Metallic nanoparticles show unique characteristics which make them suitable for a wide range of applications, including catalysis, biotechnology, adsorption, magnetic separation and environmental remediation. Their chemical and physical properties can be controlled not only by varying material composition but also by tuning size and shape. A key to understanding nanoparticle properties is mapping the elemental distribution within the nanoparticles in 3D with atomic resolution, which is a highly challenging task. NMAC lab will conduct correlative Atom Probe Tomography (APT) and Transmission Electron Microscopy (TEM) on various nanoparticle systems. The relationship between surface structure, composition of nanoparticles and nanoparticle properties will be carefully elucidated.