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Optical quenching of coated ZnO nanowires
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10.1063/1.2753717
/content/aip/journal/apl/91/1/10.1063/1.2753717
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/1/10.1063/1.2753717
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Figures

Image of FIG. 1.
FIG. 1.

TEM images of NiO–ZnO core-shell-type nanowire (a) and Ni nanodot on ZnO nanowire (b). Diameter and thickness of ZnO nanowire and NiO layer are 100 and , respectively. Average diameter of Ni nanodot is .

Image of FIG. 2.
FIG. 2.

PL spectra for samples 1, 2, and 3 at . As indicated, four distinct transitions labeled as FX (free exciton), (neutral donor bound exciton), and (neutral acceptor bound exciton) are observed.

Image of FIG. 3.
FIG. 3.

Temperature dependent PL spectra of sample 3 (Ni nanodot coated ZnO nanowire structure). Strong PL intensity quenching arise above . In comparison, the inset shows PL spectra for a ZnO epilayer which show strong luminescence up to room temperature.

Image of FIG. 4.
FIG. 4.

Arrehnius fitting for sample 3. Bound exciton transitions show unusually small activation energies .

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/content/aip/journal/apl/91/1/10.1063/1.2753717
2007-07-02
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optical quenching of NiO∕Ni coated ZnO nanowires
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/1/10.1063/1.2753717
10.1063/1.2753717
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