Rights statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2015 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.5b03928
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Organic covalent patterning of nanostructured graphene with selectivity at the atomic level
AU - Navarro, Juan Jesús
AU - Leret, Sofía
AU - Calleja, Fabián
AU - Stradi, Daniele
AU - Black, Andrés
AU - Bernardo-Gavito, Ramón
AU - Garnica, Manuela
AU - Granados, Daniel
AU - Vázquez De Parga, Amadeo L.
AU - Pérez, Emilio M.
AU - Miranda, Rodolfo
N1 - This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2015 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.5b03928
PY - 2016/1/13
Y1 - 2016/1/13
N2 - Organic covalent functionalization of graphene with long-range periodicity is highly desirable-it is anticipated to provide control over its electronic, optical, or magnetic properties-and remarkably challenging. In this work we describe a method for the covalent modification of graphene with strict spatial periodicity at the nanometer scale. The periodic landscape is provided by a single monolayer of graphene grown on Ru(0001) that presents a moiré pattern due to the mismatch between the carbon and ruthenium hexagonal lattices. The moiré contains periodically arranged areas where the graphene-ruthenium interaction is enhanced and shows higher chemical reactivity. This phenomenon is demonstrated by the attachment of cyanomethyl radicals (CH2CN•) produced by homolytic breaking of acetonitrile (CH3CN), which is shown to present a nearly complete selectivity (>98%) binding covalently to graphene on specific atomic sites. This method can be extended to other organic nitriles, paving the way for the attachment of functional molecules.
AB - Organic covalent functionalization of graphene with long-range periodicity is highly desirable-it is anticipated to provide control over its electronic, optical, or magnetic properties-and remarkably challenging. In this work we describe a method for the covalent modification of graphene with strict spatial periodicity at the nanometer scale. The periodic landscape is provided by a single monolayer of graphene grown on Ru(0001) that presents a moiré pattern due to the mismatch between the carbon and ruthenium hexagonal lattices. The moiré contains periodically arranged areas where the graphene-ruthenium interaction is enhanced and shows higher chemical reactivity. This phenomenon is demonstrated by the attachment of cyanomethyl radicals (CH2CN•) produced by homolytic breaking of acetonitrile (CH3CN), which is shown to present a nearly complete selectivity (>98%) binding covalently to graphene on specific atomic sites. This method can be extended to other organic nitriles, paving the way for the attachment of functional molecules.
KW - chemical functionalization
KW - epitaxial graphene
KW - Nanostructured graphene
KW - scanning tunneling microscopy
U2 - 10.1021/acs.nanolett.5b03928
DO - 10.1021/acs.nanolett.5b03928
M3 - Journal article
AN - SCOPUS:84957922225
VL - 16
SP - 355
EP - 361
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 1
ER -