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  • Title: Molecular template assisted growth of ultrathin silicon carbide nanowires with strong green light emission and excellent field-emission properties.
    Author: Xi G, He Y, Wang C.
    Journal: Chemistry; 2010 May 03; 16(17):5184-90. PubMed ID: 20309964.
    Abstract:
    A novel molecule template assisted chemical co-reduction method has been successfully developed for the controlled synthesis of ultrathin beta-SiC single-crystalline nanowires on a large scale. The ultrathin beta-SiC single-crystalline nanowires are about 8 nm in diameter and 200-800 nm in length. The resulting thin beta-SiC single-crystalline nanowire is new in the family of beta-SiC one-dimensional (1D) nanostructures. A synergistic action of pi-stacking and steric hindrance result from the 1,10-phenanthroline molecule template are proposed to explain the growth mechanism of the ultrathin beta-SiC single-crystalline nanowires based on the experimental observation. Importantly, such ultrathin beta-SiC nanowire has shown a strong structure-induced enhancement of photoluminescence properties and has exhibited a very strong green light emission, which can be seen by naked eye. Furthermore, the unique beta-SiC ultrathin nanowire structure exhibits a low turn-on field (3.57 V microm(-1)) and a large field-emission current density (20 mA cm(-2)). These results suggest that the ultrathin beta-SiC nanowires can be expected to find promising applications as field emitters and photoelectronic devices.
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