Formation of bismuth oxide nanostructures by reactive plasma assisted thermal evaporation

Iljinas, Aleksandras; Marcinauskas, Liutauras

doi:10.1016/j.tsf.2015.10.031

Cited by 21 publications

(9 citation statements)

References 23 publications

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“…All oxide cobalt-oxide based Co 3 O 4 /ZnO based p-n photovoltaic heterostructures (ZnO being planar or in a nanowire arrangement) were also reported [286] , [289] . Bismuth oxides have also been investigated as potential oxides with an optical bandgap (Bi 2 O 3 bandgap ~2.4-3 eV) [290] , [291] . Morash et al [292] reported open circuit voltages of ~680 mV and short-circuit has attracted much attention because of its promising properties as photoanode in solar water splitting cells owing to its relatively narrow bandgap of 2.1 eV [293] .…”

Section: Otf As the Core: Light Harvestersmentioning

confidence: 99%

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Pérez‐Tomás

2019

Adv Materials Inter

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New device concepts and new computing principles are needed to balance our ever-growing appetite for data and information with the realization of the goals of increased energy efficiency, reduction in CO 2 emissions and the circular economy. Neuromorphic or synaptic electronics is an emerging field of research aiming to overcome the current computer's Von-Neumann bottleneck by building artificial neuronal systems to mimic the extremely energy efficient biological synapses. The introduction of photovoltaic and/or photonic aspects into these neuromorphic architectures will produce self-powered adaptive electronics but may also open up new possibilities in artificial neuroscience, artificial neural communications, sensing and machine learning which would enable, in turn, a new era for computational systems owing to the possibility of attaining high bandwidths with much reduced power consumption. This perspective is focused on recent progress in the implementation of functional oxide thinfilms into photovoltaic and neuromorphic applications towards the envisioned goal of selfpowered photovoltaic neuromorphic systems or a solar brain.

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Section: Otf As the Core: Light Harvestersmentioning

confidence: 99%

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Pérez‐Tomás

2019

Adv Materials Inter

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“…Gujar et al [41] explained that an increase in the band gap is due to changes in the crystallite size and the phase fraction of bismuth oxide. Furthermore, a reduction of defects or an increase in stoichiometric composition leads to an increase of the energy band gap [42,43]. Figure 8 shows the influences of the FS thickness, atomic concentration of the HBECs, and the oxygen/bismuth ratio on the band gap.…”

Section: Optical Characterizationmentioning

confidence: 99%

“…Catalysts 2019, 9, Furthermore, a reduction of defects or an increase in stoichiometric composition leads to an increase of the energy band gap [42,43]. Figure 8 shows the influences of the FS thickness, atomic concentration of the HBECs, and the oxygen/bismuth ratio on the band gap.…”

Section: Optical Characterizationmentioning

confidence: 99%

Bismuth Oxide Faceted Structures as a Photocatalyst Produced Using an Atmospheric Pressure Plasma Jet

Kohler¹,

Siebert²,

Kochanneck³

et al. 2019

Catalysts

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The photocatalyst bismuth oxide, which is active under visual light, was deposited using an atmospheric pressure plasma jet (APPJ). Sixteen different samples were generated under different parameters of the APPJ to investigate their catalytic activity. The prepared samples were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), laser scanning microscopy (LSM), and UV–vis diffuse reflectance absorption spectroscopy. The measured data, such as average sample thickness, coverage ratio, phase fraction, chemical composition, band gap, and photocatalytic performance were used for comparing the samples. The XRD analysis showed that the deposition process produced a mixed phase of monocline Bi2O3 and tetragonal Bi2O2.33. Using the Rietveld refinement method, phase fractions could be determined and compared with the XPS data. The non-stoichiometric phases were influenced by the introduction of nitrogen to the surface as a result of the deposition process. The band gap calculated from the diffuse absorption spectroscopy shows that Bi2O2.33 with 2.78 eV had a higher band gap compared to the phases with a high proportion of Bi2O3 (2.64 eV). Furthermore, it was shown that the band gap was dependent on the thickness of the sample and oxygen vacancies or loss of oxygen in the surface. All coatings had degraded methyl orange (MO) under irradiation by xenon lamps.

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“…With the increase of an aging time, the nearly monodisperse nanoparticles gradually comes into being which might be confirmed by transmission electron microscopy. The microspheres or custard‐apple shaped formation might be due to the non‐covalent interaction, orientation, and fusion of nanoparticles which lead to agglomeration that serves as crystal seed to grow microspheres . Most importantly, the development of uniform agglomerated microspheres might be due to homogeneous nucleation with constant and prolonged heating at higher temperature, conventional heating, longer time heating for nucleation might be enough but varied heat‐zones led to formation of bigger particles and wider distribution .…”

Section: Resultsmentioning

confidence: 99%

Microspheres/Custard‐Apples Copper (II) Chelate Polymer: Characterization, Docking, Antioxidant and Antibacterial Assay

Bagade

Chaudhary²,

Potbhare³

et al. 2019

ChemistrySelect

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In the present study we have reported fabrication and structural determination of 3D microspheres/custard‐apples shaped mesoporous CuII chelate polymer (CP) from a 1D chelating ligand for enhanced an antioxidant and antibacterial activities. The CP was fabricated from a novel chelating ligand suberoyl bis(2‐ethoxybenzamide) (sbebz) with copper salt by condensation, while sbebz was synthesized from 2‐ethoxybenzamide and suberoyl chloride, and was structurally authenticated by 1HNMR, 13CNMR, FT‐IR, Mass spectroscopy, XRD, and SEM. As‐fabricated CP was characterized by XRD, FT‐IR, EDS, UV‐DRS, XPS, Raman, SEM, TEM, AFM, BET, and TG for authentication of its structure, shape, size, chemical state, composition, purity, surface behavior, porosity, and thermal stability. SEM revealed nearly monodispersity in microspheres, while TEM rendered average particles sizes of 10–47 nm. AFM supported nearly homogenized nature of microspheres, while BET rendered a mesoporosity. Further, antioxidant property of CP was examined by using α, α‐diphenyl‐β‐picrylhydrazyl (DPPH) in ethanolic/methanolic solvents, while ascorbic acid was used as a standard medium. Furthermore, the antibacterial activity of both materials was tested against human pathogenic bacteria viz. gram +Ve (Staphylococcus aureus, and Bacillus substilis), and gram –Ve (Escherichia coli and Klebsiella pneumoniae). Moreover, molecular docking of sbebz was performed using both genetic (GA) and non‐genetic (Non‐GA) algorithm techniques, where result demonstrated an excellent docking energy.

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Formation of bismuth oxide nanostructures by reactive plasma assisted thermal evaporation

Cited by 21 publications

References 23 publications

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Bismuth Oxide Faceted Structures as a Photocatalyst Produced Using an Atmospheric Pressure Plasma Jet

Microspheres/Custard‐Apples Copper (II) Chelate Polymer: Characterization, Docking, Antioxidant and Antibacterial Assay

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