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Science 6 July 2001:
Vol. 293. no. 5527, pp. 76 - 79
DOI: 10.1126/science.1061797
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Reports

Carbon Nanotube Single-Electron Transistors at Room Temperature

Henk W. Ch. Postma, Tijs Teepen, Zhen Yao,* Milena Grifoni, Cees Dekkerdagger

Room-temperature single-electron transistors are realized within individual metallic single-wall carbon nanotube molecules. The devices feature a short (down to ~20 nanometers) nanotube section that is created by inducing local barriers into the tube with an atomic force microscope. Coulomb charging is observed at room temperature, with an addition energy of 120 millielectron volts, which substantially exceeds the thermal energy. At low temperatures, we resolve the quantum energy levels corresponding to the small island. We observe unconventional power-law dependencies in the measured transport properties for which we suggest a resonant tunneling Luttinger-liquid mechanism.

Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands.
*   Present address: Department of Physics, University of Texas at Austin, Austin, TX 78712, USA.

dagger    To whom correspondence should be addressed. E-mail: dekker{at}mb.tn.tudelft.nl

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