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The wetting and bonding behaviors between electrode nano-metals and carbon materials play an important role in dissimilar joining and solidification especially for graphene/carbon nanotube (CNT) based nano-devices. As an important indicator, the contact angle between them can provide explicit information for the understanding of their interfacial interactions. However, the conventional sessile drop...
Graphene–CNT (G/CNT) hybrids were formed via in situ joule heating inside a transmission electron microscope (TEM). The formation of the G/CNT structure was suggested to be induced by the sequential and spontaneous unzipping of the outmost wall of the multi-walled CNT under uniformly thermal etching and voltage pulse of 0.2–1V. The conductance of the G/CNT hybrids show a significantly change (up to...
Carbon tubular structures (CTSs) were prepared using metal nanowires/nanotubes, either Ag or Te, as templates. The CTSs are formed by electron beam-induced carbon deposition on the nanowires/nanotubes and the subsequent removal of the core material by direct heating or Joule heating. We call this process “investment casting” of CTSs. The length of the fabricated CTSs varies from sub-micron to tens...
The reported hydrogen uptake of carbon nanotubes (CNTs) has been the subject of much controversy. We have measured the hydrogen uptake capacity of different types of CNTs using a volumetric measurement setup specifically-designed for CNTs. It was found that under a pressure of ∼12MPa and at room temperature, the hydrogen storage capacity of the CNTs is less than 1.7wt.%, which is far below the benchmark...
Multi-walled carbon nanotubes (MWNTs) with different mean outer diameters in the range of 13-53 nm, synthesized by the catalytic decomposition of hydrocarbons using a floating catalyst method, were purified and pretreated with the same procedure for volumetric hydrogen adsorption/desorption measurements. It was found that the hydrogen storage capacity of the purified and pretreated MWNTs was proportional...
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