▎ 摘　　要

NOVELTY - Transferring graphene monolayer from degradable polymer comprises e.g. (i) dissolving the degradable polymer in the solvent to obtain degradable polymer solution having concentration of 10-30 wt.%, where the target substrate needs to be deoxidized before using, ultrasonically irradiating in the acetone, ethanol and water, soaking in the hydrofluoric acid solution with volume ratio of hydrogen fluoride, and water of 1:50 for 1-5 minutes, (ii) transferring graphene/copper sheet, taping on the slide, preventing the graphene/copper sheet from curling, placing the slides loaded with graphene/copper sheets on the spin coater, adding degradable polymer solution in a dropwise, spin-coating, and taking out the slide glass, finishing the spin coating, drying in the natural state for 1-30 minutes, naturally forming the degradable polymer into the film on the surface of the graphene to obtain polymer film/graphene/copper sheet, where the polymer film has thickness of 0.1-0.5 mu m. USE - The graphene monolayer is useful in field e.g. biosensors and tissue engineering. ADVANTAGE - The method: produces product has excellent single layer structure, and high biocompatibility. DETAILED DESCRIPTION - Transferring graphene monolayer from degradable polymer comprises (i) dissolving the degradable polymer in the solvent to obtain degradable polymer solution having concentration of 10-30 wt.%, where the target substrate needs to be deoxidized before using, ultrasonically irradiating in the acetone, ethanol and water for 10-60 minutes, soaking in the hydrofluoric acid solution with volume ratio of hydrogen fluoride, and water in a ratio of 1:50 for 1-5 minutes, (ii) transferring graphene/copper sheet, taping on the slide, preventing the graphene/copper sheet from curling, placing the slides loaded with graphene/copper sheets on the spin coater, adding degradable polymer solution obtained in the step (i) in a dropwise, spin-coating, and taking out the slide glass, finishing the spin coating, drying in the natural state for 1-30 minutes, naturally forming the degradable polymer into the film on the surface of the graphene to obtain polymer film/graphene/copper sheet, where the polymer film has thickness of 0.1-0.5 mu m, (iii) immersing the polymer film/graphene/copper sheet in a solution of 0.05-0.5 mol/l ammonium persulfate, etching the copper sheet for 6-24 hours, completely etching the copper sheet, transferring the polymer film/graphene into the deionized water for 2-4 times with hydrophilic and polished silicon wafer, (iv) rinsing the polymer film/graphene with deionized water floats on the surface of deionized water, transferring the polymer/graphene film into the surface of the target substrate, where the film is required to not curl during the process, flattening on the surface of the target substrate, transferring the polymer film/graphene into the surface of the target substrate, rinsing with deionized water, and drying in the natural state for more than 10 minutes, (v) dissolving the polymer film/graphene/target substrate in the solvent obtained in the step (i), dissolving the polymer film, controlling the temperature at 20-30 degrees C, carrying out the dissolution for 0.1-1 hours, or placing the polymer film/graphene/target substrate in hot water at 80-100 degrees C, and degrading for 12-24 hours, (vi) rinsing the graphene/target substrate in the deionized water for 2-3 times, drying naturally to obtain less residual surface of graphene to obtain graphene/substrate with less residual surface of graphene and complete structure of monolayer graphene.