Nanocages, like gold nanocages, Aquifex aeolicus lumazine synthase nanocages and tellurium nanocages, are subject to ongoing research as shown in figure 1 and 2. A lot of the reported synthesis procedures include self-assembling, etching or mixing during the preparation. Amongst the most actively researched properties of nanocages are cohesive energy, surface plasmon resonance and stability. Very often nanocages are characterized by either transmission electron microscopy, X-ray diffraction or UV. High impact articles within this field report applications in catalysis, drug delivery or medicine/veterinary.