When you need to see something so tiny that light skips right over it—and you don't want it vacuum-sealed and messed with in the way that a transmission electron microscope requires—you're in the market for a scanning electron microscope (SEM).
An SEM is the go-to machine for materials engineers, who are very interested in close-up pictures of faulty pipes or the inner workings of exotic, lab-created composites. That's why UAB's SEM is located on the ground floor of the School of Engineering. But the device is also gaining a following with researchers all over campus, says William Stonewall Monroe, director of the UAB Scanning Electron Microscope facility.
"If you want to look inside something, you use a transmission electron microscope," Monroe says. "That's what most people think of as an electron microscope. But the samples have to be elaborately prepared and able to survive the vacuum conditions."
