Web Release Date: May 19,
Tunable Permittivity of Polymer Composites through Incremental Blending of Raw and Functionalized Single-Wall Carbon Nanotubes
and
Department of Chemistry, Department of Mechanical Engineering and Materials Science, and The Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, Houston, Texas 77005, and Department of Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan 48824
Received: January 22, 2007
In Final Form: February 26, 2007
Abstract:
A method is reported for controlling the permittivity of single-wall carbon nanotube (SWNT) polymer composites based on variations in the amount of raw and functionalized SWNTs (f-SWNTs) that are incorporated. The total weight percent of SWNTs included in the composites remains constant at 0.5%. Measurements were taken at a frequency range of 1-1000 MHz. The magnitude of the real permittivity varied between 20 and 3.3, decreasing as higher fractions of f-SWNTs are added. This type of control over the permittivity is important for applications including passive RF antenna structures, electromagnetic interference mitigation, and other radio frequency applications.
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