electron barrier

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• Electron beam physical vapor deposition — or EBPVD is a form of physical vapor deposition in which a target anode is bombarded with an electron beam given off by a charged tungsten filament under high vacuum. The electron beam causes atoms from the target to transform into the gaseous… …   Wikipedia

• Electron irradiation — is a process which involves using electrons, usually of high energy, to treat an object for a variety of purposes. This may take place under elevated temperatures and nitrogen atmosphere. Possible uses for electron irradiation include… …   Wikipedia

• electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube …   Universalium

• Electron bubble — An electron bubble is the empty space created around a free electron in a cryogenic gas or liquid, such as neon or helium. They are typically very small, about 2 nm in diameter at atmospheric pressure.Electron bubbles in heliumAt room temperature …   Wikipedia

• Barrier (pharmaceutical) — Isolators (a.k.a. Barrier Isolators) are devices that provide a physical barrier between the laboratory technician and the work process. They are routinely found within the pharmaceutical industry, and with the recent implementation of USP797,… …   Wikipedia

• Field electron emission — It is requested that a diagram or diagrams be included in this article to improve its quality. For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images. Field emission (FE) (also known as field… …   Wikipedia

• Schottky barrier — A Schottky barrier is a potential barrier formed at a metal semiconductor junction which has rectifying characteristics, suitable for use as a diode. The largest differences between a Schottky barrier and a p n junction are its typically lower… …   Wikipedia

• Proton-coupled electron transfer — (PCET) is a reaction mechanism that is thought to be common in redox reactions. It involves the concerted transfer of an electron and proton to or from a substrate.[1][2] In PCET, the proton and the electron (i) start from different orbitals and… …   Wikipedia

• Proton coupled electron transfer — (PCET) is an electrochemical reaction mechanism in which an electron and proton is simultaneously moved in a concerted mechanism. [Huynh, M. H.; Meyer, T. Chem. Rev. 2007, 107 , 5004 5064.] Mechanism Proton coupled electron transfer (PCET) is… …   Wikipedia

• Blood-brain barrier — The blood brain barrier (BBB) is a metabolic or cellular structure in the central nervous system (CNS) that restricts the passage of various chemical substances and microscopic objects (e.g. bacteria) between the bloodstream and the neural tissue …   Wikipedia

• Scanning Electron Microscopy — Microscopie électronique à balayage Pour les articles homonymes, voir MEB, SEM et Microscope. Microscope électronique à balayage JEOL JSM 6340F …   Wikipédia en Français