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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wolff, Niklas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Demonstration and STEM Analysis of Ferroelectric Switching in MOCVD‐Grown Single Crystalline Al0.85Sc0.15Ncitations
- 2024Demonstration and STEM Analysis of Ferroelectric Switching in MOCVD‐Grown Single Crystalline Al<sub>0.85</sub>Sc<sub>0.15</sub>Ncitations
- 2023Unlocking High‐Performance Supercapacitor Behavior and Sustained Chemical Stability of 2D Metallic CrSe<sub>2</sub> by Optimal Electrolyte Selectioncitations
- 2023Synthesis and Nanostructure Investigation of Hybrid β-Ga2 O3 /ZnGa2 O4 Nanocomposite Networks with Narrow-Band Green Luminescence and High Initial Electrochemical Capacitycitations
- 2022Ultrathin Al1−xScxN for Low‐Voltage‐Driven Ferroelectric‐Based Devicescitations
- 2022Investigation of Wafer-Level Fabricated Permanent Micromagnets for MEMScitations
- 2022Control of magnetoelastic coupling in Ni/Fe multilayers using He+ ion irradiationcitations
- 2021Atomic scale confirmation of ferroelectric polarization inversion in wurtzite-type AlScNcitations
- 2020Facile fabrication of semiconducting oxide nanostructures by direct ink writing of readily available metal microparticles and their application as low power acetone gas sensorscitations
- 2020Nanocharacterization of Functional Materials for Biomagnetic Sensing an Breath Analysis ; Charakterisierung funktionaler Nanomaterialien für biomagnetische Sensoren und Atemanalyse
- 2019Low-Temperature Solution Synthesis of Au-Modified ZnO Nanowires for Highly Efficient Hydrogen Nanosensorscitations
- 2019The effect of morphology and functionalization on UV detection properties of ZnO networked tetrapods and single nanowirescitations
- 2018Zinc oxide nanotetrapods with four different arm morphologies for versatile nanosensorscitations
- 2018ZnAl2O4-Functionalized Zinc Oxide Microstructures for Highly Selective Hydrogen Gas Sensing Applicationscitations
- 2016Single and networked CuO nanowires for highly sensitive p-type semiconductor gas sensor applicationscitations
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article
ZnAl2O4-Functionalized Zinc Oxide Microstructures for Highly Selective Hydrogen Gas Sensing Applications
Abstract
<p>In this work, a simple method of ZnAl<sub>2</sub>O<sub>4</sub>-functionalization of ZnO microstructures is presented. The different characterization methods (structural, chemical, and micro-Raman) demonstrated the presence of only ZnO and ZnAl<sub>2</sub>O<sub>4</sub> crystalline phases. ZnAl<sub>2</sub>O<sub>4</sub> nano-crystallites grow on the surfaces of ZnO 3D microstructures having diameters of 50–100 nm and with high density. Transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) results clearly show ZnAl<sub>2</sub>O<sub>4</sub> crystallites functionalizing zinc oxide tetrapod arms. The individual structures (microwires (MWs) and three-dimensional (3D) tetrapods (Ts)) are integrated into functional devices, suitable for gas sensing applications. All devices show excellent hydrogen gas selectivity at relatively low operating temperature in the range of 25–100 °C. The highest gas sensing performances are obtained based on individual ZnAl<sub>2</sub>O<sub>4</sub>-functionalized ZnO tetrapods (ZnAl<sub>2</sub>O<sub>4</sub>/ZnO-T, with an arm diameter (D) of ≈400 nm) and a response of ≈2 at 25 °C to 100 ppm of hydrogen gas (H<sub>2</sub>), while a ZnAl<sub>2</sub>O<sub>4</sub>/ZnO-MW (D ≈ 400 nm) shows only a response of ≈1.1. The Al-doped ZnO MW (D ≈ 400 nm) without ZnAl<sub>2</sub>O<sub>4</sub> elaborated in another work, chosen only for comparison reason, shows no response up to 800 ppm H<sub>2</sub> gas concentration. A gas sensing mechanism is proposed for a single ZnAl<sub>2</sub>O<sub>4</sub>/ZnO-T microstructure based sensor. The obtained results on ZnAl<sub>2</sub>O<sub>4</sub>/ZnO-T-based devices is superior to many reported performances of other individual metal oxide nanostructures with much lower diameter, showing promising results for room temperature H<sub>2</sub> gas sensing applications.</p>