Pashley concluded that the maintenance of the smear layer established a protective diffusion barrier.

The stronger this accumulation, the more effective the aerobic boundary between sediment and water can act as a diffusion barrier for phosphate.

The oxide on the silicon surface acts as a diffusion barrier.

This layer provides chemical and physical protection for the cell surface and can act as a macromolecular diffusion barrier.

Changing the diffusion barrier allows the sensor manufacturer to tailor the sensor to a particular target gas concentration range.

The membrane serves as both an insulator and a diffusion barrier to the movement of ions.

A diffusion barrier is a thin layer (usually micrometres thick) of metal usually placed between two other metals.

Therefore, to be effective, a good diffusion barrier requires inertness with respect to adjacent materials.

Materials providing good adhesion are not necessarily good diffusion barriers and vice-versa.