Nanomaterials are materials that have at least one dimension within the nanometric scale (10-9 m), in a range between 1 and 100 nm. The nanometric size allows the material to have a very high surface area formed by surface atoms, characterized by high energy and reactivity due to their instability. In the last decades, their use and study have increased explosively, due to the improvement and availability of synthesis methods, and characterization techniques. The world of nanomaterials differs from that of bulk materials for their unique physical and chemical properties. They have properties different from those of the single atom or molecule and those of bulk matter with the same chemical composition.