Patent ID: 7138281
Filing Date: 2006-11-21
Classification: B01J,C40B,G01N

Abstract:
1. A method of fabricating a chip for analysis of analytes, comprising the steps of: a) putting a multielectrodic chip, lithographed on a wafer that contains between 2 and 2000 individually polarizable electrodes, in direct contact with a solution or suspension that comprises modified colloidal particles modified with a chemical or biochemical recognition element; b) applying to one electrode of said chip, a potential between −1 and +2V (vs. Ag/AgCl saturated) for a period of time between 1 and 300 seconds, so that the colloid modified with the chemical or biochemical recognition element is deposited selectively and with micrometric resolution, over the electrode on which the potential has been applied; c) washing the chip after step b); and d) repeating steps a), b) and c) in order to deposit the chemical or biochemical recognition element, equal or different to the one or the ones previously deposited, on each of the electrodes of the chip.