Highly sensitive and ultra-low Room Temperature O3 detection by self-powered sensing elements of Cu2O nanocubes

E. Petromichelaki, E. Gagaoudakis, K. Moschovis, Leonidas Tsetseris, Thomas D. Anthopoulos, George Kiriakidis, Vassilios Binas

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The fundamental development on the design of novel self-powered ozone sensing elements operating at room temperature based on p-type metal oxides pave the way to a new class of low cost highly promising gas sensing devices. Here, we synthesize a p-Type Cu2O nanocubes by a simple solution-based method and tested as self-power ozone sensing element, at room temperature (25°C) for a first time. High crystalline Cu2O nanocubes with 30nm size, were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Transmission Electron Microscopy (TEM). Self – powered sensing elements of Cu2O nanocubes has been succesfully fabricated by deposit of Cu2O nanocubes on interdigitated electrodes (IDE’s) consisting of two connection tracls with 500digits and a gap of 5μm in order to investigate their response to ozone at room temperature. The experimental results showed that the use of nanocubes as sensing element was suitable for detecting ultra – low concentrations of O3 down to 10 ppb at room temperature with very high sensitivity (28%) and very low response/recovery time. The reversible sensing process to the relatively weak binding of O3 species by trapping sites on Cu2O facets with increased oxygen content calculated by using density functional theory calculations.
Original languageEnglish (US)
Pages (from-to)2009-2017
Number of pages9
JournalNanoscale Advances
Issue number5
StatePublished - 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Current work was supported by Cost action TD1105 “EuNetAir” and by the EU FP7 Program (FP7-REGPOT-2012-2013-1) under grant agreement no. 316165. DFT calculations used computational resources provided by the Bibliotheca Alexandrina (see hpc.bibalex.org) and the GRNET HPC facility – ARIS – under projects AFOx and STEM. Part of this work was financially supported by the Stavros Niarchos Foundation within the framework of the project ARCHERS (“Advancing Young Researchers’ Human Capital in Cutting Edge Technologies in the Preservation of Cultural Heritage and the Tackling of Societal Challenges”). T.D.A. acknowledges financial support by the King Abdullah University of Science and Technology (KAUST).


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