Next Article in Journal
The Effect of a Polyester Nanofibrous Membrane with a Fibrin-Platelet Lysate Coating on Keratinocytes and Endothelial Cells in a Co-Culture System
Next Article in Special Issue
VOCs Sensing by Metal Oxides, Conductive Polymers, and Carbon-Based Materials
Previous Article in Journal
Controlled Growth of Silver Oxide Nanoparticles on the Surface of Citrate Anion Intercalated Layered Double Hydroxide
Previous Article in Special Issue
Enhanced Stability and Amplified Signal Output of Single-Wall Carbon Nanotube-Based NH3-Sensitive Electrode after Dual Plasma Treatment
Article

Morphology of Ga2O3 Nanowires and Their Sensitivity to Volatile Organic Compounds

1
Faculty of Microsystem Electronics and Photonics, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
2
Institute of Experimental Physics, University of Wrocław, Maxa Borna 9, 50-204 Wrocław, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Cappelletti
Nanomaterials 2021, 11(2), 456; https://doi.org/10.3390/nano11020456
Received: 17 January 2021 / Revised: 6 February 2021 / Accepted: 8 February 2021 / Published: 11 February 2021
(This article belongs to the Special Issue Nanomaterials for Gas Sensors Applications)
Gas sensitive structures made of nanowires exhibit extremally large specific surface area, and a great number of chemically active centres that can react with the ambient atmosphere. This makes the use of nanomaterials promising for super sensitive gas sensor applications. Monoclinic β-Ga2O3 nanowires (NWs) were synthesized from metallic gallium at atmospheric pressure in the presence of nitrogen and water vapor. The nanowires were grown directly on interdigitated gold electrodes screen printed on Al2O3 substrates, which constituted the gas sensor structure. The observations made with transmission electron microscope (TEM) have shown that the nanowires are monocrystalline and their diameters vary from 80 to 300 nm with the average value of approximately 170 nm. Au droplets were found to be anchored at the tips of the nanowires which may indicate that the nanowires followed the Vapor–Liquid–Solid (VLS) mechanism of growth. The conductivity of β-Ga2O3 NWs increases in the presence of volatile organic compounds (VOC) even in the temperature below 600 °C. The gas sensor based on the synthesized β-Ga2O3 NWs shows peak sensitivity to 100 ppm of ethanol of 75.1 at 760 °C, while peak sensitivity to 100 ppm of acetone is 27.5 at 690 °C. View Full-Text
Keywords: chemical gas sensors; chemiresistors; nanomaterials; nanowires; gallium oxide; metal oxide; volatile organic compounds; acetone; ethanol; thermal synthesis chemical gas sensors; chemiresistors; nanomaterials; nanowires; gallium oxide; metal oxide; volatile organic compounds; acetone; ethanol; thermal synthesis
Show Figures

Graphical abstract

MDPI and ACS Style

Krawczyk, M.; Suchorska-Woźniak, P.; Szukiewicz, R.; Kuchowicz, M.; Korbutowicz, R.; Teterycz, H. Morphology of Ga2O3 Nanowires and Their Sensitivity to Volatile Organic Compounds. Nanomaterials 2021, 11, 456. https://doi.org/10.3390/nano11020456

AMA Style

Krawczyk M, Suchorska-Woźniak P, Szukiewicz R, Kuchowicz M, Korbutowicz R, Teterycz H. Morphology of Ga2O3 Nanowires and Their Sensitivity to Volatile Organic Compounds. Nanomaterials. 2021; 11(2):456. https://doi.org/10.3390/nano11020456

Chicago/Turabian Style

Krawczyk, Maciej, Patrycja Suchorska-Woźniak, Rafał Szukiewicz, Maciej Kuchowicz, Ryszard Korbutowicz, and Helena Teterycz. 2021. "Morphology of Ga2O3 Nanowires and Their Sensitivity to Volatile Organic Compounds" Nanomaterials 11, no. 2: 456. https://doi.org/10.3390/nano11020456

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop