Silane mixtures

An array of polymers on a silanated glass or polymer substrate including a silica surface thereon, wherein the silica surface has covalently attached thereto a silanation coating comprising a mixture of a first compound and a second compound, and wherein the first and second compounds are each covalently attached to the silica surface;

• the first compound comprising a trialkoxy silyl group and wherein the first compound further includes a reactive functional group capable of supporting polymer synthesis selected from the group consisting of hydroxyl, amino and carboxyl, and wherein the polymers of the array are attached to the silanation coating via the active functional group of the first compound;
• the first compound being selected from the group consisting of N-(3-(triethoxysilyl)-propyl)-4-hydroxybutyramide;
• N,N-bis(2-hydroxyethyl)-3-aminopropyltriethoxysilane;
• 3-((2-hydroxyethyl)methylamino)propyl-trimethoxysilane, N-(2-hydroxy-ethyl)-N,N-bis(trimethoxy-silylpropyl)-amine;
• 1,2-bis((2-hydroxyethyl)-(3-trimethoxysilylpropyl)aminoethane;
• 3-acetoxy-propyltrimethoxysilane;
• (trimethoxysilyloxy)-(C3-C12-alkyl)-(triethoxysilane);
• and 3-glycidoxypropyltriethoxysilane;
• and
• the second compound comprising a trialkoxy silyl group and wherein the second compound does not include a reactive functional group of the first compound;
• the second compound being selected from the group consisting of 1,2-bis(trimethoxysilyl)-ethane;
• 1,3-bis(trimethoxysilyl)propane;
• 1,6-bis(trimethoxysilyl)hexane;
• 3-(N,N-dimethyl-amino)-propyl-trimethoxysilane;
• and N,N-bis(3-trimethoxysilylpropyl)-methylamine;
• wherein the molar ratio of the first compound to the second compound ranges from about 1 to 50 to 1 to 500;
• and wherein the mixture of the first and second compounds in the silanation coating imparts increased hydrolytic stability to the coating.