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Issue 10, 2016
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Coexistence of optically active radial and axial CdTe insertions in single ZnTe nanowire

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Abstract

We report on the growth, cathodoluminescence and micro-photoluminescence of individual radial and axial CdTe insertions in ZnTe nanowires. In particular, the cathodoluminescence technique is used to determine the position of each emitting object inside the nanowire. It is demonstrated that depending on the CdTe deposition temperature, one can obtain an emission either from axial CdTe insertions only, or from both, radial and axial heterostructures, simultaneously. At 350 °C CdTe grows only axially, whereas at 310 °C and 290 °C, there is also significant deposition on the nanowire sidewalls resulting in radial core/shell heterostructures. The presence of Cd atoms on the sidewalls is confirmed by energy dispersive X-ray spectroscopy. Micro-photoluminescence study reveals a strong linear polarization of the emission from both types of heterostructures in the direction along the nanowire axis.

Graphical abstract: Coexistence of optically active radial and axial CdTe insertions in single ZnTe nanowire

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Publication details

The article was received on 11 Dec 2015, accepted on 03 Feb 2016 and first published on 05 Feb 2016


Article type: Paper
DOI: 10.1039/C5NR08806B
Citation: Nanoscale, 2016,8, 5720-5727
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    Coexistence of optically active radial and axial CdTe insertions in single ZnTe nanowire

    P. Wojnar, J. Płachta, W. Zaleszczyk, S. Kret, A. M. Sanchez, R. Rudniewski, K. Raczkowska, M. Szymura, G. Karczewski, L. T. Baczewski, A. Pietruczik, T. Wojtowicz and J. Kossut, Nanoscale, 2016, 8, 5720
    DOI: 10.1039/C5NR08806B

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