Method for plating a metal onto a substrate comprising the steps of i. contacting the substrate with a solution containing nanometer-sized particles having at least one attachment group bearing a functional chemical group suitable for binding to the substrate, thereby forming a layer of said nanometer-sized particles on at least a portion of the substrate surface; and thereafter ii. metal plate the substrate applying a wet-chemical plating method, and wherein the layer of said nanometer-sized particles remain between the substrate surface and the plated metal, and characterized in that the at least one attachment group has the general Formula -B-L-FG, wherein B is a binding group, L is a linking group and FG is the functional chemical group, and wherein the binding group B represents 1. -Si(R 1 R 2)-, wherein R 1 and R 2 independently of each other represent alkoxy groups having from 1 to 12 carbon atoms, alkyl groups having from 1 to 12 carbon atoms, halogen atoms and a bond to oxygen atoms originating from the nanometer-sized particle and/or further attachment groups; or 2. -CH 2 -R 3 -, -CO-NH-, -CO-O-, unsubstituted or substituted aryl, wherein R 3 represents -CHOH-CH 2 -O-, -CHOH-CH 2 -; a linear, unsubstituted or substituted hydrocarbon group having from 1 to 5 carbon atoms; and wherein the linking group L represents a linear, unsubstituted or substituted hydrocarbon group having from 1 to 20 carbon atoms; a cyclic, unsubstituted or substituted hydrocarbon group having from 3 to 8 carbon atoms; a linear or cyclic hydrocarbon group interrupted by one or more oxygen atoms and/or amino groups; the linear or cyclic hydrocarbon group having one or more double or triple bonds; unsubstituted or substituted aryl or heteroaryl, phosphonates and bipyridyl; and wherein the functional chemical group FG represents an amino, carbonyl, carboxyl, ester, epoxy, mercapto, hydroxyl, acrylic, methacrylic, anhydride, acid halide, halogen, allyl, vinyl, styrene, aryl, acetylene, azide, ureido group; 5 to 6 membered heterocyclic hydrocarbon groups containing from 1 to 3 nitrogen atoms; isonicotinamidyl, bipyridyl, nitrile, isonitrile and thiocyanate; and wherein the nanometer-sized particles comprise reactive oxygen groups on their outer surface; and wherein the nanometer-sized particles have a mean diameter, d 50, of between 0.5 - 500 nm. i. contacting the substrate with a solution containing nanometer-sized particles having at least one attachment group bearing a functional chemical group suitable for binding to the substrate, thereby forming a layer of said nanometer-sized particles on at least a portion of the substrate surface; and thereafter ii. metal plate the substrate applying a wet-chemical plating method, 1. -Si(R 1 R 2)-, wherein R 1 and R 2 independently of each other represent alkoxy groups having from 1 to 12 carbon atoms, alkyl groups having from 1 to 12 carbon atoms, halogen atoms and a bond to oxygen atoms originating from the nanometer-sized particle and/or further attachment groups; or 2. -CH 2 -R 3 -, -CO-NH-, -CO-O-, unsubstituted or substituted aryl, wherein R 3 represents -CHOH-CH 2 -O-, -CHOH-CH 2 -; a linear, unsubstituted or substituted hydrocarbon group having from 1 to 5 carbon atoms; and