Advanced Hybrid GaN/ZnO Nanoarchitectured Microtubes for Fluorescent Micromotors Driven by UV Light
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WOLFF, Niklas; CIOBANU, Vladimir; ENACHI, Mihail; KAMP, Marius; BRANIŞTE, Tudor; DUPPEL, Viola; SHREE, Sindu; RAEVSCHI, Simion; MEDINA-SANCHEZ, Mariana; ADELUNG, Rainer; SCHMIDT, Oliver; KIENLE, Lorenz; TIGINYANU, Ion. Advanced Hybrid GaN/ZnO Nanoarchitectured Microtubes for Fluorescent Micromotors Driven by UV Light. In: Small. 2020, nr. 2(16), p. 0. ISSN 1613-6810.
10.1002/smll.201905141
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Small
Numărul 2(16) / 2020 / ISSN 1613-6810 /ISSNe 1613-6829

Advanced Hybrid GaN/ZnO Nanoarchitectured Microtubes for Fluorescent Micromotors Driven by UV Light


DOI: 10.1002/smll.201905141
Pag. 0-0

Wolff Niklas1, Ciobanu Vladimir2, Enachi Mihail2, Kamp Marius1, Branişte Tudor2, Duppel Viola3, Shree Sindu1, Raevschi Simion4, Medina-Sanchez Mariana5, Adelung Rainer1, Schmidt Oliver5, Kienle Lorenz1, Tiginyanu Ion26
 
1 University of Kiel,
2 Technical University of Moldova,
3 Max Planck Institute for Solid State Research,
4 State University of Moldova,
5 Institut fuer Integrative Nanowissenschaften, Leibniz-Institut fuer Festkoerper- und Werkstoffforschung Dresden,
6 Academy of Sciences of Moldova
 
Disponibil în IBN: 13 martie 2020


Rezumat

The development of functional microstructures with designed hierarchical and complex morphologies and large free active surfaces offers new potential for improvement of the pristine microstructures properties by the synergistic combination of microscopic as well as nanoscopic effects. In this contribution, dedicated methods of transmission electron microscopy (TEM) including tomography are used to characterize the complex hierarchically structured hybrid GaN/ZnO:Au microtubes containing a dense nanowire network on their interior. The presence of an epitaxially stabilized and chemically extremely stable ultrathin layer of ZnO on the inner wall of the produced GaN microtubes is evidenced. Gold nanoparticles initially trigger the catalytic growth of solid solution phase (Ga1– xZnx)(N1– xOx) nanowires into the interior space of the microtube, which are found to be terminated by AuGa-alloy nanodots coated in a shell of amorphous GaOx species after the hydride vapor phase epitaxy process. The structural characterization suggests that this hierarchical design of GaN/ZnO microtubes could offer the potential to exhibit improved photocatalytic properties, which are initially demonstrated under UV light irradiation. As a proof of concept, the produced microtubes are used as photocatalytic micromotors in the presence of hydrogen peroxide solution with luminescent properties, which are appealing for future environmental applications and active matter fundamental studies.

Cuvinte-cheie
hierarchical structures, hybrid material, sphotocatalysis, surface modification, transmission electron microscopy

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<title xml:lang='en'><p>Advanced Hybrid GaN/ZnO Nanoarchitectured Microtubes for Fluorescent Micromotors Driven by UV Light</p></title>
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<subject>hierarchical structures</subject>
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<description xml:lang='en' descriptionType='Abstract'><p>The development of functional microstructures with designed hierarchical and complex morphologies and large free active surfaces offers new potential for improvement of the pristine microstructures properties by the synergistic combination of microscopic as well as nanoscopic effects. In this contribution, dedicated methods of transmission electron microscopy (TEM) including tomography are used to characterize the complex hierarchically structured&nbsp;hybrid&nbsp;GaN/ZnO:Au&nbsp;microtubes&nbsp;containing a dense nanowire network on their interior. The presence of an epitaxially stabilized and chemically extremely stable ultrathin layer of&nbsp;ZnO&nbsp;on the inner wall of the produced&nbsp;GaN&nbsp;microtubes&nbsp;is evidenced. Gold nanoparticles initially trigger the catalytic growth of solid solution phase (Ga<sub>1&ndash;</sub>&nbsp;<sub>x</sub>Zn<sub>x</sub>)(N<sub>1&ndash;</sub>&nbsp;<sub>x</sub>O<sub>x</sub>) nanowires into the interior space of the&nbsp;microtube, which are found to be terminated by AuGa-alloy nanodots coated in a shell of amorphous GaO<sub>x</sub>&nbsp;species after the hydride vapor phase epitaxy process. The structural characterization suggests that this hierarchical design of&nbsp;GaN/ZnO&nbsp;microtubes&nbsp;could offer the potential to exhibit improved photocatalytic properties, which are initially demonstrated under UV light irradiation. As a proof of concept, the produced&nbsp;microtubes&nbsp;are used as photocatalytic micromotors in the presence of hydrogen peroxide solution with luminescent properties, which are appealing for future environmental applications and active matter fundamental studies.</p></description>
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