation thus enabling ultra-low power usage at room temperature. In addition, the sensor exhibits fast response and recovery times, retains good sensing performances even at 50 % relative humidity (RH) and exhibits reproducibility over time. Combining Pd NPs with the unique features of the EFN platform makes Pd-EFN a versatile, robust, low power, rapid, and highly sensitive H2sensor.