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汕头大学海洋科学接受调剂
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[资源] Acc. Chem. Res.最新综述:纳米石墨烯和石墨烯边缘---电子结构以及纳米制造

最新一期的Acc. Chem. Res.刊发了的题为Nanographene and Graphene Edges: Electronic Structure and Nanofabrication的研究性综述,主要讲述了石墨烯纳米化(纳米石墨烯)以及石墨烯边缘导致的电子结构、性质的变化,并介绍了该领域的相关合成工作。文章9页,引文46篇。
Graphene can be referred to as an infinite polycyclic aromatic hydrocarbon (PAH) consisting of an infinite number of benzene rings fused together. However, at the nanoscale, nanographene’s properties lie in between those of bulk graphene and large PAH molecules, and its electronic properties depend on the influence of the edges, which disrupt the infinite π-electron system. The resulting modulation of the electronic states depends on whether the nanographene edge is the armchair or zigzag type, corresponding to the two fundamental crystal axes. In this Account, we report the results of fabricating both types of edges in the nanographene system and characterizing their electronic properties using a scanning probe microscope.

We first introduce the theoretical background to understand the two types of finite size effects on the electronic states of nanographene (i) the standing wave state and (ii) the edge state which correspond to the armchair and zigzag edges, respectively. Most importantly, characterizing the standing wave and edge states could play a crucial role in understanding the chemical reactivity, thermodynamic stability and magnetism of nanosized graphene—important knowledge in the design and realization of promising functionalized nanocarbon materials.

In the second part, we present scanning probe microscopic characterization of both edge types to experimentally characterize the two electronic states. As predicted, we find the armchair-edged nanographene to have an energetically stable electronic pattern. The zigzag-edged nanographene shows a nonbonding (π radical) pattern, which is the source of the material’s electronic and magnetic properties and its chemical activity. Precise control of the edge geometry is a practical requirement to control the electronic structure. We show that we can fabricate the energetically unstable zigzag edges using scanning probe manipulation techniques, and we discuss challenges in using these techniques for that purpose.
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  • 附件 1 : NanographeneandGrapheneEdges:ElectronicStructureandNanofabrication.pdf
  • 2012-11-22 09:19:31, 4.27 M

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电化学-电池材料 石墨烯知识汇总 锂电资源共享 英文文献或者教材
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康康310

铁杆木虫 (著名写手)


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楼主辛苦啦
7楼2012-11-22 12:16:58
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小鸟蘑菇

木虫 (小有名气)


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石墨烯的边缘结构对其性质的影响很大,正需要了解这方面的内容。
希望楼主给推荐些关于石墨烯及其先关材料的功能化方面的文献啊。

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3楼2012-11-22 10:23:55
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小鸟蘑菇

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引用回帖:
3楼: Originally posted by 小鸟蘑菇 at 2012-11-22 10:23:55
石墨烯的边缘结构对其性质的影响很大,正需要了解这方面的内容。
希望楼主给推荐些关于石墨烯及其先关材料的功能化方面的文献啊。

另,收听一下楼主,胜读十天书
4楼2012-11-22 10:26:12
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wyy216882楼
2012-11-22 10:03   回复  
五星好评  顶一下,感谢分享!
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2012-11-22 10:46   回复  
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2012-11-22 14:14   回复  
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2012-11-22 14:21   回复  
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