The Thousand Faces of Nanotubes
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Metal-to-semiconductor transition in squashed armchair carbon nanotubes.
We investigate electronic transport properties of the squashed armchair carbon nanotubes, using tight-binding molecular dynamics and the Green's function method. We demonstrate a metal-to-semiconductor transition while squashing the nanotubes and a general mechanism for such a transition. It is the distinction of the two sublattices in the nanotube that opens an energy gap near the Fermi energy...
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Novel carbon composites are fabricated through catalyzed CVD growth of carbon nanotubes directly on the inner surfaces of monolithic carbon aerogel (CA) substrates. Uniform CNT yield is obtained throughout the internal pore volume of CA monoliths with macroscopic dimensions. These composites possess large surface areas (>1000 m(2) g(-1)) and exhibit enhanced electrical conductivity following CN...
متن کاملVertically-aligned carbon nanotubes on aluminum as a light-weight positive electrode for lithium-polysulfide batteries.
A light-weight, high specific surface current collector made of vertically-aligned carbon nanotubes grown on an aluminum substrate was fabricated and studied as a positive electrode in a semi-liquid lithium/polysulfide battery. This simple system delivered stable capacities over 1000 mA h gS(-1) and 2 mA h cm(-2) with almost no capacity loss over 50 cycles.
متن کاملPseudo-capacitive performance of titanate nanotubes as a supercapacitor electrode.
Layered titanate H2Ti3O7 nanotubes were synthesized and firstly used as a supercapacitor electrode in a non-aqueous electrolyte. They exhibited the specific capacitances as high as 414 and 306 F g(-1) at 0.5 and 10 A g(-1), respectively, and 82% of the specific capacitance at the 10th cycle can be retained after 1000 cycles.
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تاریخ انتشار 2016