کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1614603 1516339 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Growth and optical properties of a- and c-axis oriented Zn–ZnO nanocables fabricated via a facile one-step process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Growth and optical properties of a- and c-axis oriented Zn–ZnO nanocables fabricated via a facile one-step process
چکیده انگلیسی

This study reports the growth of Zn–ZnO nanocables grown along the [112¯0] (a-plane) and [0 0 0 1] (c-plane) directions. The a-plane-oriented nanocables were synthesized via one-step thermal evaporation and condensation, whereas the highly ordered c-plane-oriented nanocables were synthesized via a vapor–solid–solid growth method with Sn catalysts. Photoluminescence (PL) measurements show that the near-band-edge emissions of both types of Zn–ZnO nanocables are blue-shifted compared to those of ZnO nanotubes without Zn cores, which is caused by compressive stress. Temperature-dependent PL spectra reveal that there are two dominant emissions for each type of nanocables at low temperatures. The emission attributed to excitons bound to neutral donors is common to both types of nanocables and persistent at room temperature. The other emission involves different excitonic transitions, which are related to different surface planes.


► Highly oriented Zn/ZnO core–shell nanocables was successfully fabricated.
► Tin was used as catalyst for the nanocable growth.
► Photoluminescence measurements show blue shift due to stress.
► Temperature-dependent PL spectra reveal that emissions related to the different growth planes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 554, 25 March 2013, Pages 115–121
نویسندگان
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