Mukherjee, A;
Gnaim, M;
Tov, IS;
Hargreaves, L;
Hayon, J;
Shluger, A;
Rosenwaks, Y;
(2021)
Ultrasensitive hydrogen detection by electrostatically formed silicon nanowire decorated by palladium nanoparticles.
Sensors and Actuators B: Chemical
, 346
, Article 130509. 10.1016/j.snb.2021.130509.
Preview |
Text
Mukherjee_Ultrasensitive_H_detection_S&AB_accepted.pdf - Accepted Version Download (980kB) | Preview |
Abstract
Developing high performance hydrogen (H_{2}) sensors is of utmost importance to facilitate the safe usage of H_{2} as the alternative source of clean and renewable energy. We present an ultra-sensitive H_{2} sensor 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 × 10^{6} % (0.8 % H_{2} exposure) and a sensitivity of ∼400 % ppm^{−1} is 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 H^{2} sensors. 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 H_{2} sensor.
| Type: | Article |
|---|---|
| Title: | Ultrasensitive hydrogen detection by electrostatically formed silicon nanowire decorated by palladium nanoparticles |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.snb.2021.130509 |
| Publisher version: | https://doi.org/10.1016/j.snb.2021.130509 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Electrostatically formed silicon nanowire, Palladium nanoparticles, Hydrogen sensing, Kelvin probe force microscopy |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10134939 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
