UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Ultrasensitive hydrogen detection by electrostatically formed silicon nanowire decorated by palladium nanoparticles

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. Green open access

[thumbnail of Mukherjee_Ultrasensitive_H_detection_S&AB_accepted.pdf]
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
Downloads since deposit
59Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item