FWI Institutskolloquium: Analysis of 1D and 2D nanomaterial properties and functions using in situ and operando transmission electron microscopy

Datum

12.06.2023

Zeit

10:00 - 11:00

Sprecher

Dmitri Golberg

Zugehörigkeit

Distinguished Professor, School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Australia and Research Centre for Materials Nanoarchitectonics, National Institute for Materials Science, Japa

Sprache

en

Hauptthema

Materialien

Host

Dr. Arkady Krasheninnikov

Beschreibung

Knowledge of electromechanical, thermal and optoelectronic properties of nanomaterials is of prime importance as far as their integration into modern technologies is concerned. However, typically, such properties are measured using instruments having no direct access to the material atomic structure, its defects and crystallography and spatially resolved chemistry. This drawback largely limits the relevance of data because many structural features of a nanomaterial prior, during and after its testing are hidden. Therefore, the acquired results cannot be linked to a particular material morphology, its atomic structure and defects. This disadvantage confuses engineers and leads to many uncertainties with respect to realistic nanomaterials’ applications and their commercial potential. In this presentation I demonstrate the full usefulness of various state-of-the-art in situ and operando transmission electron microscopy (TEM) techniques for property/function studies of frontier materials, e.g., individual carbon,1 boron nitride and dichalcogenide nanotubes and nanosheets, inorganic nanowires, nanoparticles and nanocomposites. Elasticity, plasticity, fracture strength and toughness, electrical resistivity, thermal gradients, photocurrents,2 photovoltages and spatially resolved luminescence of a nanomaterial may be unambiguously determined inside TEM, while employing piezo-driven probes, sensors and nanomanipulators and/or optical fibers inserted into the TEM column.3 References [1] D.M. Tang, D. Golberg et al., Science 374, 1616 (2021). [2] C. Zhang, D. Golberg et al. Nano Lett. 22, 673 (2022). [3] In situ TEM Project is supported through an Australian Research Council (ARC) Laureate fund FL160100089 (2017-2023). The author is grateful to coauthors at QUT, i.e., Drs. J. Fernando, K. Firestein and C. Zhang, and NIMS, i.e., Drs. D.M. Tang, O. Cretu, M.S. Wang, X.L. Wei, X. Zhou, M. Mitome, N. Kawamoto and Y. Bando, for their key contributions to in situ TEM projects over the years.

Letztmalig verändert: 12.06.2023, 07:37:48