Academic Journals Database
Disseminating quality controlled scientific knowledge

Field Emission and Radial Distribution Function Studies of Fractal-like Amorphous Carbon Nanotips

ADD TO MY LIST
 
Author(s): Solá F | Biaggi-Labiosa A | Fonseca LF | Resto O | Lebrón-Colón M | Meador MA

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 4;
Issue: 5;
Start page: 431;
Date: 2009;
Original page

Keywords: Carbon nanotips | Graphite-like a-C | EELS | EFED | Field emission

ABSTRACT
Abstract The short-range order of individual fractal-like amorphous carbon nanotips was investigated by means of energy-filtered electron diffraction in a transmission electron microscope (TEM). The nanostructures were grown in porous silicon substrates in situ within the TEM by the electron beam-induced deposition method. The structure factorS(k) and the reduced radial distribution functionG(r) were calculated. From these calculations a bond angle of 124° was obtained which suggests a distorted graphitic structure. Field emission was obtained from individual nanostructures using two micromanipulators with sub-nanometer positioning resolution. A theoretical three-stage model that accounts for the geometry of the nanostructures provides a value for the field enhancement factor close to the one obtained experimentally from the Fowler-Nordheim law.

Tango Jona
Tangokurs Rapperswil-Jona

     Save time & money - Smart Internet Solutions