Electrical Properties of Graphite Nanoparticles in Silicone

Flexible Oscillators and Electromechanical Sensing

  • Samuel David Littlejohn

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xv
  2. Samuel David Littlejohn
    Pages 1-3
  3. Samuel David Littlejohn
    Pages 5-38
  4. Samuel David Littlejohn
    Pages 39-62
  5. Samuel David Littlejohn
    Pages 63-83
  6. Samuel David Littlejohn
    Pages 85-118
  7. Samuel David Littlejohn
    Pages 119-151
  8. Samuel David Littlejohn
    Pages 153-157
  9. Back Matter
    Pages 159-166

About this book

Introduction

This thesis examines a novel class of flexible electronic material with great potential for use in the construction of stretchable amplifiers and memory elements.  Most remarkably the composite material produces spontaneous oscillations that increase in frequency when pressure is applied to it. In this way, the material mimics the excitatory response of pressure-sensing neurons in the human skin. The composites, formed of silicone and graphitic nanoparticles, were prepared in several allotropic forms and functionalized with naphthalene diimide molecules. A systematic study is presented of the negative differential resistance (NDR) region of the current-voltage curves, which is responsible for the material’s active properties. This study was conducted as a function of temperature, graphite filling fraction, scaling to reveal the break-up of the samples into electric field domains at the onset of the NDR region, and an electric-field induced metal-insulator transition in graphite nanoparticles. The effect of molecular functionalization on the miscibility threshold and the current-voltage curves is demonstrated. Room-temperature and low-temperature measurements were performed on these composite films under strains using a remote-controlled, custom-made step motor bench.

Keywords

Bilayer Graphene Composite Films Flexible Electronic Materials Functionalization with Naphthalene Diimide Functionalized Composite Materials Graphite and Graphene Negative Differential Resistance (NDR) Pressure-sensing Neurons Silicone and Graphitic Nanoparticles

Authors and affiliations

  • Samuel David Littlejohn
    • 1
  1. 1.Department of PhysicsUniversity of BathBathUnited Kingdom

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-319-00741-0
  • Copyright Information Springer International Publishing Switzerland 2014
  • Publisher Name Springer, Cham
  • eBook Packages Physics and Astronomy
  • Print ISBN 978-3-319-00740-3
  • Online ISBN 978-3-319-00741-0
  • Series Print ISSN 2190-5053
  • Series Online ISSN 2190-5061
  • About this book