The DNA Prism
The DNA prism allows for the separation of DNA within seconds. Electric fields applied at different angles and frequencies to DNA within a microarray yield separation according to length. 13% resolution was achieved using 2 micrometer posts with a 2 micrometers gap size. Please refer to the paper below. (Figure from paper.)
 

 

Papers

L.R. Huang, P. Silberzan, J.O. Tegenfeldt, E.C. Cox, J.C. Strum, R.H. Austin. (2002) A DNA prism for high-speed continuous fractionation of large DNA molecules. Nat. Biotechnology: 20(10); 1048-1051.