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Direct imaging of construction of carbon onions by curling few-layer graphene flakes
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1039/c7cp07063b Meifen Li 1, 2, 3, 4 , Weiwei Liu 1, 2, 3, 4 , Haixia Zhang 4, 5, 6, 7 , Zhilu Liang 4, 5, 6, 7 , Pei Duan 4, 5, 6, 7 , Xiaoli Yan 4, 5, 6, 7 , Pengfei Guan 1, 2, 3, 4 , Bingshe Xu 4, 5, 6, 7 , Junjie Guo 4, 5, 6, 7
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1039/c7cp07063b Meifen Li 1, 2, 3, 4 , Weiwei Liu 1, 2, 3, 4 , Haixia Zhang 4, 5, 6, 7 , Zhilu Liang 4, 5, 6, 7 , Pei Duan 4, 5, 6, 7 , Xiaoli Yan 4, 5, 6, 7 , Pengfei Guan 1, 2, 3, 4 , Bingshe Xu 4, 5, 6, 7 , Junjie Guo 4, 5, 6, 7
Affiliation
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The violent reaction processing and required high-temperature environment involved in growing carbon onions make it difficult to obtain an insight into their evolution mechanism. By using deionized water as the medium of arc discharge, we successfully froze the synthetic reaction at intermediary stages and observed detailed structures of the obtained intermediates of carbon onions. Here we present the atomic-scale scanning transmission electron microscopy investigation of carbon onions produced by arc discharge in water. We directly observed that carbon onions at intermediary growth stage are characterized by unclosed few-layer graphene shells. Meanwhile, a kind of graphene flakes composed of 3 layers or less were also observed in the sample. The kindred evolution linkage was induced to exist among these few-layer graphene flakes and carbon onions in the arc discharge synthetic process. On the basis of microscopy observations, we propose that carbon onions are constructed by curling few-layer graphene flakes, which is beneficial for structural designs and controls of related carbon materials used in different fields.
中文翻译：
通过卷曲几层石墨烯薄片直接成像碳洋葱的结构
生长碳洋葱所涉及的剧烈反应过程和所需的高温环境使得难以深入了解其演化机理。通过使用去离子水作为电弧放电的媒介，我们成功地在中间阶段冻结了合成反应，并观察到了碳洋葱中间体的详细结构。在这里，我们介绍由电弧放电在水中产生的碳洋葱的原子级扫描透射电子显微镜研究。我们直接观察到，在中间生长阶段，碳洋葱的特征是未封闭的几层石墨烯壳。同时，在样品中还观察到了一种由三层或更少层组成的石墨烯薄片。在电弧放电合成过程中，诱导了这些稀疏层的石墨烯薄片和碳洋葱之间存在着亲缘的进化联系。在显微镜观察的基础上，我们建议通过卷曲几层石墨烯薄片来构造碳洋葱，这有利于不同领域中使用的相关碳材料的结构设计和控制。
更新日期：2017-12-19
中文翻译：
通过卷曲几层石墨烯薄片直接成像碳洋葱的结构
生长碳洋葱所涉及的剧烈反应过程和所需的高温环境使得难以深入了解其演化机理。通过使用去离子水作为电弧放电的媒介，我们成功地在中间阶段冻结了合成反应，并观察到了碳洋葱中间体的详细结构。在这里，我们介绍由电弧放电在水中产生的碳洋葱的原子级扫描透射电子显微镜研究。我们直接观察到，在中间生长阶段，碳洋葱的特征是未封闭的几层石墨烯壳。同时，在样品中还观察到了一种由三层或更少层组成的石墨烯薄片。在电弧放电合成过程中，诱导了这些稀疏层的石墨烯薄片和碳洋葱之间存在着亲缘的进化联系。在显微镜观察的基础上，我们建议通过卷曲几层石墨烯薄片来构造碳洋葱，这有利于不同领域中使用的相关碳材料的结构设计和控制。
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