Wojnar, P., Płachta, J., Zaleszczyk, W., Kret, S., Sánchez, Ana M., Rudniewski, R., Raczkowska, K., Szymura, M., Karczewski, G., Baczewski, L. T., Pietruczik, A., Wojtowicz, T. and Kossut, J. (2016) Coexistence of optically active radial and axial CdTe insertions in single ZnTe nanowire. Nanoscale, 8 (10). pp. 5720-5727. doi:10.1039/c5nr08806b

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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.

Item Type:	Journal Article
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Nanoscale
Publisher:	Royal Society of Chemistry
ISSN:	2040-3364
Official Date:	14 March 2016
Dates:	Date Event 14 March 2016 Published 5 February 2016 Available 3 February 2016 Accepted 11 December 2015 Submitted
Volume:	8
Number:	10
Page Range:	pp. 5720-5727
DOI:	10.1039/c5nr08806b
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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