A study by a team at IIT Bombay and their collaborators reveals how the majority of commercial use plastic degrades into micro and nano plastic particles. https://www.iitb.ac.in/research-highlight/study-sheds-light-how-micro-and-nano-plastics-form

A generalized nano-thermodynamic model has been constructed that can rapidly predict the elemental distribution in multi-metal alloy nanoparticles as a function of the particle size, shape, composition and temperature. The model can be used with studies on catalytic activity of such nanoparticles [S Divi, A Chatterjee, Generalized nano-thermodynamic model for capturing size-dependent surface