▎ 摘　　要

NOVELTY - Preparing graphene, comprises (a) supplying substituted alkyne based precursor (I) to a chamber including a first zone and a second zone, (b) vaporizing or sublimating the precursor (I) in the first zone, and (c) depositing the vaporized or sublimed precursor in the second zone on a metal substrate to form graphene. USE - The graphene is useful in transistor (claimed), and as biosensor for easily adsorbing ionic biomaterials. ADVANTAGE - The graphene induces a surface coupling reaction on the surface of a metal substrate, inhibits the synthesis of one-dimensional or three-dimensional materials, enables synthesis of two-dimensional materials, controls the size of the metal substrate, synthesizes two-dimensional carbon allotropes substituted with hydrogen or nitrogen and linked by single or multiple single carbon triple bonds. The method controls the size of the prepared graphene, facilitates transfer to other substrates, sublimates or vaporizes monomer molecules and simultaneously arranges them on the sublimated or vaporized monomer metal substrate, reduces the time required for the synthesis of graphene, amd can be used as a biosensor that easily adsorbs ionic biomaterials and does not require a fluorescent label. DETAILED DESCRIPTION - Preparing graphene, comprises (a) supplying substituted alkyne based precursor of formula (I) to a chamber including a first zone and a second zone, (b) vaporizing or sublimating the precursor (I) in the first zone, and (c) depositing the vaporized or sublimed precursor in the second zone on a metal substrate to form graphene. X=C or N; and R1-R3=H, Br, F, Cl, or I. INDEPENDENT CLAIMS are also included for: graphene produced by the above method; and transistor comprising a substrate, a source electrode formed on the substrate, a drain electrode formed on the substrate and spaced apart from the source electrode, and a channel layer disposed between the source electrode and the drain electrode and including the graphene.