▎ 摘　　要

NOVELTY - Use of graphene-based detector as non-contact electrostatic detector, is claimed. The graphene-based detector comprises silicon/silicon dioxide substrate, and graphene provided on the silicon/silicon dioxide substrate, and a metal electrode provided on the graphene. The silicon/silicon dioxide substrate consists of silicon at the bottom and silicon dioxide above silicon. The silicon is a light-doped silicon substrate, and has a resistivity of 1-100 Omega .cm. The graphene is a single layer, a double layer or 3-10 layers of small layers of graphene. USE - Use of graphene-based detector as non-contact electrostatic detector (claimed) for detecting weak electrostatic signals. ADVANTAGE - The graphene-based detector can improve the ability of existing electrostatic detector to detect weak electrostatic signals. DETAILED DESCRIPTION - Use of graphene-based detector as non-contact electrostatic detector, is claimed. The graphene-based detector comprises silicon/silicon dioxide substrate, and graphene provided on the silicon/silicon dioxide substrate, and a metal electrode provided on the graphene. The silicon/silicon dioxide substrate consists of silicon at the bottom and silicon dioxide above silicon. The silicon is a light-doped silicon substrate, and has a resistivity of 1-100 Omega .cm. The silicon dioxide has a thickness of 50-500 nm. The graphene is a single layer, a double layer or 3-10 layers of small layers of graphene. The metal electrode is gold, nickel or platinum. An INDEPENDENT CLAIM is included for preparing graphene-based detector, which involves: (1) preparing graphene on silicon/silicon dioxide substrate by micromechanical stripping method or chemical vapor deposition method; and (2) depositing graphene on two 50 nm thick gold electrodes by electron beam lithography and metal film deposition techniques.