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3 article(s) from Wojnarowicz, Jacek

Influence of hydrothermal synthesis parameters on the properties of hydroxyapatite nanoparticles

Sylwia Kuśnieruk,
Jacek Wojnarowicz,
Agnieszka Chodara,
Tadeusz Chudoba,
Stanislaw Gierlotka and
Witold Lojkowski

Beilstein J. Nanotechnol. 2016, 7, 1586–1601, doi:10.3762/bjnano.7.153

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Figure 1: The MSS2 reactor [36]: a) general draft of the MSS2 reactor; b) view of the prototype; c) principle of ...

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Figure 2: XRD patterns of HAp powders.

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Figure 3: XRD patterns of a duck bone, a beef bone, a pork bone, a turkey bone, a horse bone, a rabbit bone, ...

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Figure 4: Crystallite size distribution, obtained using Nanopowder XRD Processor Demo [48]: a) HAp Type 1; b) HAp...

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Figure 5: SEM micrographs of HAp powders: (a, b) Type 1; (c, d) Type 2; (e, f) Type 3; (g, h) Type 4; (i, j) ...

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Figure 6: The bright field TEM image of Type 1 HAp.

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Figure 7: a) A dark field TEM image of Type 2 HAp; b) a histogram of the particle size distribution.

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Figure 8: a) A dark field TEM image of Type 3 HAp; b) a histogram of the particle size distribution.

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Figure 9: a) A dark field TEM image of Type 4 HAp; b) a histogram of the particle size distribution.

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Figure 10: a) A dark field TEM image of Type 5 HAp; b) a histogram of the particle size distribution.

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Figure 11: a) A dark field TEM image of Type 6 HAp; b) a histogram of the particle size distribution.

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Figure 12: Results of thermogravimetric analysis for Type 1–Type 6 HAp nanopowder heated in helium atmosphere ...

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Full Research Paper

Published 04 Nov 2016

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Microwave solvothermal synthesis and characterization of manganese-doped ZnO nanoparticles

Jacek Wojnarowicz,
Roman Mukhovskyi,
Elzbieta Pietrzykowska,
Sylwia Kusnieruk,
Jan Mizeracki and
Witold Lojkowski

Beilstein J. Nanotechnol. 2016, 7, 721–732, doi:10.3762/bjnano.7.64

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Figure 1: The number of scientific publications referring to the search of “doped ZnO” and “Mn doped ZnO” phr...

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Figure 2: Indicative examples of the possible distribution of Mn²⁺ dopant in zinc oxide crystalline lattice. ...

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Figure 3: SEM images of NPs of Zn₁₋_xMn_xO with dopant concentrations of: a) 0 mol %, b) 1 mol %, c) 5 mol %, d...

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Figure 4: SEM images of agglomerates and conglomerates of Zn₁₋_xMn_xO NPs with dopant concentrations of: a) 0 m...

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Figure 5: XRD diffraction patterns of Zn₁₋_xMn_xO NPs, with the nominal dopant content in the solution being 0,...

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Figure 6: Lattice parameters versus nominal Mn²⁺ content of Zn₁₋_xMn_xO samples.

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Figure 7: Dependence of the changes in crystallite size on the nominal content of Mn²⁺-dopant in Zn₁₋_xMn_xO.

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Figure 8: Correlation between the nominal content and the real content of Mn²⁺ dopant in ZnO. The results wer...

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Figure 9: Visual comparison of changes in colours of suspensions of Zn₁₋_xMn_xO NPs depending on the dopant con...

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Figure 10: Visual comparison of changes in colours of dry powder of Zn₁₋_xMn_xO NPs depending on the dopant cont...

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Figure 11: Crystallite size distribution obtained using Nanopowder XRD Processor Demo [68].

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Full Research Paper

Published 19 May 2016

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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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