Nanomechanical oscillations in a single-C60 transistor

Park, Hongkun; Park, Jiwoong; Lim, Andrew K. L.; Anderson, Erik H.; Alivisatos, A. Paul; McEuen, Paul L.

doi:10.1038/35024031

Cited by 1,751 publications

(1,887 citation statements)

References 23 publications

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“…[8][9][10][11][12] To be more specific, a surprising feature of the data in Fig. 7 is the absence of degeneracy points along the gate axis for low bias.…”

Section: Molecular Junctions With Oligo(cyclohexylidene)mentioning

confidence: 92%

“…The key question is what characteristic features can be used to distinguish molecular transport from transport through gold grains. It is important to note that at low temperatures up to now three-terminal measurements on molecular junctions have all shown Coulomb blockade features [8][9][10][11][12] including the Kondo effect. 9,10,12 Our measurements presented in the previous section, however, show that Coulomb blockade itself is not a distinctive feature.…”

Section: Molecular Junctionsmentioning

confidence: 99%

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Molecular three-terminal devices: fabrication and measurements

et al. 2006

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Incorporation of a third, gate electrode in the device geometry of molecular junctions is necessary to identify the transport mechanism. At present, the most popular technique to fabricate three-terminal molecular devices makes use of electromigration. Although it is a statistical process, we show that control over the gap resistance can be obtained. A detailed analysis of the current-voltage characteristics of gaps without molecules, however, shows that they reveal features that can mistakenly be attributed to molecular transport. This observation raises questions about which gaps with molecules can be disregarded and which not. We show that electrical characteristics can be controlled by the rational design of the molecular bridge and that vibrational modes probed by electrical transport are of potential interest as molecular fingerprints.

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“…[8][9][10][11][12] To be more specific, a surprising feature of the data in Fig. 7 is the absence of degeneracy points along the gate axis for low bias.…”

Section: Molecular Junctions With Oligo(cyclohexylidene)mentioning

confidence: 92%

Section: Molecular Junctionsmentioning

confidence: 99%

Molecular three-terminal devices: fabrication and measurements

et al. 2006

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“…For C 70 , these are likely associated with the bouncing-ball mode of the molecule, as demonstrated previously for C 60 . 3 The sub-5-meV excitations in C 140 devices might arise either from similar bouncing modes or from the intercage modes of C 140 at 2.5, 2.7, and 4 meV. However, calculations (below) suggest that the tunneling electrons couple strongly only to the intercage stretch mode, not the other internal modes.…”

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confidence: 95%

Vibration-Assisted Electron Tunneling in C₁₄₀ Transistors

et al. 2005

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We measure electron tunneling in transistors made from C 140 , a molecule with a mass−spring−mass geometry chosen as a model system to study electron-vibration coupling. We observe vibration-assisted tunneling at an energy corresponding to the stretching mode of C 140 . Molecular modeling provides explanations for why this mode couples more strongly to electron tunneling than to the other internal modes of the molecule. We make comparisons between the observed tunneling rates and those expected from the Franck−Condon model. When electrons travel through molecules, vibrational modes of the molecules can affect current flow. Molecular-vibrationassisted tunneling was first measured in the 1960s using devices whose tunnel barriers contained many molecules. 1 Recently, effects of vibrations in single molecules have been measured using scanning tunneling microscopes, 2 singlemolecule transistors, 3,4 and mechanical break junctions. 5 Theoretical considerations suggest that different regimes may exist depending on whether tunneling electrons occupy resonant energy levels on the molecule, and also on the relative magnitudes of the rate of electron flow, the vibrational frequency, and the damping rate of vibrational energy. [6][7][8][9][10][11][12][13][14] A quantitative analysis of electron-vibration interactions has been difficult to achieve in previous molecular-transistor experiments. In transistors made from cobalt coordination complexes, 4 neither the precise nature of the vibrational modes nor their energies was determined independently of transport measurements. In transistors made from C 60 , 3 the "bouncing-ball" mode of a single C 60 molecule against a gold surface was observed, a mode not intrinsic to the molecule itself. In this letter we study single-molecule transistors made using a molecule, C 140 , with low-energy internal vibrational modes that are well understood. We observe clear signatures

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“…Electromigration can also be used to break the wires completely, giving typically decice resistances ranging from 100s of kΩ to 100s of MΩ. 4 To calibrate the motion, we performed measurements at 4.2 K on bare Au electrodes after electromigration was used to fully break the wires. The junction resistance increases smoothly upon bending the substrate (Fig.…”

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confidence: 99%

Mechanically Adjustable and Electrically Gated Single-Molecule Transistors

2005

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We demonstrate a device geometry for single-molecule electronics experiments that combines both the ability to adjust the spacing between the electrodes mechanically and the ability to shift the energy levels in the molecule using a gate electrode. With the independent in-situ variations of molecular properties provided by these two experimental "knobs", we are able to achieve a much more detailed characterization of electron transport through the molecule than is possible with either technique separately. We illustrate the devices' performance using C 60 molecules.

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Nanomechanical oscillations in a single-C60 transistor

Cited by 1,751 publications

References 23 publications

Molecular three-terminal devices: fabrication and measurements

Molecular three-terminal devices: fabrication and measurements

Vibration-Assisted Electron Tunneling in C₁₄₀ Transistors

Mechanically Adjustable and Electrically Gated Single-Molecule Transistors

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Nanomechanical oscillations in a single-C60 transistor

Cited by 1,751 publications

References 23 publications

Molecular three-terminal devices: fabrication and measurements

Molecular three-terminal devices: fabrication and measurements

Vibration-Assisted Electron Tunneling in C140 Transistors

Mechanically Adjustable and Electrically Gated Single-Molecule Transistors

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Product

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Vibration-Assisted Electron Tunneling in C₁₄₀ Transistors