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Real Time and in Situ Control of the Gap Size of Nanoelectrodes for Molecular Devices.
- Source :
-
Nano Letters . May2008, Vol. 8 Issue 6, p1625-1630. 6p. - Publication Year :
- 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 π-conjugated surface due to the deposition of sp 2-rich amorphous carbon. As an application, DNA molecules are assembled between the CNT electrodes by π-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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NANOELECTRONICS
*CARBON nanotubes
*SCANNING electron microscopy
*ELECTRODES
Subjects
Details
- Language :
- English
- ISSN :
- 15306984
- Volume :
- 8
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Nano Letters
- Publication Type :
- Academic Journal
- Accession number :
- 33051013
- Full Text :
- https://doi.org/10.1021/nl080283+