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Carbon Nanotube T Junctions: Formation and Properties

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The formation of carbon nanotube T junctions (CNTJs) and their transport properties are reviewed. The CNTJs were formed by coupling chemically functionalized nanotubes with linker molecules. Both end-to-side and end-to-end intermolecular junctions can be assembled by reacting chloride terminated nanotubes with aliphatic diamines. The functionalized nanotube mats were characterized by Raman spectroscopy and X-ray photoelectron spectroscopy. The incorporation of functional groups into nanotubes is indicated by the pronounced shift of tangential vibration modes in Raman spectra and of carbon 1s binding energy in X-ray photoelectron spectra. For transport measurements the functionalized nanotubes were adsorbed on Si substrates, and subsequent electrodes were painted on top of the selected T junctions by lithography and lift-off techniques. The bar of the "T" is used as the transistor channel and the stem of the "T" is used as the gate. In this configuration, the active area is confined to a few nanometers in all three dimensions.


Document Type: Review Article


Publication date: January 1, 2008

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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