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Using the density functional theory combined with the nonequilibrium Green's function, the transport properties of double-walled carbon nanotubes (DWCNTs) and carbon boronitride (CBN) heteronanotubes were investigated. As the hopping length increases, the conductance of DWCNTs shows a dramatic variation that is independent of the intertube space. The transport of the CBN heterojunctions also displays...
We present a facile yet effective two-step activation method to prepare a hierarchically porous carbon with natural shiitake mushroom as the starting materials. The first step involves the activation of shiitake mushroom with H3PO4, while the second step is to further activate the product with KOH. The resulting carbon is comprised of abundant micro-, mesopores and interconnected macropores that has...
We present a facile and efficient route to introduce in-plane nanopores on the graphene sheets by activation of graphene aerogel (GA) with phosphoric acid (H3PO4). Results from N2 adsorption and TEM images showed that H3PO4 activation created mesopores with pore size of 2–8nm on the graphene sheets. With such nanopores on graphene sheets, the activated GA exhibits a specific capacitance of 204Fg−1...
Detrimental positive feedback effect due to the semi-conductive nature of carbon nanotube (CNT) was found in Joule heating of CNT/epoxy composite adhesives. In this work a process was developed to overcome the positive feedback effect by using a buckypaper–CNT/epoxy composite plaster patch. With this process, not only the positive feedback effect can be avoided but also more uniform curing of the...
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