Structural and physical properties of NbO2 and Nb2O5 thin films prepared by magnetron sputtering

Hossain, Nazmul; Güneş, Ozan; Zhang, Chunzi; Koughia, Cyril; Li, Yuanshi; Wen, Shi-Jie; Wong, Rick; Kasap, S. O.; Yang, Q.

doi:10.1007/s10854-019-01319-8

Cited by 30 publications

(23 citation statements)

References 43 publications

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“…The angular vibrations ν(Nb-O-Nb) between peaks 227 and 316 cm − 1 were assigned to the NbO 4 tetrahedron. Peaks at 697 cm − 1 were attributed to the (Nb-O) symmetrical stretches of the (NbO 6 − 7 ; NbO 7 − 9 ; NbO 8 − 11 ) polyhedra, and the peak at 803 cm − 1 was ascribed to the symmetrical stretching of the (Nb = O) surface group(Lopes et al 2014;Hossain et al 2019). The Raman spectra corroborate to XRD, showing the Nb 2 O 5 orthorhombic phase exclusively in all samples.…”

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confidence: 60%

Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants

Jesus

Moreira

Sá

et al. 2021

Environ Sci Pollut Res

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Due to the pollution caused by different organic pollutants, various photocatalytic nanomaterials for environmental remediation have been promoted. In this study, Nb 2 O 5 nano bers were obtained by electrospinning technique, presenting controlled crystallinity and high speci c surface area to improve the photoactivity response. The structural characterization indicated Nb 2 O 5 nano bres with orthorhombic phase formation, and the photoluminescence measurements showed different energy levels contributing to the electronic transition events. The nano bers with a bandgap up to 3.6 eV were applied to photocatalysis of dyes [Rhodamine B (RhB) or Methylene Blue (MB)], and Prozac®, listed as an emergent pollutant. In the optimized condition (pH = 9), the RhB and MB photocatalysis was 59% and 93% more e cient than photolysis due to ζ = − 50 ± 5 mV for EtOH_550 sample that increased the interaction with MB (cationic) compared to RhB unprotonated (pKa = 3.7). Therefore, Prozac® (pKa = 10.7) was selected due to protonated form at pH = 9 and showed 68% ±1 adsorption in 30 min for EtOH_550. The Prozac® photocatalytic degradation under UV light irradiation was up to 17% higher than the photolytic degradation. The formation of hydroxyl radicals in the photocatalytic system (EtOH_550) was proven by the Coumarine probe assay, corroborating with the greater amount of α-[2-(Methylamino)ethyl]benzylalcohol (MAEB), a by-product obtained after Prozac® oxidation. Additionally, the material achieved speci c catalytic activity for the different organic compounds (RhB, MB, or Prozac®), showing that only using dyes may not be ideal to conclude the great material applicability in environmental remediation studies. Therefore, Nb 2 O 5 nano bers were e cient for the degradation of three different pollutants under UV light, proving to be a viable alternative for environmental remediation.

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supporting

confidence: 60%

Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants

Jesus

Moreira

Sá

et al. 2021

Environ Sci Pollut Res

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“…In this method, the porous mold acts as a scaffold, and various materials are placed inside its pores and form wired nanostructures [78][79][80]. e hard mold contains inorganic porous materials such as polymer membranes, anodic aluminum oxide, and carbon nanotubes [9,10]. e most commonly used hard molds are thin and porous anodic oxide films with various morphologies on aluminum sheets.…”

Section: Synthesis Of Metal Nanostructures With Controlled Morphologymentioning

confidence: 99%

“…Here, metal nanostructures act as a source of conversion of light into a local electric field (electromagnetic excitation along with mass oscillations of free electrons) in metals, called localized superficial plasmonic [6,7]. ese plasmatic interactions can be controlled by changing the morphology and dimensions of metal nanostructures [8][9][10]. Applications related to the field of nanoplasmatic include super lenses, Raman-enhanced surface spectroscopy (SERS), molecular spectroscopy, plasmonic-enhanced fluorescence, quantum computing, energy-dependent photochemical lithography, energy-assisted plasma ionization [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Morphological Control: Properties and Applications of Metal Nanostructures

Chupradit

Suksatan

et al. 2022

Advances in Materials Science and Engineering

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Metal nanomaterials with special physicochemical and plasmatic properties have a wide range of applications in various fields including catalysts, plasmon devices, spectroscopy, fuel cell, and various sensors including chemical, colorimetric, and fluorescence sensors. These applications are made possible by controlling the morphology and properties of nanostructures and increasing their selectivity. Various methods have been developed for the synthesis of metal nanostructures, including the use of prefabricated patterns or hard templates such as anodic aluminum oxide and soft molds such as cetyltrimethylammonium bromide (CTAB).

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“…While NbO 2 thin films can be grown by a variety of methods, atomic layer deposition (ALD) of NbO 2 has several advantages for electronic devices, including the ability to deposit thin, conformal films on arbitrary 3D substrates at low temperature and the ability to utilize digital doping techniques to deposit alloyed films by using alternating pulses of different chemical precursors. ,− However, ALD films are typically amorphous and have a Nb 2 O 5 stoichiometry. Producing crystalline NbO 2 from this material requires not only postdeposition crystallization but also postdeposition reduction, which we explore using a series of isothermal and isochronal anneals in forming gas at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

Crystallization Behavior of Zinc-Doped Nb₂O₅ Thin Films Synthesized by Atomic Layer Deposition

Kozen

Woodward

Ruppalt

et al. 2022

ACS Appl. Electron. Mater.

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Neuromorphic computational devices built from memristive materials provide a potential path toward improved power and computational efficiency in a merged biomimetic and CMOS architecture. The key to such a framework is developing materials that can be reliably engineered into neuromorphic devices and integrated with CMOS platforms. Niobium dioxide has volatile memristive properties that make it an ideal candidate for future neuromorphic electronics. In this study, we thermally crystallized and reduced thin films of amorphous niobium oxide (Nb2O5) that were deposited with atomic layer deposition. We found that doping the as-deposited niobium oxide with zinc led to a lower initial crystallization temperature, which is a necessary step toward neuromorphic integration with CMOS devices that have a strict thermal budget.

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Structural and physical properties of NbO2 and Nb2O5 thin films prepared by magnetron sputtering

Cited by 30 publications

References 43 publications

Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants

Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants

Morphological Control: Properties and Applications of Metal Nanostructures

Crystallization Behavior of Zinc-Doped Nb₂O₅ Thin Films Synthesized by Atomic Layer Deposition

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Structural and physical properties of NbO2 and Nb2O5 thin films prepared by magnetron sputtering

Cited by 30 publications

References 43 publications

Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants

Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants

Morphological Control: Properties and Applications of Metal Nanostructures

Crystallization Behavior of Zinc-Doped Nb2O5 Thin Films Synthesized by Atomic Layer Deposition

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Crystallization Behavior of Zinc-Doped Nb₂O₅ Thin Films Synthesized by Atomic Layer Deposition