This book focuses on in-situ transmission electron microscopy (TEM), an investigatory technique used to observe a sample’s response to a given stimulus (including electron irradiation, thermal excitation, mechanical force, optical excitation, electric and magnetic fields) at the nanoscale in real time. The book introduces readers to the technical strategy behind the in-situ technique and its developments. It reviews the research frontiers of using in-situ TEM in energy conversion and storage, catalysis, nanomaterials synthesis, nanoelectronics, etc. Furthermore, it discusses the future...