▎ 摘　　要

NOVELTY - The nanosensor (100) has an insulating layer (110) provided with a first pore i.e. nanopore. A graphene layer (120) is arranged on the insulating layer and provided with a second pore (122) or a gap that is formed adjacent to the first pore. A marker element (160) is arranged adjacent to the graphene layer, and identifies position of the graphene layer. The marker element is formed of metal material, insulating material, or polymer. The marker element comprises a first marker (162) and a second marker (164) that are spaced apart from each other. USE - Nanosensor. ADVANTAGE - The nanosensor forms the nanogap or a nanopore with a resolution equal to or less than about 0.34 nanometer, increases electron mobility and measures the order of bases in an efficient manner. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method of manufacturing a nanosensor (2) a method of forming a marker on an electronic device. DESCRIPTION OF DRAWING(S) - The drawing shows a top view of a nanosensor. Nanosensor (100) Insulating layer (110) Graphene layer (120) Pore (122) Marker element (160) Markers (162, 164)