Dmitri Golberg1,2
Queensland University of Technology (QUT)1,National Institute for Materials Science (NIMS)2
Dmitri Golberg1,2
Queensland University of Technology (QUT)1,National Institute for Materials Science (NIMS)2
Two-dimensional (2D) nanomaterials,<i> i.e.</i> graphenes, boron-nitrines, molybdenum and tungsten disulfides, and MXenes, are studied in a high-resolution transmission electron microscope (HRTEM) equipped with various <i>in situ</i> TEM holders which allow for probing their structural, electrical, mechanical, thermal and optoelectronic properties. Current-voltage characteristics, elasticity, bending and tensile strength, and fracture toughness, photo-current responses and field-emission properties of 2D nanostructures are evaluated during delicate manipulations with them inside the pole piece of the electron microscope using piezo-driven metal probes and/or optical fibers. Performance of diverse nanomaterials as electrodes of Li- and Na-ion-batteries is also evaluated through constructing the prototype <i>in situ</i> electrochemical setups. Electrode swelling, formation of new crystal phases during ion-insertion, and secondary electrolyte layers crystalization during charge-discharge cycles are analyzed. The author is grateful to the Australian Research Council (ARC) for a financial support of the <i>in situ </i>TEM projects in the frame of a Laureate Fellowship FL160100089, a LIEF grant LE190100081 (QUT double-aberration-corrected laser compatible HRTEM) and the projects members - Drs. D.M. Tang, X.L. Wei, M.S. Wang, J. Fernando, K. Firestein and C. Zhang for their key experimental contributions.