Microwave Conductance of Aligned Multiwall Carbon Nanotube Textile Sheets



Multiwall carbon nanotube (MWNT) sheets are a class of nanomaterial-based multifunctional textile with potentially useful microwave properties. To understand better the microwave electrodynamics, complex AC conductance measurements from 0.01 to 50 GHz were made on sheets of highly aligned MWNTs with the alignment texture both parallel and perpendicular to the microwave electric field polarization. In both orientations, the AC conductance is modeled to first order by a parallel frequency-independent conductance and capacitance with no inductive contribution. This is consistent with low-frequency diffusive Drude AC conduction up to 50 GHz, in contrast to the "universal disorder" AC conduction reported in many types of single-wall nanotube materials.



Carbon nanotubes, Microwaves, Capacitance, Electric power transmission--Alternating current, Anisotropy


"Work at Sandia and UTD Department of Physics was supported by the DOE Office of Basic Energy Sciences. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under Contract No. DE-AC04-94AL85000. Work at the UTD McDiarmid NanoTech Institute was supported by the U.S. Air Force Office of Scientific Research (via Contract No. FA9550-09-1-0384 on “Strengthening Superconductivity in Nanostructures”)."


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