Mechanical & Materials Engineering, Department of
Colossal Dielectric and Electromechanical Responses in Self Assembled Polymeric Nanocomposites
Date of this Version
An electroactive polymer nanocomposite, in which high dielectric constant copper phthalocyanine oligomer (o-CuPc) nanoparticles are incorporated into the block polyurethane (PU) matrix by the combination of “top down” and “bottom up” approaches, was realized. Such an approach enables the nanocomposite to exhibit colossal dielectric and electromechanical responses with very low volume fraction of the high dielectric constant o-CuPc nanofillers (~3.5%) in the composite. In contrast, a simple blend of o-CuPc and PU composite with much higher o-CuPc content (~16% of o-CuPc) shows much lower dielectric and electromechanical responses.
Published in APPLIED PHYSICS LETTERS 87, 182901 (2005). Copyright © 2005 American Institute of Physics. Used by permission.