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Square ice in graphene nanocapillaries
G. Algara-Siller, O. Lehtinen, F. C. Wang +5
Adsorbed layers of water are ubiquitously present at surfaces and fill in microscopic pores, playing a central role in many phenomena in such diverse fields as materials science, g…
Implantation and atomic scale investigation of self-interstitials in graphene
Ossi Lehtinen, Nilesh Vats, Gerardo Algara-Siller +2
Crystallographic defects play a key role in determining the properties of crystalline materials. The new class of two-dimensional materials, foremost graphene, have enabled atomica…
Numerical correction of anti-symmetric aberrations in single HRTEM images of weakly scattering 2D-objects
Ossi Lehtinen, Dorin Geiger, Zhongbo Lee +4
Here, we present a numerical post-processing method for removing the effect of anti-symmetric residual aberrations in high-resolution transmission electron microscopy (HRTEM) image…
Non-invasive transmission electron microscopy of vacancy defects in graphene produced by ion irradiation
Ossi Lehtinen, I-Ling Tsai, Rashid Jalil +4
Irradiation with high-energy ions has been widely suggested as a tool to engineer properties of graphene. Experiments show that it indeed has a strong effect on its transport, magn…