Shedding Light on the Crystallographic Etching of Multi-Layer Graphene at the Atomic Scale

作     者：Franziska Schäffel Jamie H.Warner Alicja Bachmatiuk Bernd Rellinghaus Bernd Büchner Ludwig Schultz Mark H.Rümmeli 

作者机构：IFW DresdenP.O.Box 270116D-01171 DresdenGermany Department of MaterialsUniversity of OxfordParks Rd.Oxford OX13PHUnited Kingdom 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2009年第2卷第9期

页      面：695-705页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Cusanuswerk Glasstone Fund Brasenose College DFG [RU1540/4-1] 

主　　题：Graphene graphene nanoribbons catalytic hydrogenation nanoparticles 

摘      要：The controlled etching of graphite and graphene by catalytic hydrogenation is potentially a key engineering route for the fabrication of graphene nanoribbons with atomic *** hydrogenation mechanism,though,remains poorly *** this study we exploit the benefi ts of aberration-corrected high-resolution transmission electron microscopy to gain insight to the hydrogenation *** etch tracks are found to be commensurate with the graphite *** particles at the head of an etch channel are shown to be faceted and the angles between facets are multiples of 30°.Thus,the angles between facets are also commensurate with the graphite *** addition,the results of a post-annealing step suggest that all catalyst particles even if they are not involved in etching are actively forming methane during the hydrogenation ***,the data point against carbon dissolution being a key mechanism during the hydrogenation process.