Students with a chemical engineering degree work in a wide array of areas, ranging from chemical and energy to pharmaceuticals, textiles, consumer goods, polymers, solid-state and biomedical devices. Some chemical engineers, who are also known as process engineers, specialize in a particular process, such as oxidation (a reaction of oxygen with chemicals to make other chemicals) or polymerization (the making of plastics and resins). Others specialize in a particular field such as nanomaterials (extremely small substances) or biological engineering, while still others specialize in developing specific products.