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1 article(s) from Klepka, Marcin T.

Paramagnetism of cobalt-doped ZnO nanoparticles obtained by microwave solvothermal synthesis

Jacek Wojnarowicz,
Sylwia Kusnieruk,
Tadeusz Chudoba,
Stanislaw Gierlotka,
Witold Lojkowski,
Wojciech Knoff,
Malgorzata I. Lukasiewicz,
Bartlomiej S. Witkowski,
Anna Wolska,
Marcin T. Klepka,
Tomasz Story and
Marek Godlewski

Beilstein J. Nanotechnol. 2015, 6, 1957–1969, doi:10.3762/bjnano.6.200

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Figure 1: SEM images of ZnO nanopowders in their as-produced (before annealing) state: (a) undoped, (b) doped...

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Figure 2: SEM images of annealed ZnO nanopowders after annealing at 800 °C in nitrogen: (a) undoped, (b) dope...

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Figure 3: SEM images of annealed ZnO nanopowders after annealing at 800 °C in synthetic air: (a) undoped, (b)...

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Figure 4: Dependence between the nominal and experimental Co doping concentration for the samples before anne...

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Figure 5: (a) Photographs of the Zn₁₋_xCo_xO precursor in ethylene glycol where the color varies with the compo...

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Figure 6: XRD patterns for Zn₁₋_xCo_xO nanopowders before annealing, with a nominal Co content in solution of 0...

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Figure 7: XRD patterns for Zn₁₋_xCo_xO nanopowders after annealing at 800 °C in nitrogen. The metallic α-Co pha...

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Figure 8: XRD patterns for Zn₁₋_xCo_xO nanopowders after annealing at 800 °C in synthetic air. The Co₃O₄ phase ...

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Figure 9: Dependence of the a and c lattice parameter on nominal Co content, in mol % for: (a) preannealed sa...

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Figure 10: Fourier transformations of EXAFS oscillations at the Zn K-edge for the as-synthesized NP samples.

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Figure 11: Comparison of the Fourier transformations of EXAFS oscillations measured at the Co K-edge for Zn₁₋_x...

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Figure 12: The magnetization dependence on the external magnetic field: (a) for as-synthesized Zn₁₋_xCo_xO NPs w...

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Figure 13: Magnetic susceptibility dependence on temperature for Zn_0.85Co_0.15O powder: (a) as-synthesized, b) ...

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Full Research Paper

Published 30 Sep 2015

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