Transmission Electron Microscopy: an essential tool to study the physical and chemical properties of nanomaterials

In this seminar, we will start with a short introduction to basic concepts on the operation of a transmission electron microscope. We will describe the wide range of possible analyses to characterize structural, chemical and physical properties through images, diffraction and spectroscopy with atomic or manometric resolution. We will present a series of examples involving the study of nano objects (molecules, nanoparticles, nanotubes, nanowires, etc.) that allow the evaluation of opportunities and limitations, as well as studies on the frontier of knowledge obtained with state-of-the-art instruments and detectors. These examples clearly indicate the need to change our perspective on TEM experiment design, execution and analysis to include simulations, machine learning & big data, with the aim of  deriving quantitative information from measurements. Finally, it is very important to exchange ideas on how to approach the critical problem of human resources formation associated with complex modern analytical techniques. 

 

Sobre o palestrante: Daniel Ugarte is Professor at the Institute of Physics, Univ. Estadual de Campinas (UNICAMP), Brazil. He studied Physics at the National University of Córdoba (Arg.) and obtained his PhD at the Université Paris-Sud. After a postdoc at the Ecole Polytechnique Federale de Lausanne, he joined the Brazilian National Synchrotron Lab in 1993. In 2004, he moved to the Institute of Physics Gleb Wataghin, Univ. Estadual de Campinas (UNICAMP). He spent a sabbatical year at the University of Cambridge in 2014. His activities have been related with the experimental study of structural and electronic properties of nanoscale systems, mainly using electron microscopy methods. He has published about 110 journal papers; his articles have received ~18.000 citations. He has given about 100 invited talks in prestigious international conferences among them APS March Meeting, MRS Fall Meeting, Gordon Conf., etc. He received several national and international awards among them Guggenheim Fellowship (USA, 2002), Latsis (Switzerland, 1994), TWAS Prize in Physics in 2018. He was elected member of the Brazilian Academy of Sciences in 2012 and of The World Academy of Sciences (TWAS) in 2019.