Onion-like carbon nanoparticles generated by multiple laser irradiations on laser-ablated particles
Onion-like carbon nanoparticles generated by multiple laser irradiations on laser-ablated particles
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DOI：
10.1016/j.carbon.2011.10.024
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发表时间：
2012-03
期刊：
影响因子：
10.9
通讯作者：
Ayumi Inoue;T. Seto;Y. Otani
中科院分区：
文献类型：
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作者：
Ayumi Inoue;T. Seto;Y. Otani
开发了一种在室温、大气压下合成洋葱状碳纳米粒子的一步法。对限制在碳靶棒空腔中的碳纳米颗粒进行周期性脉冲激光照射，会引起其结构发生巨大变化，将其从无定形转变为有序的同心石墨壳。通过扫描迁移率粒度仪测量的气载纳米粒子的尺寸分布显示，由于碳团聚体的重组，平均迁移率直径从 83 nm 降至 18 nm。通过透射电子显微镜观察到由多个石墨烯片组成的具有壳结构的多面体和未团聚的纳米颗粒。
A one-step process to synthesize onion-like carbon nanoparticles at room temperature under atmospheric pressure was developed. Periodic pulsed laser irradiation of carbon nanoparticles confined in the cavity of a carbon target rod induces drastic changes to their structure, changing them from amorphous to ordered concentric graphitic shells. The size distribution of gas-borne nanoparticles measured by a scanning mobility particle sizer showed the mean mobility diameter decreased from 83nm to 18nm as a result of restructuring of carbon agglomerates. Polyhedral and unagglomerated nanoparticles with shell structures composed of multiple graphene sheets were observed by a transmission electron microscopy.