Modified carbon, silicon and germanium surfaces

B - Operations – Transporting – 05 – D

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B05D 1/18 (2006.01) B01J 19/08 (2006.01) B05D 3/06 (2006.01) C12Q 1/68 (2006.01) G01N 21/64 (2006.01) H01L 51/30 (2006.01)

Patent

CA 2422202

Chemically-modified surfaces on unoxidized, bromine- or iodine- terminated carbon, silicon, and germanium substrate are disclosed. Visible light mediates the reaction of protected .omega.-modified, .alpha.-unsaturated aminoalkenes (preferred) with bromine- iodine- or other functional group- terminated carbon, silicon, or germanium surfaces. Removal of the protecting group yields an aminoalkane-modified silicon surface. These amino groups can be coupled to terminal-modified oligonucleotides using a bifunctional cross-linker, thereby permitting the preparation of modified surfaces and arrays. Methods for controlling the surface density of molecules attached to the substrate are also disclosed.

L'invention concerne des surfaces modifiées chimiquement sur des substrats non oxydés de carbone, silicium et germanium à terminaison d'iode ou de brome. La lumière visible permet la réaction d'aminoalcènes (préférés) .alpha.-insaturés, à modification en .omega., protégés, avec des surfaces de carbone, silicium ou germanium à terminaison d'iode, de brome, ou d'un autre groupe fonctionnel. L'élimination du groupe de protection produit une surface de silicium modifiée par un aminoalcane. Ces groupes aminés peuvent être couplés à des olinucléotides à terminaison modifiée à l'aide d'un agent de réticulation bifonctionnel, permettant ainsi la préparation de surfaces et d'ensembles modifiés. L'invention concerne également des procédés de régulation de la densité de surface des molécules attachées au substrat.

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