10.1021/nl900811r.s001 Leonardo C. Campos Leonardo C. Campos Vitor R. Manfrinato Vitor R. Manfrinato Javier D. Sanchez-Yamagishi Javier D. Sanchez-Yamagishi Jing Kong Jing Kong Pablo Jarillo-Herrero Pablo Jarillo-Herrero Anisotropic Etching and Nanoribbon Formation in Single-Layer Graphene American Chemical Society 2009 measurements show Anisotropic Etching technique graphene nanostructures Raman spectroscopy nickel nanoparticles graphene nanocircuits anisotropic etching Nanoribbon Formation etching conditions 2009-07-08 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Anisotropic_Etching_and_Nanoribbon_Formation_in_Single_Layer_Graphene/2844964 We demonstrate anisotropic etching of single-layer graphene by thermally activated nickel nanoparticles. Using this technique, we obtain sub-10-nm nanoribbons and other graphene nanostructures with edges aligned along a single crystallographic direction. We observe a new catalytic channeling behavior, whereby etched cuts do not intersect, resulting in continuously connected geometries. Raman spectroscopy and electronic measurements show that the quality of the graphene is resilient under the etching conditions, indicating that this method may serve as a powerful technique to produce graphene nanocircuits with well-defined crystallographic edges.