Book ChapterDOI
Nanoelectromechanical systems (NEMS)
Liviu Nicu,Vaida Auzelyte,Luis Guillermo Villanueva,Nuria Barniol,Francesc Pérez-Murano,Warner J. Venstra,Herre S. J. van der Zant,Gabriel Abadal,Veronica Savu,Jürgen Brugger +9 more
- Vol. 24, pp 203-231
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The Enano Newsletter 24 as discussed by the authors was created on 2013-10-04, modified on 2017-12-07 and published every month since 2013, with the same content.Abstract:
Reference EPFL-REVIEW-189767 URL: http://www.phantomsnet.net/Foundation/Enano_newsletter24.php Record created on 2013-10-04, modified on 2017-12-07read more
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Measurement of the Quantum of Thermal Conductance
Abstract: The physics of mesoscopic electronic systems has been explored for more than 15 years. Mesoscopic phenomena in transport processes occur when the wavelength or the coherence length of the carriers becomes comparable to, or larger than, the sample dimensions. One striking result in this domain is the quantization of electrical conduction, observed in a quasi-one-dimensional constriction formed between reservoirs of two-dimensional electron gas. The conductance of this system is determined by the number of participating quantum states or ‘channels’ within the constriction; in the ideal case, each spin-degenerate channel contributes a quantized unit of 2e2/h to the electrical conductance. It has been speculated that similar behaviour should be observable for thermal transport in mesoscopic phonon systems. But experiments attempted in this regime have so far yielded inconclusive results. Here we report the observation of a quantized limiting value for the thermal conductance, Gth, in suspended insulating nanostructures at very low temperatures. The behaviour we observe is consistent with predictions for phonon transport in a ballistic, one-dimensional channel: at low temperatures, Gth approaches a maximum value of g0 = π2k 2BT/3h, the universal quantum of thermal conductance.
Journal ArticleDOI
New microelectromechanical cavities for gigahertz frequencies
E. G. Kostsov,S. I. Fadeev +1 more
TL;DR: In this article, a thin film of a dielectric (ferroelectric) with a high dielectrics permeability and electric strength is included into the cavity structure, and specific features of device operation and its structure are described by a mathematical model that allows one to find exact relations between the parameters characterizing natural oscillations of the moving element and the triggering voltage.
Journal ArticleDOI
Tuning piezoresistive transduction in nanomechanical resonators by geometrical asymmetries
TL;DR: In this paper, the effect of geometrical asymmetries on the piezoresistive transduction in suspended double clamped beam nanomechanical resonators is investigated.
Journal Article
Sistemas nanoelectromecánicos: origen, aplicaciones y desafíos
TL;DR: In this paper, a revision sobre the sistemas nanoelectromecanicos (NEMS) considerando su origen, sus potenciales aplicaciones and los principales desafios.
Posted Content
Self-oscillations in field emission nanowire mechanical resonators: a nanometric DC-AC conversion
Anthony Ayari,P. Vincent,Sorin Perisanu,M. Choueib,Vincent Gouttenoire,Mikhael Bechelany,David Cornu,Stephen T. Purcell +7 more
TL;DR: In this article, the authors report the observation of self-oscillations in a bottom-up nanoelectromechanical system (NEMS) during field emission driven by a constant applied voltage.
References
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Journal ArticleDOI
Electrostatic deflections and electromechanical resonances of carbon nanotubes
TL;DR: 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.
Journal ArticleDOI
Quantum ground state and single-phonon control of a mechanical resonator
A. D. O’Connell,Max Hofheinz,Markus Ansmann,Radoslaw C. Bialczak,M. Lenander,Erik Lucero,Matthew Neeley,Daniel Sank,Haohua Wang,Martin Weides,James Wenner,John M. Martinis,Andrew Cleland +12 more
TL;DR: This work shows that conventional cryogenic refrigeration can be used to cool a mechanical mode to its quantum ground state by using a microwave-frequency mechanical oscillator—a ‘quantum drum’—coupled to a quantum bit, which is used to measure the quantum state of the resonator.
Journal ArticleDOI
Sideband cooling of micromechanical motion to the quantum ground state
John Teufel,Tobias Donner,Dale Li,Jennifer W. Harlow,Mark Allman,Mark Allman,Katarina Cicak,Adam Sirois,Adam Sirois,Jed D. Whittaker,Jed D. Whittaker,Konrad Lehnert,Raymond W. Simmonds +12 more
TL;DR: Sideband cooling of an approximately 10-MHz micromechanical oscillator to the quantum ground state is demonstrated and the device exhibits strong coupling, allowing coherent exchange of microwave photons and mechanical phonons.
Journal ArticleDOI
A tunable carbon nanotube electromechanical oscillator
TL;DR: 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.
Journal ArticleDOI
Direct-Write Piezoelectric Polymeric Nanogenerator with High Energy Conversion Efficiency
TL;DR: Near-field electrospinning is used to direct-write poly(vinylidene fluoride) nanofibers with in situ mechanical stretch and electrical poling characteristics to produce piezoelectric properties, rendering them potentially advantageous for sensing and actuation applications.