Interrogating vertically oriented carbon nanofibers with nanomanipulation for nanoelectromechanical switching applications

We have demonstrated electrostatic switching in vertically oriented carbon nanofibers synthesized on refractory metallic nitride substrates, where pull-in voltages V pi ranged from 10 to 40 V. A nanoprobe was used as the actuating electrode inside a scanning-electron microscope and van der Waals int...

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Bibliographic Details
Published in:Applied physics letters 2009-08, Vol.95 (9), p.093103-093103-3
Main Authors: Kaul, Anupama B., Khan, Abdur R., Bagge, Leif, Megerian, Krikor G., LeDuc, Henry G., Epp, Larry
Format: Article
Language:English
Subjects:
ACETYLENE
AMMONIA
CARBON FIBERS
CHEMICAL VAPOR DEPOSITION
ELECTRIC POTENTIAL
ELECTRODES
FINITE ELEMENT METHOD
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
NITRIDES
REFRACTORIES
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SILICON
SUBSTRATES
VAN DER WAALS FORCES
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Summary:We have demonstrated electrostatic switching in vertically oriented carbon nanofibers synthesized on refractory metallic nitride substrates, where pull-in voltages V pi ranged from 10 to 40 V. A nanoprobe was used as the actuating electrode inside a scanning-electron microscope and van der Waals interactions at these length scales appeared significant, suggesting such structures are promising for nonvolatile memory applications. A finite element model was also developed to determine a theoretical V pi and results were compared to experiment. Nanomanipulation tests also revealed tubes synthesized directly on Si by dc plasma-enhanced chemical-vapor deposition with ammonia and acetylene were electrically unsuitable for dc nanoelectromechanical switching applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3211851