Knowledge of structure and chemistry at the atomic scale is crucial to modern materials science and nanotechnology. Advanced electron microscopy can provide the fundamental knowledge that will enables us not only to understand, but also to control the physical and chemical behavior of nanostructured materials. The electron microscopy facility at Brookhaven National Laboratory's Center for Functional Nanomaterials focuses on identifying nanoscale structure-property relationships of energy-related materials by employing state-of-the-art instruments. An electron microscope produces images of extremely small objects by using beams of electrons rather than visible light. Since electrons have a much shorter wavelength than light, the use of electron beams rather than light beams can resolve much finer structural details in the sample. Electrons are beamed at the sample and focused by magnets; a detector then converts the refracted or reflected beams into a black and white image. Powerful electron microscopes can create accurate images of objects as small as individual molecules.