摘要
We report a bottom-up synthesis of a new graphyne allotrope-graphtetrayne(GTTY),which features four acetylene linkages between the adjacent benzene on the surface of copper under low temperature.The as-prepared GTTY exhibited nanosheet morphology with an average thickness of 4.5 nm.Structural analysis based on high-resolution transmission electron microscopy(HR-TEM)/selected area electron diffraction(SAED)characterizations revealed high crystallinity formed with a ninefold stacking structure.The GTTY displayed excellent semiconductor properties bearing a band gap of 1.3 eV and a conductivity of 0.285 S m^(−1)at room temperature.Moreover,by the space-charge-limited current(SCLC)method,the measured hole and electron mobilities of the GTTY films reached up to 1.47×10^(3) cm^(2) V^(−1)S^(−1)and 2.98×10^(3)cm^(2)V^(−1)S^(−1),respectively.
基金
This study was supported by the National Natural Science Foundation of China(nos.51722302,21674054,and 51972185).
