Highly selective and ultra-low power consumption metal oxide based hydrogen gas sensor employing graphene oxide as molecular sieve

Rasch F, Postica V, Schutt F, Mishra YK, Nia AS, Lohe MR, Feng X, Adelung R, Lupan O (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Sensors and Actuators B-Chemical Elsevier

Book Volume: 320

Article Number: 128363

DOI: 10.1016/j.snb.2020.128363

Abstract

The excellent gas sensing performance of metal oxide based nano- and microstructures, including a fast response time and good sensitivity, is typically limited by their low selectivity. Therefore, novel approaches and strategies are required to gain a precise control of the selectivity. Here, we introduce a nanoporous few-layer graphene oxide (GO) membrane with permeability only to specific gas molecules to improve the selectivity of individual zinc oxide microwires (ZnO MWs) toward hydrogen (H2) gas. The fabricated GO-covered ZnO MWs showed ultra-low power consumption (60−200 nW) and an excellent room temperature H2 gas sensing properties with fast response (114 s) and recovery (30 s) times, and a low detection limit of ∼4 ppm, while no gas response was measured to all other tested gases. As proposed, the gas sensing mechanism is based on selective sieving of H2 gas molecules through the GO membrane and further diffusion to the Schottky contacts, resulting in a decreased barrier height. Being based on a bottom-up fabrication approach, the presented results could have great potential for further technological applications such as high-performance and highly selective ultra-low power metal oxide-based gas sensors, opening new opportunities for the design of nanosensors and their integration in wireless and portable devices.

Involved external institutions

Christian-Albrechts-Universität zu Kiel DE Germany (DE) Technical University of Moldova MD Moldova, Republic of (MD) University of Southern Denmark / Syddansk Universitet DK Denmark (DK) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Rasch, F., Postica, V., Schutt, F., Mishra, Y.K., Nia, A.S., Lohe, M.R.,... Lupan, O. (2020). Highly selective and ultra-low power consumption metal oxide based hydrogen gas sensor employing graphene oxide as molecular sieve. Sensors and Actuators B-Chemical, 320. https://doi.org/10.1016/j.snb.2020.128363

MLA:

Rasch, Florian, et al. "Highly selective and ultra-low power consumption metal oxide based hydrogen gas sensor employing graphene oxide as molecular sieve." Sensors and Actuators B-Chemical 320 (2020).

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