▎ 摘　　要

NOVELTY - Preparing nano-gap mechanically controllable single layer graphene single molecular junction comprises taking single molecule junction is made of an elastic thin copper sheet, a silicon dioxide insulating layer, single layer graphene electrode pair, gold covering layer and three-point bending device, using elastic copper sheet as an insulating layer for generating silicon dioxide film, bending the formed silicon dioxide/copper substrate and the silicon dioxide film can planarize the surface to facilitate the transfer of monolayer graphene onto the silicon dioxide/copper substrate. USE - The method is useful for preparing nano-gap mechanically controllable single layer graphene single molecular junction (claimed). ADVANTAGE - The method has significance in the development of molecular electronics. DETAILED DESCRIPTION - Preparing nano-gap mechanically controllable single layer graphene single molecular junction comprises taking single molecule junction is made of an elastic thin copper sheet, a silicon dioxide insulating layer, single layer graphene electrode pair, gold covering layer and three-point bending device, using elastic copper sheet as an insulating layer for generating silicon dioxide film, bending the formed silicon dioxide/copper substrate, the silicon dioxide film can planarize the surface to facilitate the transfer of monolayer graphene onto the silicon dioxide/copper substrate, using the gold coating to fix single-layer graphene, using the wet etching as the middle part to have groove, providing suspended nano-bridge and using the three-point bending device to bend chip and accurately controlling nano-gap size.