Journal Article

Periodic surface functional group density on graphene via laser-induced substrate patterning at Si/SiO2 interface

Kovaříček, Petr, Drogowska-Horna, Karolina A., Sládek, Juraj, Račiukaitis, Gediminas, Bulgakova, Nadezhda M., Kalbáč, Martin, Derrien, Thibault J.-Y., Mirza, Inam, Rodriguez, Alvaro, Gedvilas, Mindaugas, Frank, Otakar

2020

Overview

Controlling the spatial distribution of functional groups on 2D materials on a micrometer scale and below represents a fascinating opportunity to achieve anisotropic (opto)electronic properties of these materials. Periodic patterns of covalent functionalization can lead to periodic potentials in the monolayer; however, creating such superstructures is very challenging. Here, we describe an original approach to the periodic functionalization of graphene induced by substrate patterning using a pulsed laser. Laser-induced periodic surface structures (LIPSS) are produced on silicon wafers with thermally-grown oxide layers. The irradiation conditions for the formation of LIPSS confined at the SiO 2 /Si interface have been unravelled. LIPSS imprint their periodicity to the reactivity of the monolayer graphene placed on the substrate via modulation of its local doping level. This method is clean, straightforward and scalable with high spatial resolution.

• Publisher: Tsinghua University Press
• Subject: Atomic/Molecular Structure and Spectra / Biomedicine / Biotechnology / Chemistry and Materials Science / Condensed Matter Physics / Functional groups / Graphene / Irradiation / Lasers / Materials Science / Monolayers / Nanotechnology / Periodicity / Pulsed lasers / Research Article / Silicon dioxide / Silicon substrates / Silicon wafers / Spatial discrimination / Spatial distribution / Spatial resolution / Superstructures / Two dimensional materials