▎ 摘　　要

Manipulation of individual graphene sheets/films into specific architectures at macroscopic scales is crucially important for practical uses of graphene. We present herein a versatile and robust method based on annealing of solid carbon precursors on nickel templates and thermo-assisted removal of poly(methyl methacrylate) under low vacuum of similar to 0.6 Pa for fabrication of macroscopic, freestanding, and tubular graphene (TG) architectures. Specifically, the TG architectures can,be obtained as individual and woven tubes with a diameter of similar to 50 mu m, a wall thickness in the range of 2.1-2.9 nm, a density of similar to 1.53 mg center dot cm(-3), a thermal stability up to 600 degrees C in air, an electrical conductivity of similar to 1.48 x 10(6) S center dot m(-1), and field emission current densities on the order of 10(4) A center dot cm(-2) at low applied electrical fields of 0.6-0.7V center dot mu m(-1). These properties show great promise for applications in flexible and lightweight electronics, electron guns, or X-ray tube sources.