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Record Nr. |
UNINA9910300382703321 |
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Autore |
Littlejohn Samuel David |
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Titolo |
Electrical properties of graphite nanoparticles in silicone : flexible oscillators and electromechanical sensing / / Samuel David Littlejohn |
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Pubbl/distr/stampa |
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New York, : Springer, 2014 |
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ISBN |
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Edizione |
[1st ed. 2014.] |
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Descrizione fisica |
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1 online resource (172 p.) |
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Collana |
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Springer theses : recognizing outstanding Ph.D. research, , 2190-5053 |
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Disciplina |
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Soggetti |
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Silicones |
Nanoparticles |
Graphite |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references. |
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Nota di contenuto |
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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. |
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Sommario/riassunto |
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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 |
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