The DSPEC is made of two parts: a molecule and also a nanoparticle. The molecule known as a chromophore-catalyst assembly which absorbs sunlight and kick starts the catalyst. This catalyst separates the electrons and the water molecules. The nanoparticles are assembled right into a thin layer and a single nanoparticle https://www.gledhill.net/products/thermal-storage/boilermate-ov-pre-plumbed/