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The low-frequency optical spectrum of AA-stacked graphite exhibits rich magneto-absorption peaks. It is dominated by intraband and interband optical excitations. The former induce a multi-channel threshold peak and several two-channel peaks, while a lot of the double-peak structures are associated with the latter. Such absorption peaks differ considerably from those in other graphites and few-layer...
A tubular cathode support green body for tubular direct methanol fuel cell was prepared by a gel casting molding method using a mixture of mesocarbon microbeads and natural graphite powder with a mass ratio of 3:2 as carbon precursor. It was sintered at 1000°C for 5h in a graphite boat covered by graphite powder. Subsequently, a tubular cathode and a planar anode were obtained by coating the supports...
We report an in situ transmission electron microscopy study of the electrochemical behavior of few-layer graphene nanoribbons (GNRs) synthesized by longitudinal splitting the multi-walled carbon nanotubes (MWCNTs). Upon lithiation, the GNRs were covered by a nanocrystalline lithium oxide layer attached to the surfaces and edges of the GNRs, most of which were removed upon delithiation, indicating...
Using in situ transmission electron microscopy, we observed the nucleation and growth of graphene bilayer edges (BLE) with “fractional nanotube”-like structure from the reaction of graphene monolayer edges (MLEs). Most BLEs showed atomically sharp zigzag or armchair crystallographic facets in contrast to the atomically rough MLEs with irregular shapes, suggesting that the BLEs are much more stable...
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