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Open Access Enhanced structural and magnetic properties of carbon-assisted ZnO nanorod arrays on (100) Si substrate

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We have fabricated as-grown ZnO nanorods (NRs) and carbon-assisted NRs arrays on semi-insulating (100)-oriented Si substrates. We compared the structural and magnetic properties of them. HRTEM (High Resolution Transmission Microscopy), Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Energy dispersive X-ray (EDS) revealed that the as-grown ZnO NRs and carbon-assisted ZnO NRs were single crystals with a hexagonal wurtzite structure, and grew with a c-axis orientation perpendicular to the Si substrate. These measurements show that the carbon-assisted ZnO NRs were better synthesized vertically on a Si substrate compared to the as-grown ZnO NRs. Superconducting Quantum Interference Device (SQUID) and X-ray photoelectron spectroscopy (XPS) measurements showed that defect concentration of the carbon-assisted ZnO NRs was remarkably reduced compared to the as-grown ZnO NRs. The reduced defect concentration of the carbon-assisted ZnO demonstrates the possible improvement in the performance of photovoltaic nanodevices based on ZnO like materials. This method can be applied to the fabrication of well-aligned ZnO nanorod used widely in optoelectronic devices.
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Keywords: MAGNETIZATION; POINT DEFECTS; SINGLE CRYSTAL; VAPOR PHASE TRANSPORT; ZNO NANORODS

Document Type: Research Article

Publication date: February 1, 2018

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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