title: Graphene wrinkling induced by monodisperse nanoparticles: facile control and quantification.
abstract: Controlled wrinkling of single-layer graphene (1-LG) at nanometer scale was achieved by introducing monodisperse nanoparticles (NPs), with size comparable to the strain coherence length, underneath the 1-LG. Typical fingerprint of the delaminated fraction is identified as substantial contribution to the principal Raman modes of the 1-LG (G and G'). Correlation analysis of the Raman shift of the G and G' modes clearly resolved the 1-LG in contact and delaminated from the substrate, respectively. Intensity of Raman features of the delaminated 1-LG increases linearly with the amount of the wrinkles, as determined by advanced processing of atomic force microscopy data. Our study thus offers universal approach for both fine tuning and facile quantification of the graphene topography up to ~60% of wrinkling.
authors.affiliation: Institute of Physics CAS, v.v.i., Department of Magnetic Nanosystems, Na Slovance 2, 18221 Prague 2, Czech Republic.
authors.forename: Jana
authors.initials: J
authors.lastname: Vejpravova
authors.affiliation: Institute of Physics CAS, v.v.i., Department of Magnetic Nanosystems, Na Slovance 2, 18221 Prague 2, Czech Republic.
authors.forename: Barbara
authors.initials: B
authors.lastname: Pacakova
authors.affiliation: Charles Univeristy in Prague, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Ke Karlovu 5, 12116 Prague 2, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Endres
authors.affiliation: Institute of Physics CAS, v.v.i., Department of Magnetic Nanosystems, Na Slovance 2, 18221 Prague 2, Czech Republic.
authors.forename: Alice
authors.initials: A
authors.lastname: Mantlikova
authors.affiliation: Institute of Physics CAS, v.v.i., Department of Magnetic Nanosystems, Na Slovance 2, 18221 Prague 2, Czech Republic.
authors.forename: Tim
authors.initials: T
authors.lastname: Verhagen
authors.affiliation: JH Institute of Physical Chemistry CAS, v.v.i., Dolejskova 3, 18200 Prague 8, Czech Republic.
authors.forename: Vaclav
authors.initials: V
authors.lastname: Vales
authors.affiliation: JH Institute of Physical Chemistry CAS, v.v.i., Dolejskova 3, 18200 Prague 8, Czech Republic.
authors.forename: Otakar
authors.initials: O
authors.lastname: Frank
authors.affiliation: JH Institute of Physical Chemistry CAS, v.v.i., Dolejskova 3, 18200 Prague 8, Czech Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Kalbac