2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Development of Nanostructures, Nanodevices, Nanocomposites, and Hierarchical Nanocomposites at Hawaii Nanotechnology Laboratory

M. Ghasemi-Nejhad and A. Cao
University of Hawaii at Manoa, US

Keywords:
carbon nanotube, nanoparticles, nanocomposites, Hierarchical nanocomposites, nanobrush, nanofoam, nanoforest

Abstract:
This paper presents activities related to the development of nanostructures, nanodevices, nanocomposites, and hierarchical nanocomposites at the Hawaii Nanotechnology Laboratory of the Department of Mechanical Engineering of the University of Hawaii at Manoa. On nanostructures, we will describe our carbon nanotube-based nanofoams along with their mechanical performance under the compressive fatigue loading. On nanodevices, we will describe our carbon nanotube-based nanobrushes along with their multifunctionalities in terms of mechanical, chemical, and electrical performances with their applications as nanodevices. On nanocomposites, developments on toughening of polymeric materials employing nanoparticles and carbon nanotubes are reported. On hierarchical nanocomposites, first, mechanical properties improvements for continuous fiber ceramic composites using nanoparticles are discussed. Next, the multifunctional properties improvement of a novel three-dimensional hierarchical nanocomposite employing carbon nanotubes nanoforests as the through-the-thickness reinforcment is discussed. The multifunctional properties improvements in terms of mechanical, thermomechanical, structural dynamics, thermal, and electrical performances will be reported. In closing, the effects of chirality of single-walled nanotubes on their thermomechanical properties evaluated analytically using asymptotic homogenization method and numerically employing finite element method will be explained, and analytical closed form solutions for matrix filled nanotube nanocomposites, also verified numerically, assuming generally cylindrical orthotropic properties will be reported.

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