Controlling Hydrogenation of Graphene on Ir(111)

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• 作者：Richard Balog ; Mie Andersen ; Bjarke J酶rgensen ; Zeljko Sljivancanin ; Bj酶rk Hammer ; Alessandro Baraldi ; Rosanna Larciprete ; Philip Hofmann ; Liv Hornek忙r ; Silvano Lizzit
• 刊名：ACS Nano
• 出版年：2013
• 出版时间：May 28, 2013
• 年：2013
• 卷：7
• 期：5
• 页码：3823-3832
• 全文大小：1131K
• 年卷期：v.7,no.5(May 28, 2013)
• ISSN：1936-086X

文摘

Combined fast X-ray photoelectron spectroscopy and density functional theory calculations reveal the presence of two types of hydrogen adsorbate structures at the graphene/Ir(111) interface, namely, graphane-like islands and hydrogen dimer structures. While the former give rise to a periodic pattern, dimers tend to destroy the periodicity. Our data reveal distinctive growth rates and stability of both types of structures, thereby allowing one to obtain well-defined patterns of hydrogen clusters. The ability to control and manipulate the formation and size of hydrogen structures on graphene facilitates tailoring of its properties for a wide range of applications by means of covalent functionalization.

Keywords:

graphene; Ir(111); hydrogen; XPS; DFT