▎ 摘　　要

NOVELTY - The material has a multi-layer structure etching as periodic resonance cells that are arranged in rows and columns. The multi-layer structure comprises a substrate layer, a metal layer, a material layer or graphene material layer, an oxide layer and a dielectric layer. The substrate layer is formed on the metal layer. A gradient force trap is variable in direction, size and resonance frequency by controlling an external electric field, temperature, dielectric coefficient, surface resistivity and thickness of the graphene. USE - Artificial electromagnetic material. ADVANTAGE - The gradient force trap is variable in directions and sizes and resonance frequency can be generated on the surface of the manual electromagnetic metamaterial so as to achieve accurate capture and selection of biomolecules of different sizes by changing dielectric coefficients and surface resistivity of graphene and a topology material. The material avoids influences of scattering force, and gradient force trap is generated to achieve effective capture of particles. DETAILED DESCRIPTION - The metal layer is selected from aluminum layer, gold layer, silver layer, copper layer, nickel layer or platinum layer, and the material layer is selected bismuth tin layer, mercury telluride layer, bismuth telluride layer, bismuth selenide layer, and antimony telluride layer. The graphene layer is selected from a single layer or carbon atom layer. The dielectric layer is selected from alumina layer, silicon nitride layer, magnesium fluoride layer or silica layer. The oxide layer is selected from indium oxide layer, tin oxide layer or indium tin oxide layer. The substrate layer is selected from BK7 optical glass layer, silica layer, silicon nitride layer or alumina layer. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of an artificial electromagnetic material.