An electron microscope is a microscope that uses a beam of electrons as a source of illumination. They use electron optics that are analogous to the glass lenses of an optical light microscope. As the wavelength of an electron can be up to 100,000 times shorter than that of visible light, electron microscopes have a higher resolution of about 0.1 nm, which compares to about 200 nm for light microscopes. Electron microscope may refer to:
A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that contain information about the surface topography and composition of the sample. The electron beam is scanned in a raster scan pattern, and the position of the beam is combined with the intensity of the detected signal to produce an image. In the most common SEM mode, secondary electrons emitted by atoms excited by the electron beam are detected using a secondary electron detector. The number of secondary electrons that can be detected, and thus the signal intensity, depends, among other things, on specimen topography. Some SEMs can achieve resolutions better than 1 nanometer.
Thomas Eugene Everhart FREng is an American educator and physicist. His area of expertise is the physics of electron beams. Together with Richard F. M. Thornley he designed the Everhart–Thornley detector. These detectors are still in use in scanning electron microscopes, even though the first such detector was made available as early as 1956.
Alec Nigel Broers, Baron Broers, is a British electrical engineer.
Sir Michael Pepper is a British physicist notable for his work in semiconductor nanostructures.
Sir Charles William Oatley OBE, FRS FREng was Professor of Electrical Engineering, University of Cambridge, 1960–1971, and developer of one of the first commercial scanning electron microscopes. He was also a founder member of the Royal Academy of Engineering.
Albert Victor Crewe was a British-born American physicist and inventor of the modern scanning transmission electron microscope capable of taking still and motion pictures of atoms, a technology that provided new insights into atomic interaction and enabled significant advances in and had wide-reaching implications for the biomedical, semiconductor, and computing industries.
Marvin Lou Cohen is an American theoretical physicist. He is a University Professor of Physics at the University of California, Berkeley. Cohen is a leading expert in the field of Condensed Matter Physics. He is highly cited and most widely known for his seminal work on the electronic structure of solids.
The environmental scanning electron microscope (ESEM) is a scanning electron microscope (SEM) that allows for the option of collecting electron micrographs of specimens that are wet, uncoated, or both by allowing for a gaseous environment in the specimen chamber. Although there were earlier successes at viewing wet specimens in internal chambers in modified SEMs, the ESEM with its specialized electron detectors and its differential pumping systems, to allow for the transfer of the electron beam from the high vacuum in the gun area to the high pressure attainable in its specimen chamber, make it a complete and unique instrument designed for the purpose of imaging specimens in their natural state. The instrument was designed originally by Gerasimos Danilatos while working at the University of New South Wales.
Albert Rose was an American physicist, who made major contributions to TV video camera tubes such as the orthicon, image orthicon, and vidicon.
Matthew Linzee Sands was an American physicist and educator best known as a co-author of the Feynman Lectures on Physics. A graduate of Rice University, Sands served with the Naval Ordnance Laboratory and the Manhattan Project's Los Alamos Laboratory during World War II.
Christopher William Baisely "Grig" Grigson was a British naval architect and electronics engineer who is credited with the invention of scanning electron diffraction.
The gaseous detection device (GDD) is a method and apparatus for the detection of signals in the gaseous environment of an environmental scanning electron microscope (ESEM) and all scanned beam type of instruments that allow a minimum gas pressure for the detector to operate.
Chennupati Jagadish, an Indian-Australian physicist and academic, is the President of the Australian Academy of Science, and a Distinguished Professor of Physics at the Australian National University Research School of Physics. He is head of the Semiconductor Optoelectronics and Nanotechnology Group which he established in 1990. He is also the Convener of the Australian Nanotechnology Network and Director of Australian National Fabrication Facility ACT Node.
Peter Duncumb is a British physicist specialising in X-ray microscopy and microanalysis. He is best known for his contribution to the development of the first electron microprobe.
Liquid-phase electron microscopy refers to a class of methods for imaging specimens in liquid with nanometer spatial resolution using electron microscopy. LP-EM overcomes the key limitation of electron microscopy: since the electron optics requires a high vacuum, the sample must be stable in a vacuum environment. Many types of specimens relevant to biology, materials science, chemistry, geology, and physics, however, change their properties when placed in a vacuum.
Gerhard Wilhelm Goetze was a German-born Ph.D. researcher and inventor in atomic physics. He was primarily known for his work on the Moon-to-Earth Apollo TV camera making live broadcast in both brilliant sunlight and pitch darkness possible. Goetze discovered the secondary electron conduction (SEC) effect which amplified light through high-speed electrons deposited in thin film storage targets. The SEC tube was additionally used in ground-based astronomy, inspection of integrated circuits, electron-microscope-based biological tissue study, security, and night vision. Goetze received ten patents for his inventions.
Massood Tabib-Azar is an Iranian-American electrical engineer, researcher and academic. He is a USTAR Professor of Electrical Engineering in the University of Utah and an Editor of IEEE Electron Device Letters.
Avraham (Avi) Gover is an Israeli professor of Electrical Engineering in the Physical Electronics Department of the Engineering Faculty at Tel Aviv University, specializing in Quantum Electronics and FEL Physics. Gover is also the head of the Israeli Center for Radiation Sources and Applications in Ariel. In 2005, he was awarded the international FEL prize "in recognition for his outstanding contributions to Free Electron Laser science and technology".
Raimond Bernard René Castaing, also spelt as Raymond Castaing, was a French solid state physicist and inventor of various materials characterization methods. He was the founder of the French school of microanalysis and is referred to as the father of microanalysis.
