Structural and Chemical Dynamics of Pyridinic-Nitrogen Defects in Graphene
Structural and Chemical Dynamics of Pyridinic-Nitrogen Defects in Graphene
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DOI：
10.1021/acs.nanolett.5b02831
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发表时间：
2015-11-01
期刊：
影响因子：
10.8
通讯作者：
Suenaga, Kazu
中科院分区：
文献类型：
--
作者：
Lin, Yung-Chang;Teng, Po-Yuan;Suenaga, Kazu
石墨烯的高密度可控氮掺杂是实现高性能石墨烯基器件的关键。在本文中，我们展示了一种有效的方法，选择性地产生石墨-N和吡啶-N缺陷的石墨烯，通过使用臭氧和氮气的混合等离子体。这些氮缺陷的原子结构，电子结构和动力学行为进行了系统的研究，在原子水平上，通过使用扫描透射电子显微镜。吡啶-N表现出更高的化学活性，并且倾向于捕获一系列过渡金属原子（Mg、Al、Ca、Ti、Cr、Mn和Fe）作为单个原子。
High density and controllable nitrogen doping in graphene is a critical issue to realize high performance graphene-based devices. In this paper, we demonstrate an efficient method to selectively produce graphitic-N and pyridinic-N defects in graphene by using the mixture plasma of ozone and nitrogen. The atomic structure, electronic structure, and dynamic behavior of these nitrogen defects are systematically studied at the atomic level by using a scanning transmission electron microscopy. The pyridinic-N exhibits higher chemical activity and tends to trap a series of transition metal atoms (Mg, Al, Ca, Ti, Cr, Mn, and Fe) as individual atoms.