Documents Crystallisation from melts Why do crystals form? What controls their shape and size? Three...

Slide 1 Crystallisation from melts  Why do crystals form?  What controls their shape and size?  Three aspects to the growth of a crystal are Nucleation: formation…

Documents Preparation of Silica Nanoparticles

Preparation of silica nanoparticles Process: Sol - Gel - Synthesis - Precipitation Chemical reactions: Hydrolysis - Polycondensation Hydrolysis: Si(OC2H5)4 + 4 H2O Si(OH)4…