The application of an electric field across an interface separating two 
polymers with different dielectric constants produces an electrostatic 
pressure, a force acting on the interface to enhance fluctuations and to 
align the interface parallel to the applied field lines.   With 
homogeneous fluids, the surface and interfacial tensions oppose each 
other such that a fluctuation with a characteristic wavelength is amplified.  
Control over the wavelength can be obtained by varying the interfacial 
tension with block copolymers.  Reducing the interfacial causes a 
reduction in the characteristic wavelength.  This phenomenon has been 
used to replicate surface topographies with exceptionally high fidelity 
and represents a means of performing high resolution lithography in a 
simple, direct  manner without the use of any solvents.