Diffusion of vitamin B12 in gellan gum-carbon nanotube hydrogels

We report on the diffusion of vitamin B12 through gellan gum-carbon nanotube hydrogels. The addition of carbon nanotubes to gellan gum reduced the vitamin B12 diffusion coefficient from 1.70 x 10-6 cm2/s to 0.70 x 10-6 cm2/s.