A method and apparatus for the manipulation of colloidal particles and biomolecules at the interface between an insulating electrode such as silicon oxide and an electrolyte solution. Light-controlled electrokinetic assembly of particles near surfaces relies on the combination of three functional elements:...http://www.google.com.au/patents/US7291504?utm_source=gb-gplus-sharePatent US7291504 - Assay involving detection and identification with encoded particles
