ZnO–Sn:ZnO Core–Shell Nanowires and ZnO–Zn2SnO4 Comb-Like Nanocomposites

Authors: Wang, Ruey-Chi; Hung, Jian-Shiung

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 9, September 2010 , pp. 5634-5640(7)

Publisher: American Scientific Publishers

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Abstract:

Novel single-crystalline ZnO–Sn:ZnO (SZO) core–shell nanowires and ZnO–Zn2SnO4 (ZTO) comblike nanocomposites were synthesized by thermal chemical vapor deposition at a low temperature of 650 °C. Scanning electron microscopy and transmission electron microscopy show the diameters and lengths of the core–shell nanowires are in ranges of 25∼60 nm and 300∼500 nm, respectively. The atomic ratios of Sn to (Zn+Sn) in the central and shell parts of the nanowire are 0.4 at.% and 6.1 at.%, respectively. The ZnO–ZTO comb-like nanocomposites possess ZnO nanocombs with ZTO nano-layers deposited on both sides of them. The ZnO branches and ZTO layers are single-crystalline wurtzite and spinel structures growing along the [0002] and [111] directions, respectively. Room-temperature cathodoluminescence measurements show the nanocomposites exhibit strong ultraviolet (UV) emissions at 300, 384 nm, and a broad green emission. The novel luminescence shows promising singularity for opto-electronic applications.

Keywords: HETEROSTRUCTURE; NANOCOMPOSITES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2471

Publication date: September 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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