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{"id":243706,"type":0,"block_id":"1349998863","theme_id":21,"user_id":99236,"path":"1349998863-205710","title":"Redefining Small: Electron Microscopy","pubtitle":"Redefining Small: Electron Microscopy","tags":"","public":true,"publicAccess":true,"private_link_enabled":0,"thumb":"https://s3-eu-west-1.amazonaws.com/infogram-thumbs-200/1349998863.jpg","width":700,"copyright":"Copyright notice","properties":{"transparent":false,"rtl":false,"export_settings":{"showGrid":true,"showValues":true},"whitelabel":false,"embed_button":"enabled","title_link":"infogram","custom_logo":"infogram","custom_link_url":"","embed_button_text":"Share","decimal_separator":".,"},"elements":[{"type":"particle","particle_id":10748791,"object_id":"9dcd66aa-e9ce-11e4-a037-7b5f270fdca9","particle_type":"maintitle","picture":null,"text":"Redefining Small: Electron Microscopy","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":208200,"object_id":"1349999248","particle_type":"bodytitle","picture":null,"text":"An electron microscope uses a beam of electrons to illuminate a specimen and produce a magnified image.","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209884,"object_id":"1350015535","particle_type":"bodytitle","picture":null,"text":"Magnify the Numbers","content_type":"","title":null,"shrink":null},{"type":"chart","chart_id":335570,"object_id":"1350014986","chart_type_nr":1,"data":[[["","Magnification"],["Optical","2000"],["Scanning Transmisson","100000"],["Scanning","100000"],["Transmission","500000"]]],"custom":{},"colors":[],"dimensions":[],"modifier":0,"sheetnames":[],"sheets_settings":[]},{"type":"particle","particle_id":209682,"object_id":"1349999613","particle_type":"bodytitle","picture":null,"text":"Transmission Electron Microscope","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209676,"object_id":"1349999561","particle_type":"bodytext","picture":null,"text":"The original form of electron microscope, the transmission electron microscope (TEM) uses a high voltage electron beam to create an image. The electrons are emitted by an electron gun, commonly fitted with a tungsten filament cathode as the electron source. transmitted through the specimen that is in part transparent to electrons and in part scatters them out of the beam. When it emerges from the specimen, the electron beam carries information about the structure of the specimen that is magnified by the objective lens system of the microscope. the image can be photographically recorded by exposing a photographic film or plate directly to the electron beam,\n","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209683,"object_id":"1349999640","particle_type":"bodytitle","picture":null,"text":"Scanning Electron Microscope","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209684,"object_id":"1349999658","particle_type":"bodytext","picture":null,"text":"The SEM produces images by probing the specimen with a focused electron beam that is scanned across a rectangular area of the specimen (raster scanning). When the electron beam interacts with the specimen, it loses energy by a variety of mechanisms. The lost energy is converted into alternative forms such as heat, emission of low-energy secondary electrons and high-energy backscattered electrons, light emission (cathodoluminescence) or X-ray emission, which provide signals carrying information about the properties of the specimen surface, such as its topography and composition.","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209685,"object_id":"1349999685","particle_type":"bodytitle","picture":null,"text":"Reflection Electron Microscope","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209689,"object_id":"1349999706","particle_type":"bodytext","picture":null,"text":"In the reflection electron microscope (REM) as in the TEM, an electron beam is incident on a surface but instead of using the transmission (TEM) or secondary electrons (SEM), the reflected beam ofelastically scattered electrons is detected. This technique is typically coupled with reflection high energy electron diffraction (RHEED) and reflection high-energy loss spectroscopy (RHELS).","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209867,"object_id":"1350014520","particle_type":"image","picture":"http://s3-eu-west-1.amazonaws.com/infogram-particles-700/1350014520.png"},{"type":"particle","particle_id":209866,"object_id":"1350014504","particle_type":"image","picture":"http://s3-eu-west-1.amazonaws.com/infogram-particles-700/1350014504.png"},{"type":"particle","particle_id":209690,"object_id":"1349999729","particle_type":"bodytitle","picture":null,"text":"Scanning transmission electron microscope\n","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209691,"object_id":"1349999740","particle_type":"bodytext","picture":null,"text":"The STEM rasters a focused incident probe across a specimen that (as with the TEM) has been thinned to facilitate detection of electrons scattered through the specimen. The high resolution of the TEM is thus possible in STEM. The focusing action (and aberrations) occur before the electrons hit the specimen in the STEM, but afterward in the TEM. The STEMs use of SEM-like beam rastering simplifiesannular dark-field imaging, and other analytical techniques, but also means that image data is acquired in serial rather than in parallel fashion. Often TEM can be equipped with the scanning option and then it can function both as TEM and STEM.","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209888,"object_id":"1350016327","particle_type":"image","picture":"http://s3-eu-west-1.amazonaws.com/infogram-particles-700/1350016327.png"},{"type":"particle","particle_id":209891,"object_id":"1350016441","particle_type":"bodytitle","picture":null,"text":"MICROSCOPY AT ASU ","content_type":"","title":null,"shrink":null},{"type":"particle","particle_id":209893,"object_id":"1350016868","particle_type":"quote","picture":null,"text":"\"It&#39;s the most stable high-resolution facility at any American university. We&#39;re on the cutting edge here.\"\n","content_type":"","title":"Professor Ray Carpenter","shrink":null},{"type":"particle","particle_id":209896,"object_id":"1350016916","particle_type":"quote","picture":null,"text":"\"We&#39;ve worked with ASU in the past, we don&#39;t have some of the equipment they do, especially high-resolution microscopes.\"","content_type":"","title":"Michael Shemkunas, a Ph.D.","shrink":null}],"theme":{"createdAt":"2016-04-22T04:54:06.000Z","updatedAt":"2016-12-28T10:32:26.000Z","logoImages":[""],"charts":{"treemap":{"labels":{"name":{"fontFamily":"PT Sans Narrow","fontWeight":"700"},"value":{"fontFamily":"PT Sans 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