Patent ID: 6673401
Filing Date: 2004-01-06
Classification: B82Y,C07B,C12N,C40B,H01F,Y10T

Abstract:
A laminar layered structure comprising:a substrate having a surface; a layer of synthetic DNA segments assembled on a substrate to produce a 2-dimensional crystal with a regular cellular structure for allowing colloidal particles to contact and adhere to the substrate; and an affinity layer disposed over at least part of said surface of said substrate; and a protective coating Conned over said layer of synthetic DNA segments, said particles and said affinity layer, wherein said synthetic DNA segments are produced with sequences permitting formation of a 2-dimensional lattice having a lattice spacing of less than 50 nm, wherein said colloidal particles are produced by solution phase synthesis and have diameters in a range of below 20 nm uniform in size to better than 10% in diameter, and wherein said particles comprise a magnetic material selected from the group consisting of elements Co, Fe, Ni, Mn, Sm, Nd, Pr, Pt, Gd, an intermetallic compound of the aforesaid elements, a binary alloy of said elements, a ternary alloy of said elements, an oxide of Fe further comprising at least one of said elements other than Fe, barium ferrite, and strontium ferrite, and wherein said affinity layer comprises a molecule comprises a first functional group for binding said affinity layer to said substrate, and a second functional group for binding said affinity layer to said at least one particle.