Electron transport in very clean, as-grown suspended carbon nanotubes

  title={Electron transport in very clean, as-grown suspended carbon nanotubes},
  author={Jie Cao and Qian Wang and H. Dai},
  journal={Nature Materials},
Single-walled carbon nanotubes have shown a wealth of quantum transport phenomena thus far1,2,3,4,5,6,7,8,9,10,11. Defect-free, unperturbed single-walled carbon nanotubes with well behaved or tunable metal contacts are important for probing the intrinsic electrical properties of nanotubes. Meeting these conditions experimentally is non-trivial owing to numerous disorder and randomizing factors. Here we show that ∼1-μm-long fully suspended single-walled carbon nanotubes grown in place between… 

Electrical characterization of the mutual influences between gas molecules and single-walled carbon nanotubes.

It is demonstrated that in addition to the morphology, the transport properties of CNTs can also be modified in this manner, and a significant reduction of the resistance in SWNT devices is shown by such current-induced annealing (CIA) due to the removal of gas molecules from the SWNTs.

Suspended Carbon Nanotubes As Electronical and Nano-electro-mechanical Hybrid Systems in the Quantum Limit

Ultra clean and freely suspended carbon nanotubes provide an ideal model system for electronical transport measurements, and for the investigation of the interplay with their mechanical vibration in

Electrically driven thermal light emission from individual single-walled carbon nanotubes.

It is shown that, under low bias voltages, a suspended quasi-metallic SWNT (QM-SWNT) emits light owing to Joule heating, displaying strong peaks in the visible and infrared, corresponding to interband transitions.

Universal interaction-driven gap in metallic carbon nanotubes

Suspended metallic carbon nanotubes (m-CNTs) exhibit a remarkably large transport gap that can exceed 100 meV. Both experiment and theory suggest that strong electron-electron interactions play a

Evaluating defects in solution-processed carbon nanotube devices via low-temperature transport spectroscopy.

This study suggests that SWNTs derived from stable solutions in this work are free from hard defects and are relatively clean, which has strong implications on the use of solution-processed SW NTs for future nanoelectronic device applications.

Spectroscopy of localized excitons in carbon nanotubes

Semiconducting single-walled carbon nanotubes are nanoscale, hollow cylinders with photoluminescence of strongly bound electron-hole pairs (excitons). The optical emission shows diameter-dependent

Low-Temperature, Directly Depositing Individual Single-Walled Carbon Nanotubes for Fabrication of Suspended Nanotube Devices

Single-walled carbon nanotubes (SWNTs) grown by chemical vapor deposition (CVD) are widely used for fabrication of high-performance nanotube devices. However, the high-temperature growth is

Realization of pristine and locally tunable one-dimensional electron systems in carbon nanotubes.

A new technique for deterministic creation of locally-tunable, ultralow-disorder electron systems in carbon nanotubes suspended over complex electronic circuits is demonstrated and could enable many novel experiments on electronics, mechanics and spins in one dimension.

Transport through graphene quantum dots

Transport experiments on graphene quantum dots and narrow graphene constrictions are reviewed, finding that the filling sequence of subsequent spin states is similar to what was found in GaAs and related to the non-negligible influence of exchange interactions among the electrons.

Carbon Nanotube quantum dots: Transport, mechanical charge detection, and fabrication development

Within this thesis, a diverse set of experiments on carbon nanotube quantum dots is presented and evaluated. Different fabrication methods, and improvement of single steps of established known



Individual single-wall carbon nanotubes as quantum wires

Carbon nanotubes have been regarded since their discovery1 as potential molecular quantum wires. In the case of multi-wall nanotubes, where many tubes are arranged in a coaxial fashion, the

Kondo physics in carbon nanotubes

It is reported that electrically contacted single-walled carbon nanotubes can serve as powerful probes of Kondo physics, demonstrating the universality of the Kondo effect.

Suspended carbon nanotube quantum wires with two gates.

The suspended nanotubes exhibit little hysteresis related to environmental factors and act as cleaner Fabry-Perot interferometers or single-electron transistors and facilitate future investigations into the electromechanical properties of nanotube quantum systems.

Determination of electron orbital magnetic moments in carbon nanotubes

Electrical measurements of relatively small diameter (2–5 nm) individual CNTs in the presence of an axial magnetic field are reported to confirm quantitatively the predicted values for µorb, a large orbital magnetic moment that is thought to play a role in the magnetic susceptibility of C NTs and the magnetoresistance observed in large multiwalled CNTS.

Resonant electron scattering by defects in single-walled carbon nanotubes.

The characterization of defects in individual metallic single-walled carbon nanotubes by transport measurements and scanned gate microscopy and an intratube quantum dot device formed by two defects is demonstrated by low-temperature transport measurements.

Single-Electron Transport in Ropes of Carbon Nanotubes

The electrical properties of individual bundles, or “ropes,” of single-walled carbon nanotubes have been measured, and dramatic peaks were observed in the conductance as a function of a gate voltage that modulated the number of electrons in the rope.

Synthesis of individual single-walled carbon nanotubes on patterned silicon wafers

Recent progress in the synthesis of high-quality single-walled carbon nanotubes (SWNTs) has enabled the measurement of their physical and materials properties. The idea that nanotubes might be

Intrinsic electrical properties of individual single-walled carbon nanotubes with small band gaps

Individual single-walled carbon nanotubes (SWNT) exhibiting small band gaps on the order of 10 meV are observed for the first time in electron transport measurements. Transport through the valence or

Quantum interference and ballistic transmission in nanotube electron waveguides.

Two units of quantum conductance 2G(0) = 4e(2)/h are measured for the first time, corresponding to the maximum conductance limit for ballistic transport in two channels of a nanotube.

Magneto-Optics and Ultrafast Optics in Micelle-Suspended Single-Walled Carbon Nanotubes

We report results of 1) a high-field (≤ 45 T) magneto-optical study and 2) a femtosecond nearinfrared pump-probe study of micelle-suspended singlewalled carbon nanotubes (SWCNTs) whose linear