کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6579990 | 1422937 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature growth of single-walled carbon nanotubes with a narrow chirality distribution by tip-growth mode
ترجمه فارسی عنوان
افزایش دمای بالا از نانولوله های کربنی تک محور با توزیع کیرالیتی باریک توسط حالت نوک رشد
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
An MgO supported Co catalyst prepared by atomic layer deposition was applied for the growth of single-walled carbon nanotubes (SWNTs). Different from other catalysts, which generally nucleate SWNTs by base-growth mode, the Co-MgO catalyst uniquely generates SWNTs by tip-growth mode, indicating a weak metal-support interaction. During chemical vapor deposition process, the lift-off of Co nanoparticles from support inhibits the aggregation of Co nanoparticles and favors the synthesis of small-diameter SWNTs with a narrow chirality distribution, even at a high reaction temperature. Particularly, product grown at 800â¯Â°C maintains a preferential synthesis of small-diameter (6, 5) SWNTs. The enrichment of (6, 5) SWNT arises from the combination of SWNT-catalyst interface thermodynamics with growth kinetic. The growth dynamics of SWNTs was further investigated by in situ Raman spectroscopy, which revealed that SWNTs with smaller diameters appeared prior to the growth of large-diameter counterparts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 341, 1 June 2018, Pages 344-350
Journal: Chemical Engineering Journal - Volume 341, 1 June 2018, Pages 344-350
نویسندگان
Maoshuai He, Tao Yang, Danhong Shang, Benwu Xin, Alexander I. Chernov, Elena D. Obraztsova, Jani Sainio, Na Wei, Hongzhi Cui, Hua Jiang, Esko Kauppinen,