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The dehydration kinetics of graphene oxide (GO) were investigated by in-situ two-dimensional grazing incident X-ray diffraction. We found that the interlayer spacing of the GO membrane gradually decreased as the annealing temperature increased and as time elapsed. Surprisingly, we observed the formation of an intermediate “water-rich” GO layers at 25 °C with an interlayer spacing of approximately...
Carbon nanotube hybrids with molybdenum and tungsten disulfides have attracted lots of attentions due to their unique electronic and photonic properties. MoS2 and WS2 with different layers and morphology have been produced from homogeneous ultra-fine MoO3 and WO3 nanoparticles (1–2nm) with different densities on multi-walled carbon nanotubes (MWCNTs) in this work. The different MWCNT hybrid structures...
Mildly oxidized graphene has been prepared by O2 plasma treatments. Compared to pristine graphene, the mildly O2 plasma treated graphene can significantly enhance the Raman peaks intensities of adsorbed Rhodamine B molecules. This effect is attributed to the strong local electric field on the adsorbed molecules induced by the oxygenated species on graphene after O2 plasma treatments. The downshift...
The preparation of graphene/polymer composites by direct exfoliation of graphene from micro-sized graphite using a pyrene-functionalised amphiphilic block copolymer, poly(pyrenemethyl acrylate)-b-poly[(polyethylene glycol) acrylate] (polyPA-b-polyPEG-A), in either aqueous or organic media is presented. PolyPA-b-polyPEG-A was prepared using reversible addition fragmentation chain transfer (RAFT) polymerization...
High-quality double-walled carbon nanotubes (DWCNTs) thin-films have been fabricated in one-step by the catalytic chemical vapor deposition gas-flow reaction process with acetone as a carbon source in an argon flow. The DWCNTs film is formed through the self-assembly of the DWCNTs in the gas flow, which is achieved by controlling the gas rates in the synthesis reaction. The DWCNT film is self-supported...
A cost-effective method was used to fabricate large area (e.g. 2.5×2.5cm 2 for a pitch of 0.5μm) nanometer scale pyramid arrays with precise and controllable location, spacing and size by interference lithography. Using this method a large-area of vertically-aligned carbon nanofibers (VACNFs) with different interfiber-distance-to-fiber-height ratios and fiber aspect ratios were synthesised...
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