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Hydrogen-Assisted Synthesis and Optical Properties of Single-Crystalline Cd0.9Mn0.1S Nanobelts

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High quality Cd0.9Mn0.1S nanobelts have been synthesized using a one-step thermal evaporation method in large scale. Their morphology and microstructures were determined by X-ray powder diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, Raman spectroscopy and photoluminescence spectroscopy. The observations revealed that the as-synthesized Cd0.9Mn0.1S nanobelts were high quality single crystalline with hexagonal wurtzite structure. The nanobelts grew along [0 −1 1 0] direction with side surfaces of ± (0 0 0 1) and top surfaces of ± (2 1 1 0). The nanobelts can range in length from several tens to a hundred microns, in thickness about 50 nm and in tapered width 50 to 300 nm. A hydrogen-assisted vapor-liquid-solid (VLS) combined with vapor-solid (VS) formation mechanism is also proposed to interpret the growth of Cd0.9Mn0.1S nanobelts in our work. The room-temperature photoluminescence spectrum of Cd0.9Mn0.1S nanobelts featured two luminescence peaks around 515 and 596 nm, which could be attributed to surface state emission and Mn2+ ion intra-3d (4T16A1) transition, respectively.
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Document Type: Research Article

Publication date: 2008-08-01

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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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