Rights statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright ©2019 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsnano.9b00439
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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 - Graphite and Graphene Fairy Circles
T2 - A Bottom-Up Approach for the Formation of Nanocorrals
AU - Phan, T.H.
AU - Van Gorp, H.
AU - Li, Z.
AU - Trung Huynh, T.M.
AU - Fujita, Y.
AU - Verstraete, L.
AU - Eyley, S.
AU - Thielemans, W.
AU - Uji-I, H.
AU - Hirsch, B.E.
AU - Mertens, S.F.L.
AU - Greenwood, J.
AU - Ivasenko, O.
AU - De Feyter, S.
N1 - This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright ©2019 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsnano.9b00439
PY - 2019/4/23
Y1 - 2019/4/23
N2 - A convenient covalent functionalization approach and nanopatterning method of graphite and graphene is developed. In contrast to expectations, electrochemically activated dediazotization of a mixture of two aryl diazonium compounds in aqueous media leads to a spatially inhomogeneous functionalization of graphitic surfaces, creating covalently modified surfaces with quasi-uniform spaced islands of pristine graphite or graphene, coined nanocorrals. Cyclic voltammetry and chronoamperometry approaches are compared. The average diameter (45-130 nm) and surface density (20-125 corrals/μm 2 ) of these nanocorrals are tunable. These chemically modified nanostructured graphitic (CMNG) surfaces are characterized by atomic force microscopy, scanning tunneling microscopy, Raman spectroscopy and microscopy, and X-ray photoelectron spectroscopy. Mechanisms leading to the formation of these CMNG surfaces are discussed. The potential of these surfaces to investigate supramolecular self-assembly and on-surface reactions under nanoconfinement conditions is demonstrated. © 2019 American Chemical Society.
AB - A convenient covalent functionalization approach and nanopatterning method of graphite and graphene is developed. In contrast to expectations, electrochemically activated dediazotization of a mixture of two aryl diazonium compounds in aqueous media leads to a spatially inhomogeneous functionalization of graphitic surfaces, creating covalently modified surfaces with quasi-uniform spaced islands of pristine graphite or graphene, coined nanocorrals. Cyclic voltammetry and chronoamperometry approaches are compared. The average diameter (45-130 nm) and surface density (20-125 corrals/μm 2 ) of these nanocorrals are tunable. These chemically modified nanostructured graphitic (CMNG) surfaces are characterized by atomic force microscopy, scanning tunneling microscopy, Raman spectroscopy and microscopy, and X-ray photoelectron spectroscopy. Mechanisms leading to the formation of these CMNG surfaces are discussed. The potential of these surfaces to investigate supramolecular self-assembly and on-surface reactions under nanoconfinement conditions is demonstrated. © 2019 American Chemical Society.
KW - chronoamperometry
KW - covalent functionalization
KW - cyclic voltammetry
KW - electrochemical grafting
KW - nanoconfined self-assembly
KW - on-surface polymerization
KW - Atomic force microscopy
KW - Chronoamperometry
KW - Contrast media
KW - Grafting (chemical)
KW - Graphene
KW - Graphite
KW - Scanning tunneling microscopy
KW - Surface reactions
KW - X ray photoelectron spectroscopy
KW - Bottom up approach
KW - Chemically modified
KW - Covalent functionalizations
KW - Electrochemical grafting
KW - Functionalizations
KW - Spatially inhomogeneous
KW - Supramolecular self-assemblies
KW - Surface polymerization
KW - Cyclic voltammetry
U2 - 10.1021/acsnano.9b00439
DO - 10.1021/acsnano.9b00439
M3 - Journal article
VL - 13
SP - 5559
EP - 5571
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 5
ER -