▎ 摘　　要

NOVELTY - The biosensor utilizes a conductive graphene prepared using chemical functional groups or a conductive graphine to which a bioreceptor is attached, where the bioreceptor is selectively combined to a target biomaterial on a laminated conductive graphene film repeatedly overlaid with the conductive graphene in order to have a high surface density on a substrate. USE - Biosensor for detecting biological molecules i.e. DNA. ADVANTAGE - The biosensor has a large surface area and excellent electric conductivity, thus increasing the immobilization rate of biological molecules such as DNA, and enhancing the detection sensitivity for biological molecules. The biosensor can accurately detect reactions of biomaterials and bioreceptors on a large scale at once by either directly detecting various target biomolecules or detecting electrochemical signals, and can introduce a detection process by which an accurate measurement even of a small amount of source can be obtained. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating a method for preparation of a biosensor.