Friday, November 07, 2014

Core–shell nanoparticles and enhanced polarization in polymer based nanocomposite dielectrics

We present a detailed study of the evolution and nature of metallic core–oxide shell particles and the role of nanostructure in the physics of enhanced polarization in polymer-nanocomposite (PNC) based dielectrics. Nylon-6 based PNCs consisting of aluminium (core)–aluminium oxide (shell) nanoparticles were fabricated by a vacuum deposition technique. Their resulting high polarizability was closely related to the formation and chemistry of the core–shell structure that was revealed by transmission electron microscopy to comprise a highly-defective, strained and non-stoichiometric semi-crystalline/amorphous Al-oxide shell.

Amoghavarsha Mahadevegowda, Neil P Young and Patrick S Grant

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