Abstract
Assited by Co as catalyst, an interesting structure, dandelion-shaped SiCN rods, was synthesized using microwave plasma chemical vapor deposition method with gas mixtures of CH <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> , H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> and N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> as precursors and Si chips inserted in the sample holder at symmetrical positions around the specimen as additional Si sources. Scanning electron microscopy shows each rod has not only a column about 0.4~0.8 mum in diameter and about 10~20 mum in length, but also a ~2 mum sized ball-like tip, from which nanowiskers of 0.3 mum long with 20~30 nm in diameter were formed. The samples are atomic-level hybrids composed of Si, C and N atoms. Two strong peaks (3.25 and 2.84 eV) were observed from photoluminescence spectroscopy at room temperature, indicating the dandelion-shaped SiCN rods have potential application in optoelectronic devices.
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