Ions irradiation-induced defects study of copper nanowires

Honey, Shehla; Aisida, Samson O.; Jan, Tariq; Ahmad, Ishaq; Mehmood, Iram; Zhao, Tingkai; Mahmood, Asif; Maaza, M.

doi:10.1016/j.radphyschem.2020.108720

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…As seen from figure 3(a), no extra new peaks emerged in the irradiated sample, indicating a good crystalline stability for the Ag sheath. It is worth noting, however, that the intensity of all the diffraction peaks was significantly decreased after irradiation, similar to the deduction in the peak intensity of the Cu nanowires after 5 MeV H + and C + ion irradiation, caused by the structural defect formation [27].…”

Section: Xrdsupporting

confidence: 82%

Evaluation of irradiation effects on the microstructure and properties of Ag-sheathed Bi-2212 superconducting round wire for future application in CFETR

Zhu

Qiu

et al. 2020

Supercond. Sci. Technol.

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The Chinese Fusion Engineering Test Reactor (CFETR) is designed to build a fusion engineering Tokamak reactor generating fusion power of 200–1500 MW, and to test the breeding tritium during fusion reaction. This may require a maximum magnetic field up to 15 T in the central solenoid and toroidal field coils. New superconducting materials should be developed for satisfying the next-generation fusion reactors with critical requirements. Recently, Bi2Sr2CaCu2Ox (denoted as Bi-2212) is considered as one of the most promising potential superconductors to be used as the magnets in CFETR, however, they will be subjected to harsh irradiation under operating conditions. The irradiation effects of the high-energy helium ions on the Ag-sheathed Bi-2212 superconducting round wire have been explored for the first time in this work. The microstructure and the critical current at 4.2 K of the superconducting wire before and after irradiation have been carefully investigated. Room-temperature x-ray diffraction (XRD) profiles showed that all the peaks shifted rightward significantly with a broadened (111)Ag peak, indicating that the high-energy He+ irradiation resulted in appreciable defects and strain in the superconducting wire. Meanwhile, the in-situ high-temperature XRD tests showed that the lattice constant and the thermal expansion coefficient were deduced in the irradiated sample to be due to the presence of the generated defects. After irradiation, the grain size of the Ag sheath was refined, and the lattice of Bi-2212 superconductor was distorted obviously, as confirmed by transmission electronic microscopy. The critical current IC at 4.2 K of the superconducting wires in the field of 0–12T determined by the four-probe technique, decreased substantially after irradiation because of the lattice distortion and the consequently induced strain in the Bi-2212 superconductor. This work provides a solid basis for evaluating and understanding the irradiation effects upon the Ag-sheathed Bi-2212 superconducting wire, more promising for future application in CFETR.

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Section: Xrdsupporting

confidence: 82%

Evaluation of irradiation effects on the microstructure and properties of Ag-sheathed Bi-2212 superconducting round wire for future application in CFETR

Zhu

Qiu

et al. 2020

Supercond. Sci. Technol.

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“…In TEM results (see in figure 1), Ni-NWs with reduced diameters after Ar ± ions beam irradiation are confirming that atoms are sputtered /ejected from surface of Ni-NWs due to collision cascade effect. Similarly, XRD spectra in figure 3(a) are showing the reduction in intensities of XRD peaks after Ar ± ions beam irradiation which is the indication of existence of defects due to collision cascade effect [18,31,32]. The relative conductivity of Ni-NWs network is decreased to a relative value of 0.5 at a dose ∼7×10 14 ions cm −2 .…”

Section: Resultsmentioning

confidence: 78%

Modification in properties of Ni-NWs meshes by Ar⁺ ions beam irradiation

Honey

Asim

Ahmad

et al. 2020

Mater. Res. Express

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Influence of 30 kilo-electron-volt (keV) Argon (Ar + ) ions on optical and electrical properties of nickel nanowires (Ni-NWs) meshes is being reported. Ni-NWs are being exposed to 30 keV Argon (Ar + ) ions at various beam fluencies. These fluencies of Ar + ions are 7×10 14 ions cm −2 , 3×10 15 ions cm −2 and 3×10 16 ions cm −2 . After irradiation, Ni-NWs meshes were analyzed through transmission electron microscopy technique (TEM). The structural analysis has been done through X-ray diffraction technique. It is found from TEM results that atoms are sputtered out from surfaces of Ni-NWs due to collision cascade effect persistently and lead to reduce the diameters or thicknesses of Ni-NWs. X-ray diffraction results reveal that crystalline quality is reduced under Ar + ions irradiation which may be due to defects induced in Ni-NWs as a result of collision cascade effect. The Ni-NWs meshes are characterized optically and electrically through UV-VIS spectroscopy and four probe techniques. The optical transparencies of Ni-NWs meshes are increasing with increase in beam fluence of Ar + ions. The electrical conductivity of the mesh is decreased continuously with increment in beam fluence of Ar + ions which might be due to production of defects in Ni-NWs. The tuning of optical transparency and electrical conductivity of Ni-NWs meshes is required for their application as successful transparent electrodes in optoelectronic nanodevices.

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