What is a scanning microscope?
A scanning electron microscope uses a beam of electrons to produce a highly magnified image of a sample. The electron beam scans the surface of the specimen and produces a three-dimensional image.HistoryDennis McMullan constructed the first scanning electron microscope in 1951 at Cambridge University.SignificanceThe electron microscope enables a specimen to be examined at a higher magnification than is possible with a light microscope. More detailed information about the structure and physical characteristics of a specimen can be obtained.FeaturesThe scanning microscope uses a beam of electrons to scan the surface of a conductive sample. The information gathered from the scan is sent to a viewing screen.Sample PreparationTo prepare a sample for a scanning microscope, it must be electrically conductive. Samples can be placed in a device such as a sputter coater and covered in a very thin layer of gold.BenefitsThe scanning electron microscope allows for a highly magnified image with a hi
