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Nanomaterials
Volume 10
Issue 6
10.3390/nano10061047
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Open AccessCommunication

Aero-Ga2O3 Nanomaterial Electromagnetically Transparent from Microwaves to Terahertz for Internet of Things Applications

by
Tudor Braniste
1,*,
Mircea Dragoman
2,
Sergey Zhukov
3,
Martino Aldrigo
2,
Vladimir Ciobanu
1,
Sergiu Iordanescu
2,
Liudmila Alyabyeva
3,
Francesco Fumagalli
4,
Giacomo Ceccone
4,
Simion Raevschi
5,
Fabian Schütt
6,
Rainer Adelung
6,
Pascal Colpo
4,
Boris Gorshunov
3 and
Ion Tiginyanu
1,7,*
1
National Center for Materials Study and Testing, Technical University of Moldova, Stefan cel Mare av. 168, 2004 Chisinau, Moldova
2
National Institute for Research and Development in Microtechnologies (IMT Bucharest), Erou Iancu Nicolae Street 126A, 077190 Voluntari, Romania
3
Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (State University), 9 Institutskiy per., 141701 Dolgoprudny, Russia
4
European Commission, Joint Research Centre (JRC), Via E. Fermi, 2749, 21027 Ispra, Italy
5
Department of Physics and Engineering, State University of Moldova, Alexei Mateevici str. 60, 2009 Chisinau, Moldova
6
Institute for Materials Science, Kiel University, Kaiserstr. 2, D-24143 Kiel, Germany
7
Academy of Sciences of Moldova, Stefan cel Mare av. 1, MD-2001 Chisinau, Moldova
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(6), 1047; https://doi.org/10.3390/nano10061047
Received: 4 May 2020 / Revised: 24 May 2020 / Accepted: 27 May 2020 / Published: 29 May 2020
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Abstract

In this paper, fabrication of a new material is reported, the so-called Aero-Ga2O3 or Aerogallox, which represents an ultra-porous and ultra-lightweight three-dimensional architecture made from interconnected microtubes of gallium oxide with nanometer thin walls. The material is fabricated using epitaxial growth of an ultrathin layer of gallium nitride on zinc oxide microtetrapods followed by decomposition of sacrificial ZnO and oxidation of GaN which according to the results of X-ray diffraction (XRD) and X-ray photoemission spectroscopy (XPS) characterizations, is transformed gradually in β-Ga2O3 with almost stoichiometric composition. The investigations show that the developed ultra-porous Aerogallox exhibits extremely low reflectivity and high transmissivity in an ultrabroadband electromagnetic spectrum ranging from X-band (8–12 GHz) to several terahertz which opens possibilities for quite new applications of gallium oxide, previously not anticipated. View Full-Text
Keywords: aero-Ga2O3; ultra-porous nanomaterial; extremely low reflectivity; electromagnetically transparent nanomaterial; X-band and terahertz frequencies aero-Ga2O3; ultra-porous nanomaterial; extremely low reflectivity; electromagnetically transparent nanomaterial; X-band and terahertz frequencies
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
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MDPI and ACS Style

Braniste, T.; Dragoman, M.; Zhukov, S.; Aldrigo, M.; Ciobanu, V.; Iordanescu, S.; Alyabyeva, L.; Fumagalli, F.; Ceccone, G.; Raevschi, S.; Schütt, F.; Adelung, R.; Colpo, P.; Gorshunov, B.; Tiginyanu, I. Aero-Ga2O3 Nanomaterial Electromagnetically Transparent from Microwaves to Terahertz for Internet of Things Applications. Nanomaterials 2020, 10, 1047. https://doi.org/10.3390/nano10061047

AMA Style

Braniste T, Dragoman M, Zhukov S, Aldrigo M, Ciobanu V, Iordanescu S, Alyabyeva L, Fumagalli F, Ceccone G, Raevschi S, Schütt F, Adelung R, Colpo P, Gorshunov B, Tiginyanu I. Aero-Ga2O3 Nanomaterial Electromagnetically Transparent from Microwaves to Terahertz for Internet of Things Applications. Nanomaterials. 2020; 10(6):1047. https://doi.org/10.3390/nano10061047

Chicago/Turabian Style

Braniste, Tudor; Dragoman, Mircea; Zhukov, Sergey; Aldrigo, Martino; Ciobanu, Vladimir; Iordanescu, Sergiu; Alyabyeva, Liudmila; Fumagalli, Francesco; Ceccone, Giacomo; Raevschi, Simion; Schütt, Fabian; Adelung, Rainer; Colpo, Pascal; Gorshunov, Boris; Tiginyanu, Ion. 2020. "Aero-Ga2O3 Nanomaterial Electromagnetically Transparent from Microwaves to Terahertz for Internet of Things Applications" Nanomaterials 10, no. 6: 1047. https://doi.org/10.3390/nano10061047

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