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Controlled synthesis and electromagnetic performance of hollow microstructures assembled of tetragonal MnO2 nano-columns
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10.1063/1.4705516
/content/aip/journal/jap/111/8/10.1063/1.4705516
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/8/10.1063/1.4705516

Figures

Image of FIG. 1.
FIG. 1.

XRD patterns of the Fe-doped (a) and undoped (b) MnO2 samples.

Image of FIG. 2.
FIG. 2.

SEM images of the Fe-doped (a), (b), and (c) and undoped (d) and (e) MnO2 samples.

Image of FIG. 3.
FIG. 3.

Schematic illustration of crystal growth of α- and ɛ-MnO2, and the effect of Fe3+ addition on this process.

Image of FIG. 4.
FIG. 4.

XRD patterns of the Fe-doped samples synthesized with different hydrothermal treatment times: 1 h (a), 3 h (b), 6 h (c), and 48 h (d).

Image of FIG. 5.
FIG. 5.

SEM images of the Fe-doped samples synthesized with different hydrothermal treatment times: 1 h (a), 3 h (b), 6 h, (c), and 48 h (d).

Image of FIG. 6.
FIG. 6.

Schematic illustration of formation mechanism of the hollow microstructures assembled of tetragonal MnO2 nanocolumns.

Image of FIG. 7.
FIG. 7.

The complex relative permittivity (a) and permeability (b) of the Fe-doped and undoped MnO2 samples.

Image of FIG. 8.
FIG. 8.

The dielectric loss tangent (a) and magnetic loss tangent (b) of the Fe-doped and undoped MnO2 samples.

Tables

Generic image for table
Table I.

Tunnel size of different crystallographic forms of MnO2.30,31

Generic image for table
Table II.

Crystal radius of the cations.29,32

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/content/aip/journal/jap/111/8/10.1063/1.4705516
2012-04-25
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Controlled synthesis and electromagnetic performance of hollow microstructures assembled of tetragonal MnO2 nano-columns
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/8/10.1063/1.4705516
10.1063/1.4705516
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