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We report the self-assembly of monolayer polyhedral oligomeric silsesquioxane (POSS) on graphene oxide (GO), where GO acts as a directing template along with the assembly of POSS into a three-dimensional porous framework structure, shortly termed as PPG. The PPG framework contains ultrathin nanopetals with a thickness of ca. 1.95 nm, giving rise to reduced restacking and high surface area. The PPG...
Compared with mechanically exfoliated and chemical vapor deposited graphene, reduced graphene oxide (RGO) possesses unique advantages such as a wet process synthesis, high yield and the ability to assemble large-area thin films on various substrates. However, RGO is normally not recommended for advanced devices owing to its poor electrical conductivity. We report a new method to prepare highly conductive...
Graphene is an atomically thin two-dimensional material which is well suited for kirigami-like cutting. We constructed a class of four-zigzag-edged parallelogram-shaped cutting graphenes as scattering region, forming an angle of 60° with electrodes. Based on the first-principles transport calculations, we have illustrated that this system has perfect spin filtering effect, which arises from hybrid...
In this study, we introduce a method for large-area and substrate-independent synthesis of the big-inner-diameter carbon nanotube (BIDI-CNT) thin films by utilizing polydopamine (PDA) as carbon source and ZnO nanorods (NRs) as sacrificing template for the first time. ZnO NRs with hexagonal morphology were coated with PDA films via the ammonium persulfate-induced polymerization of dopamine at neutral...
Nitrogen-doped ordered mesoporous carbon spheres (N-OMCs) were conveniently produced by using a soluble urea–phenol–formaldehyde resin as the precursor and triblock copolymer F127 as a soft template. The obtained carbon spheres with a mean diameter of around 240nm possessed a variable surface nitrogen content of 0.38–1.4wt.%, an ordered Im3m mesostructure, and a uniform pore size of around 2.8nm....
Hybrid nanocrystals, fullerene-decorated graphene, were incorporated into the epoxy composites, and their electrical and thermal transport was investigated. The hybrid nanocrystals were fabricated through a solution process and the resultant hybrid nanostructure was verified by transmission electron microscopy and X-ray diffraction characterization. After incorporation of fullerene-functionalized...
High intensity electron emission cathodes based on carbon nanotube films have been successfully fabricated by use of a screen printing method. The emission properties of the cathode were investigated in single-pulse and double-pulse modes. The high intensity emission from the cathode is obtained and the highest emission current density reaches 267A/cm 2 at an electric field of 15.4V/μm in...
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