News: Putting a damper on nanoresonators.

@article{Bunch2011NewsPA,
  title={News: Putting a damper on nanoresonators.},
  author={Joseph Scott Bunch},
  journal={Nature nanotechnology},
  year={2011},
  volume={6 6},
  pages={
          331-2
        }
}
  • J. Bunch
  • Published 1 June 2011
  • Physics, Engineering
  • Nature nanotechnology
The observation of nonlinear damping in resonators made from carbon nanotubes and graphene should lead to an improved understanding of energy losses in nanomechanical devices. 

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References

SHOWING 1-10 OF 13 REFERENCES
Electromechanical Resonators from Graphene Sheets
TLDR
The thinnest resonator consists of a single suspended layer of atoms and represents the ultimate limit of two-dimensional nanoelectromechanical systems and is demonstrated down to 8 × 10–4 electrons per root hertz.
Nonlinear damping in mechanical resonators made from carbon nanotubes and graphene.
TLDR
The damping of mechanical resonators based on carbon nanotubes and graphene sheets is found to strongly depend on the amplitude of motion, and can be described by a nonlinear rather than a linear damping force.
Free-standing epitaxial graphene.
TLDR
Raman spectroscopy suggests that the graphene is not chemically modified during the release of the devices, demonstrating that the technique is a robust means of fabricating large-area suspended graphene structures.
Performance of monolayer graphene nanomechanical resonators with electrical readout.
TLDR
By establishing many of the basic attributes of monolayer graphene resonators, the groundwork for applications of these devices, including high-sensitivity mass detectors, is put in place.
Impermeable atomic membranes from graphene sheets.
TLDR
This pressurized graphene membrane is the world's thinnest balloon and provides a unique separation barrier between 2 distinct regions that is only one atom thick.
A tunable carbon nanotube electromechanical oscillator
TLDR
The electrical actuation and detection of the guitar-string-like oscillation modes of doubly clamped nanotube oscillators are reported and it is shown that the resonance frequency can be widely tuned and that the devices can be used to transduce very small forces.
Electrostatic deflections and electromechanical resonances of carbon nanotubes
TLDR
The methods developed here have been applied to a nanobalance for nanoscopic particles and also to a Kelvin probe based on nanotubes, which indicates a crossover from a uniform elastic mode to an elastic mode that involves wavelike distortions in the nanotube.
Large-scale arrays of single-layer graphene resonators.
TLDR
These measurements show that it is possible to produce large arrays of CVD-grown graphene resonators with reproducible properties and the same excellent electrical and mechanical properties previously reported for exfoliated graphene.
High, size-dependent quality factor in an array of graphene mechanical resonators.
TLDR
These measurements shed light on the mechanisms behind dissipation in monolayer graphene resonators and demonstrate that the quality factor of graphene resonator relative to their thickness is among the highest of any mechanical resonator demonstrated to date.
Radio frequency electrical transduction of graphene mechanical resonators
We report radio frequency (rf) electrical readout of graphene mechanical resonators. The mechanical motion is actuated and detected directly by using a vector network analyzer, employing a local gate
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