Temat: 81.07.Gf - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Characteristic properties of Dy-Eu-Ce Co-doped ZrO₂ nanofibers fabricated via electrospinning
Autorzy:: Çıçek Bezır, N.
Evcın, A.
Kayali, R.
Kaşikçi Özen, M.
Esen, K.
Cambaz, E.
Tematy:: 81.07.-b
81.07.Gf; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1070411.pdf Link otwiera się w nowym oknie
Opis:: Zirconium oxide (ZrO₂) is one of the widely studied oxide materials because of its excellent electrical, mechanical and optical properties. In this study, undoped and Dy-Eu-Ce co-doped ZrO₂ nanofibers were fabricated by electrospinning method and their crystal structure, surface morphology, optical properties, electrical and electronic properties, and chemical properties have been analyzed using X-ray diffraction, scanning electron microscope (SEM), UV/VIS spectrometer, four point probe technique (FPPT) energy dispersive X-ray (EDX) measurements, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Characteristic Properties of Dy-Eu-Ag co-Doped TiO₂ Nanoparticles Prepared by Electrospinning Processes
Autorzy:: Evcin, A.
Bezir, N.
Kayalı, R.
Kaşıkçı, M.
Oktay, A.
Tematy:: 73.63.Bd
81.07.gf; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1402357.pdf Link otwiera się w nowym oknie
Opis:: TiO₂ with high photoactive wide band gap energy semiconductor has been studied intensively for its attractive applications as photo catalyst and solar cell. TiO₂ has three kinds of different crystal structures; anatase, brookite and rutile. TiO₂-nanoparticles could become valuable light emitting materials when they are doped with highly luminescent rare earth ions. In this study, Dy-Eu-Ag co-doped TiO₂ nano particles were prepared by electrospinning method. The crystal structures of nanofibers were determined X-Ray Diffraction device (XRD), morphology of the samples were analyzed by scanning electron microscope (SEM), and the optical properties of the samples were determined by ultraviolet/visible spectrometer (UV/VIS) measurements. Electrical and electronic properties of the sampled were determined using the data obtained from four point prob technique (FPPT).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Magnetoresistance of Electrochemically Produced NiFe and CoNiFe Nanowires
Autorzy:: Avcu, D.
Atalay, F.
Aydogmus, E.
Kaya, H.
Atalay, S.
Tematy:: 81.07.Gf
81.15.Pq
75.75.-c; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1215584.pdf Link otwiera się w nowym oknie
Opis:: CoNiFe and NiFe nanowires were electrochemically produced by dc electrodeposition on highly ordered porous anodic alumina oxide templates. Scanning electron microscope images of nanowires after removing the alumina membrane showed that these nanowires are uniform with the diameters of about 220-300 nm and about 25-30 μm length. The energy dispersive X-ray analysis showed that the composition of the nanowires is $Ni_{88}Fe_{12}$, $Co_7Ni_{82}Fe_{11}$. Magnetic field was applied by an electromagnet and resistance was measured by four point technique.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Electrochemical Impedance of Sn Nanowire Arrays
Autorzy:: Kaya, H.
Aydogmus, E.
Avcu, D.
Tematy:: 81.07.Gf
81.15.Pq
82.80.Fk; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1218401.pdf Link otwiera się w nowym oknie
Opis:: In this study, Sn nanowires were produced electrochemically in anodic aluminum oxide membranes. During the deposition process some parameters such as ion content, pH, deposition time, and temperature of solution were kept constant. The scanning electron microscope results showed that the diameters of produced tin nanowires were approximately 300 nm and their lengths were about 8-10 μm. Electrochemical impedance studies of Sn nanowire arrays were also studied by Iviumstat galvanostat/potentiostat system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of Layer Thickness on I-V Characteristics of GaInP Nanofibers Fabricated by Electrospinning on n-Si Substrates
Autorzy:: Çiçek Bezir, N.
Evcin, A.
Okçu, H.
Kayali, R.
Kaleli, M.
Aldemir, D.
Tematy:: 81.07.-b
73.61.Le
81.07.Gf; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1031924.pdf Link otwiera się w nowym oknie
Opis:: GaInP nanofibers were formed on n-Si substrates by electrospinning method, using constant voltage (25 kV), height (6 cm), and flow rate (0.3 ml/h) during various process times (of 10, 20, 25 minutes). Characterization of the prepared samples was performed by X-ray diffraction, differential scanning calorimetry/thermal gravimetric analysis, scanning electron microscopy, and energy dispersive X-ray spectrometry. Furthermore, the current-voltage measurements of the GaInP/n-Si samples have been carried out. The obtained results show that I-V characteristics of all GaInP/n-Si samples fabricated with three thicknesses of GaInP layers are rather in a good agreement with the theory and that they exhibit rectifying properties.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Production of Y-Ba-Cu-O Nanowires and Nanotubes by Electrochemical Method
Autorzy:: Kaya, H.
Atalay, F.
Avsar, D.
Yagmur, V.
Atalay, S.
Tematy:: 81.07.Gf
81.07.De
81.15.Pq
74.78.-w; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399690.pdf Link otwiera się w nowym oknie
Opis:: In this work, the technological aspects of great importance $YBa_2Cu_3O_{7-x}$ superconducting materials were produced in the form of nanotube by electrochemical method. The electrochemical deposition conditions for the Y-Ba-Cu deposition in nanoporous $Al_2O_3$ were investigated. The heat treatment was applied to $Y-Ba-Cu//Al_2O_3$ nanopatterns, to form superconductive phase. The resulting nanostructures were found to be in length 4-5 μm, 177-210 nm in diameter. The produced nanostructures at - 4 V and more positive potentials were Y-Ba-Cu nanowires, while the nanostructures deposited at the more negative potentials were of nanotube form.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Scaling Behaviour of Chirality Dependent Domain Wall Pinning in Planar Nanowires
Autorzy:: Eastwood, D.
Bogart, L.
Atkinson, D.
Tematy:: 75.60.Ch
75.78.Cd
81.07.Gf; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1506885.pdf Link otwiera się w nowym oknie
Opis:: Micromagnetic modelling is used to establish the dimensional scaling dependence of the magnetic fields required for domain wall injection and chirality dependent pinning in planar permalloy nanowires with asymmetric structural notches. The wire width, thickness and notch constriction width are systematically varied whilst the axial magnetization is reversed under a globally applied magnetic field. A component of magnetic field transverse to the direction of propagation is applied throughout the reversal to control the domain wall chirality, and therefore determine the strength of pinning at the notch. We deduce that thicker wires with a narrower width cause larger depinning fields and stronger chirality dependent pinning, an observation relevant for domain wall memory applications, and particularly those exploiting chirality dependent pinning in nanowires.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Magnetoimpedance Effects in Electrodeposited NiFe Nanowire Array
Autorzy:: Aydogmus, E.
Kaya, H.
Atalay, F.
Atalay, S.
Avcu, D.
Tematy:: 81.07.Gf
81.15.Pq
75.75.-c; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1207745.pdf Link otwiera się w nowym oknie
Opis:: In this work, NiFe nanowires were grown in highly ordered porous anodic alumina oxide templates by dc electrodeposition at a pH value of 2.6. Scanning electron microscopy showed that wires have diameters of about 250-310 nm and length 25-30 μm. The energy dispersive X-ray analysis showed that the composition of the nanowires is $Ni_{65}Fe_{35}$. Electrical contacts were made on both sides of the nanowire array and their magnetoimpedance properties were investigated. All the magnetoimpedance curves showed single peak behavior due to the high shape anisotropy. The maximum magnetoimpedance change at the 79 MHz driving current frequency was ≈ 1.45%.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Fabrication and Study of the Magnetic Properties of $(Fe_{30}Co_{70})_{100-x}Zn_{x}$ Nanowire Arrays
Autorzy:: Sedghi, A.
Zolfi, F.
Vali Aghaie, S.
Tematy:: 81.07.Gf
81.15.Pq
75.75.-c; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1400557.pdf Link otwiera się w nowym oknie
Opis:: $(Fe_{30}Co_{70})_{100-x}Zn_{x}$ (0 ≤ x ≤ 10) nanowires with diameters of ≈ 37 nm have been fabricated by AC electrodeposition into pores of anodized aluminum oxide (AAO) templates. The $Fe_{30}Co_{70}$ and Zn contents of the nanowires have been adjusted by varying the ratio of $Fe_{30}Co_{70}$ and Zn ion concentrations in the electrolyte. The effect of the Zn content and annealing on the magnetic properties (e.g., coercivity and squareness) of nanowires arrays have been investigated using X-ray diffraction, scanning electron microscopy, and alternating gradient force magnetometer. X-ray diffraction patterns reveal that an increase in the concentration of Zn ions of the electrolyte results in significant reduction in coercivity and squareness. It was found that the magnetic properties of nanowires can be significantly improved by appropriate annealing process. The highest values for coercivity (2670 Oe) and squareness (0.99) have been obtained for nanowires electrodeposited using 95/5 and 98/2 $Fe_{30}Co_{70}:Zn$ concentrations at annealing temperatures of 575°C and 550°C, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Magnetoresistance of Electrodeposited Co/Cu Multilayer Nanowires
Autorzy:: Avcu, D.
Atalay, F.
Atalay, S.
Kaya, H.
Aydogmus, E.
Tematy:: 81.07.Gf
81.15.Pq
75.75.-c; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1401297.pdf Link otwiera się w nowym oknie
Opis:: Co/Cu multilayer nanowires were electrodeposited potentiostatically on highly ordered porous anodic alumina oxide templates. Scanning electron microscopy (SEM) showed that wires have diameters of about 250-300 nm and length of 40-50 μm. Co/Cu multilayer nanowire arrays embedded in anodic alumina oxide were mechanically polished with diamond in a suspension of oil until the wires appeared. Then the top and bottom surfaces of the material were coated with a layer of Au with a thickness of 100 nm for electrical contacts. Magnetic field was applied by an electromagnet and resistance was measured by four point technique.
Dostawca treści:: Biblioteka Nauki

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