What is Transmission Electron Microscopy (TEM)?

Transmission Electron Microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through an ultra-thin specimen, interacting with the specimen as it passes through. An image is formed from the electrons transmitted through the specimen, magnified and focused onto an imaging device, such as a fluorescent screen, photographic film, or a sensor such as a CCD camera. TEM is used in materials science, biology, nanotechnology, and other fields for high-resolution imaging and analysis of the internal structure of materials and biological samples.