Understanding photogenerated carrier transport in 2D perovskites, especially surface states, is challenging with conventional ...

A cell will eventually become so large there is not enough surface area to allow the diffusion of sufficient substances like oxygen and it will die. As organisms need a large enough surface area ...

Alveoli in the lungs, fish gills and the villi in the small intestine are adapted so that they have short diffusion distance, big concentration difference and large surface area. This means that ...