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hsk_hunter

铁杆木虫 (正式写手)


[资源] 分享一篇最新的Science上关于氮掺杂单层石墨烯的文章

题目:Visualizing Individual Nitrogen Dopants in Monolayer Graphene
摘要:
In monolayer graphene, substitutional doping during growth can be used to alter its electronic properties. We used scanning tunneling microscopy, Raman spectroscopy, x-ray spectroscopy, and first principles calculations to characterize individual nitrogen dopants in monolayer graphene grown on a copper substrate. Individual nitrogen atoms were incorporated as graphitic dopants, and a fraction of the extra electron on each nitrogen atom was delocalized into the graphene lattice. The electronic structure of nitrogen-doped graphene was strongly modified only within a few lattice spacings of the site of the nitrogen dopant. These findings show that chemical doping is a promising route to achieving high-quality graphene films with a large carrier concentration.
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xinghang1999

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12楼2011-08-24 09:29:35
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