کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5364805 | 1388320 | 2010 | 9 صفحه PDF | دانلود رایگان |
The synthesis of single-walled carbon nanotubes (SWCNTs) on a transparent substrate with multiple-catalyst layer (Fe/Al/Cr: 0.5/15/500Â nm) using laser-induced chemical vapor deposition is reported. Ethylene (C2H4) mixed with hydrogen (H2) and a continuous wave Nd:YVO4 laser (532Â nm) were used as the precursor gas and the irradiation source, respectively. It was found that the density and quality of the SWCNT dots varied sensitively to laser irradiance and chamber pressure. From subsequent micro-Raman analyses at different excitation sources (488, 514, 633, and 785Â nm), the diameters of the SWCNTs were estimated to be within the range of 0.8-2Â nm and that the SWCNT dots were composed of both semiconducting and metallic SWCNTs. It is demonstrated that an array of SWCNT dots can be fabricated at precisely controlled positions of a transparent substrate at room temperature with no need of catalysis patterning.
Journal: Applied Surface Science - Volume 257, Issue 2, 1 November 2010, Pages 641-649