▎ 摘　　要

NOVELTY - Preparing transmission electron microscope carrier net containing ultra-clean graphene carrier layer comprises (i) growing copper foil with graphene film on surface, and placing copper foil side down on surface of etchant solution, (ii) dropping few drops of heptane to make heptane completely cover upper surface of graphene film, (iii) contacting transmission electron microscope carrier with graphene in manner from top of graphene film or from edge of graphene film to middle for combining transmission electron microscope carrier with graphene film floating on surface of iron(III) chloride solution, (iv) horizontally moving transmission electron microscope grid horizontally on surface of etchant solution, and dragging transmission electron microscope carrier grid containing graphene carrier layer horizontally away from liquid surface, and (v) horizontally moving transmission electron microscope carrier screen containing graphene carrier layer on water surface, and drying. USE - The method is useful for preparing transmission electron microscope carrier net containing ultra-clean graphene carrier layer, which is useful in situ characterization and tracking of liquid phase reaction under transmission electron microscope. ADVANTAGE - The method: adopts the principle of balance of interfacial tension between two liquid surfaces; utilizes the water-immiscible liquid heptane as a protective layer; utilizes volatile liquid heptane instead of high polymer as protective layer, which can effectively avoid the residue of the high polymer, graphene surface the purity of the graphene surface; utilizes iron chloride added with anti-wrinkle agent as etching agent, capable of inhibiting the floating on the single layer graphene the liquid surface of the self-shrinking phenomenon to avoid the generation of graphene surface, and combining the graphene with the carrier net which can ensure that one surface of graphene combined with the copper substrate is upward; avoids the copper-based graphene formed in the growth surface of impurity; and conveniently and quickly transfers the ultra-clean graphene to the electronic microscope carrier surface and keep the superiority and high coverage rate. DETAILED DESCRIPTION - Preparing transmission electron microscope carrier net containing ultra-clean graphene carrier layer comprises (i) growing copper foil with graphene film on surface, and placing copper foil side down on surface of etchant solution, (ii) dropping few drops of heptane to make heptane completely cover upper surface of graphene film until copper foil is completely dissolved, (iii) contacting transmission electron microscope carrier with graphene in manner from top of graphene film or from edge of graphene film to middle for combining transmission electron microscope carrier with graphene film floating on surface of iron(III) chloride solution, (iv) horizontally moving transmission electron microscope grid horizontally on surface of etchant solution, and dragging transmission electron microscope carrier grid containing graphene carrier layer horizontally away from liquid surface, and (v) horizontally moving transmission electron microscope carrier screen containing graphene carrier layer for multiple times on water surface to clean residue, and drying. An INDEPENDENT CLAIM is also included for a transmission electron microscope carrier net containing an ultra-clean graphene carrier layer prepared by above mentioned method.