Electrical properties of graphite nanoparticles in silicone flexible oscillators and electromechanical sensing Samuel David Littlejohn

Format:

Book

Thesis/Dissertation

Author/Creator:

Littlejohn, Samuel David, author.

Series:

Springer theses 2190-5053

Language:

English

Subjects (All):

Nanostructured materials--Electric properties.

Nanostructured materials.

Graphite.

Nanosilicon.

Medical Subjects:

Graphite.

Genre:

dissertations

Academic theses

Physical Description:

1 online resource

Place of Publication:

Cham Springer [2013?]

Summary:

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

Contents:

Background Theory

Fabrication and Measurement

Tunneling Negative Differential Resistance in a GSC

Electromechanical Properties and Sensing

Electronic Amplification in the NDR Region

Conclusions and Future Work

Publications

Procedure for Imprint Lithography Stamp

ICP-RIE Recipe for Deep Silicon Etch

Synthesis of Silane Functionalized Naphthalenediimide

Calculation of Cut-Off Frequency

Notes:

Ph. D. University of Bath (2013?)

Includes bibliographical references

Online resource; title from PDF title page (SpringerLink, viewed September 3, 2013)

Other Format:

Printed edition:

ISBN:

9783319007410

3319007416

OCLC:

857824941

Access Restriction:

Restricted for use by site license