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Real Time and in Situ Control of the Gap Size of Nanoelectrodes for Molecular Devices
- Source :
- Nano Letters. 8:1625-1630
- Publication Year :
- 2008
- Publisher :
- American Chemical Society (ACS), 2008.
-
Abstract
- Molecular electronics is often limited by the lack of a simple method to fabricate nanoelectrodes with controlled gap size. This is partly attributed to the lack of a real time characterization in the fabrication. Here, we report a new method based on an electron induced deposition process operated in scanning electron microscopy that realizes in situ and real time characterization in the nanoelectrode fabrication; thus the gap size can be controlled easily and precisely. It is a clean and nondestructive process for carbon nanotube (CNT) electrodes. The mechanism is detailed. The nanoelectrodes have a pi-conjugated surface due to the deposition of sp(2)-rich amorphous carbon. As an application, DNA molecules are assembled between the CNT electrodes by pi-stacking interaction for current-voltage measurement. Our result provides a feasible route to prepare nanoelectrodes with controlled gap size, and it will be valuable for current efforts in molecular electronics and nanoelectronics.
- Subjects :
- Fabrication
Materials science
Bioengineering
Nanotechnology
Carbon nanotube
law.invention
chemistry.chemical_compound
Computer Systems
law
Materials Testing
Gallium phosphide
Electrochemistry
General Materials Science
Mechanical Engineering
Molecular electronics
Equipment Design
General Chemistry
Condensed Matter Physics
Characterization (materials science)
Equipment Failure Analysis
Amorphous carbon
Nanoelectronics
chemistry
Electrode
Microelectrodes
Subjects
Details
- ISSN :
- 15306992 and 15306984
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Nano Letters
- Accession number :
- edsair.doi.dedup.....0147ebb3fba7d4b371cce5cb3e7a097e