Give+a+brief+description+about+what+we+have+to+prepare+for+Specimen

__There are two basic types of SEM's. The regular SEM, which we have in the Iowa State Materials Science Department, requires a conductive sample. An__ [|environmental SEM] __can be used to examine a non-conductive sample without coating it with a conductive material. Three requirements for preparing samples for a regular SEM such as in the Iowa State Materials Science Department are:

1) Remove all water, solvents, or other materials that could vaporize while in the vacuum. 2) Firmly__ [|mount] __all the samples. 3) Non-metallic samples, such as bugs, plants, fingernails, and ceramics, should be__ [|coated] __so they are electrically conductive. Metallic samples can be placed directly into the SEM.__

http://mse.iastate.edu/microscopy/prep.html