Scanning electron microscopy (SEM) is a powerful imaging technique to study the morphology (shape, size, particle arrangement, etc.), surface topology (relief, texture, etc.), and chemical composition (relative ratios of chemical elements from carbon to uranium) of a sample. The SEM uses a focused beam of high-energy electrons to generate a variety of signals at the surface of solid specimens revealing information about the sample. SEM is used to analyze a multitude of samples of all shapes, compositions and sizes for samples stable under high-vacuum conditions. SEM is a non-destructive analytical method for electrically conductive material. The study of insulting materials, on the other hand, requires extra step for sample preparation including the deposition of thin conductive layer (carbon or palladium alloy).