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Hydrogen gas sensing using aluminum doped ZnO metasurfaces

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Abstract

Hydrogen (H2) sensing is crucial in a wide variety of areas, such as industrial, environmental, energy and biomedical applications. However, engineering a practical, reliable, fast, sensitive and cost-effective hydrogen sensor is a persistent challenge. Here we demonstrate hydrogen sensing using aluminum-doped zinc oxide (AZO) metasurfaces based on optical read-out. The proposed sensing system consists of highly ordered AZO nanotubes (hollow pillars) standing on a SiO2 layer deposited on a Si wafer. Upon exposure to hydrogen gas, the AZO nanotube system shows a wavelength shift in the minimum reflectance by ∼13 nm within 10 minutes for a hydrogen concentration of 4%. These AZO nanotubes can also sense the presence of a low concentration (0.7%) of hydrogen gas within 10 minutes. Their rapid response time even for a low concentration, the possibility of large sensing area fabrication with good precision, and high sensitivity at room temperature make these highly ordered nanotube structures a promising miniaturized H2 gas sensor.

Graphical abstract: Hydrogen gas sensing using aluminum doped ZnO metasurfaces

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Supplementary files

Article information


Submitted
12 Apr 2020
Accepted
17 Jun 2020
First published
18 Jun 2020

This article is Open Access

Nanoscale Adv., 2020, Advance Article
Article type
Paper

Hydrogen gas sensing using aluminum doped ZnO metasurfaces

S. Chatterjee, E. Shkondin, O. Takayama, A. Fisher, A. Fraiwan, U. A. Gurkan, A. V. Lavrinenko and G. Strangi, Nanoscale Adv., 2020, Advance Article , DOI: 10.1039/D0NA00289E

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