Jani Kotakoski

TL;DR: Grain boundary migration in polycrystalline graphene is investigated in an aberration-corrected transmission electron microscope, exploiting the energy of the imaging electrons to stimulate individual bond rotations in the GB core region, revealing configurational fluctuations that take on a time-averaged preferential direction only in the presence of significant boundary curvature.

TL;DR: Numerical simulations and transport measurements are used to demonstrate that electrical properties and chemical modification of graphene grain boundaries are strongly correlated, which provides guidelines for the improvement of graphene devices and opens a new research area of engineering graphenegrain boundaries for highly sensitive electro-biochemical devices.

TL;DR: It is shown how momentum transfer from the electrons of a 60-keV Ångström-sized STEM probe can be used to move silicon atoms embedded in the graphene lattice with atomic precision.

TL;DR: In this paper, a 1g and a 1 g Raman active modes were identified using polarization measurements in the Raman setup, showing a clear position and intensity dependence with film thickness for multiple excitation wavelengths.

TL;DR: A kinetic Monte Carlo code is developed for modeling morphological changes in a graphene monolayer under irradiation at macroscopic time scales and can be used for the optimization of graphene cutting and patterning with focused ion beams.