▎ 摘　　要

NOVELTY - Method for controllable preparation and transfer of self-supporting two-dimensional materials based on self-assembled monolayer comprises growing a two-dimensional material film on a metal substrate, retaining the two-dimensional material film on one side of the metal substrate, and dropping the surfactant solution on the two-dimensional material film until completely infiltrated, volatilizing the solvent, forming a self-assembled structure on the surface of the two-dimensional material film, floating the metal substrate with two-dimensional material thin film on the surface on the etching solution to remove the metal substrate, obtaining a self-supporting two-dimensional material film on the gas-liquid interface, replacing the etching solution with deionized water, and transferring the self-supporting two-dimensional material film on the gas-liquid interface to the target substrate, drying the two-dimensional material/target substrate, immersing in a solvent for washing and drying. USE - Method for controllable preparation and transfer of self-supporting two-dimensional materials based on self-assembled monolayer. ADVANTAGE - The method uses the surfactant absorbing the two-dimensional material surface form a single-molecule layer assembly structure to reduce the surface, prevent the two-dimensional material curling and damage on the gas-liquid interface, to realize the preparation of the self-supporting two-dimensional-material with controllable layer number. The method is simple and easy, has universality, and is suitable for preparing and transferring self- supporting boron nitride, and has important application prospect in the fields of high resolution electron microscope imaging thermion electron device and isotope separation membrane.