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Liquid Metal-Based Route for Synthesizing and Tuning Gas-Sensing Elements
journal contribution
posted on 2020-04-09, 13:42 authored by Shuhada
A. Idrus-Saidi, Jianbo Tang, Jiong Yang, Jialuo Han, Torben Daeneke, Anthony P. O’Mullane, Kourosh Kalantar-ZadehThere is a strong
demand for developing tunable and facile routes
for synthesizing gas-sensitive semiconducting compounds. The concept
of synthesizing micro- and nanoparticles of metallic compounds in
a tunable process, which relies on liquid metals, is presented here.
This is a liquid-based ultrasonication procedure within which additional
metallic elements (In, Sn, and Zn) are incorporated into liquid Ga
that is sonicated in a secondary solvent. We investigate liquid metal
sonication in dimethyl sulfoxide (DMSO) and water to show their impact
on the size, morphology, and crystal structure of the particulated
products. The synthesized materials are annealed to investigate their
responses to model reducing (H2) and oxidizing (NO2) gas species. The preparation process in DMSO gives rise
to predominantly monoclinic Ga2O3 crystals which
are favorable for gas sensing, while the emergence of rhombohedral
Ga2O3 phases from the water sonication process
led to inactive samples. The ease of tunability without hazardous
precursors during the synthesis procedure is demonstrated. The route
presented here can be uniquely employed for designing and engineering
on-demand functional materials for sensing applications.
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Keywords
particulated productscrystal structureLiquid Metal-Based RouteH 2gas speciesGa 2 O 3 crystalssynthesizing gas-sensitive semiconducting compoundsTuning Gas-Sensing Elementstunable processmetal sonicationpreparation processrhombohedral Ga 2 O 3 phasesdimethyl sulfoxidematerialliquid-based ultrasonication procedurewater sonication processsynthesis procedureDMSOengineering on-demand
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