Journal
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
Volume 98, Issue 8, Pages 742-748Publisher
CARL HANSER VERLAG
DOI: 10.3139/146.101530
Keywords
carbon nanotube; field-effect transistor; self-assembly; dielectrophoresis; DNA
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A physical self-assembly process based on ac-dielectro-phoretic deposition of single-walled carbon nanotubes between metallic electrodes and subsequent gate-voltage controlled elimination of the metallic nanotubes is reported that allows fabrication of multi-tube carbon nanotube field-effect transistors with electrical ON/OFF ratios up to more than seven orders of magnitude. Before deposition, the carbon nanotubes were suspended by means of single-stranded DNA or sodium-taurodeoxycholate. Exposure of the devices to ethanol vapor revealed a higher sensitivity for devices made from DNA-suspended carbon nanotubes.
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