Effect of bulk aging on surface diffusion of glasses.

  title={Effect of bulk aging on surface diffusion of glasses.},
  author={Caleb W Brian and Lei Zhu and Lian Yu},
  journal={The Journal of chemical physics},
  volume={140 5},
The effect of physical aging on surface diffusion has been determined for two organic glasses, Indomethacin and Nifedipine. The two systems exhibit similar aging kinetics typical of organic glasses. Surface diffusivity remains unchanged despite significant bulk aging that nearly equilibrates the systems and increases the bulk relaxation time by orders of magnitude. The finding is relevant for understanding the stability of amorphous materials and the formation of low-energy glasses by vapor… CONTINUE READING