Anlage Research Group

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CNAM

MRSEC

MURI

Chaos@UMD

IREAP

UM NanoScience Center

Physics Department

ECE Department

We are interested in the high frequency properties and physics of nanostructured materials. Carbon nanotubes and graphene have interesting electrodynamic properties that are governed by quantum mechanics.

We have discovered that carbon nanotube (CNT) thin films can act as transparent conductors. They can be thin enough to be optically transparent, yet still shield out RF and microwave fields quite effectively. For example, shielding effectiveness of 43 dB at 10 MHz and 28 dB at 10 GHz is found for films with 90% optical transmittance.

We have also investigated the high frequency conductivity and nonlinear resistance properties of CNT networks and established a novel connection between these measurements. They both measure the mean distance between high-resistance contacts between the nanotubes.

This work is done in collaboration with Prof. George Gruner of UCLA and Prof. Michael Fuhrer of CNAM/UMD.

Papers: (All papers can be downloaded from the full publication list)

122. Hua Xu, Liangbing Hu, Steven M. Anlage, and George Gruner, “Microwave shielding of transparent and conducting single-walled carbon nanotube films,” Appl. Phys. Lett., 90 , 183119 (2007). pdf

125. Hua Xu, Shixiong Zhang, Steven M. Anlage, Liangbing Hu, and George Grüner, “ Frequency- and electric-field-dependent conductivity of single-walled carbon nanotube networks of varying density ,” Phys. Rev. B 77 , 075418 (2008). DOI: 10.1103/PhysRevB.77.075418. pdf