Apparatus for capillary electrophoresis with polyelectrolyte multilayer coating on the capillary walls

An apparatus for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica and the polyelectrolyte multilayer positioned within the passage. The polyelectrolyte multilayer comprises layers with alternating charge. The apparatus includes a power supply having a positive electrode and a negative electrode for generating an electric field therebetween and a sensor positioned adjacent the passage for sensing macromolecules.