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Charge Sensitivity Enhancement via Mechanical Oscillation in Suspended Carbon Nanotube Devices

P. Hakkinen ; Andreas Isacsson (Institutionen för teknisk fysik, Kondenserade materiens teori) ; A. Savin ; J. Sulkko ; P. Hakonen
Nano Letters (1530-6984). Vol. 15 (2015), 3, p. 1667-1672.
[Artikel, refereegranskad vetenskaplig]

Single electron transistors (SETs) fabricated from single-walled carbon nanotubes (SWNTs) can be operated as highly sensitive charge detectors reaching sensitivity levels comparable to metallic radio frequency SETs (rf-SETs). Here, we demonstrate how the charge sensitivity of the device can be improved by using the mechanical oscillations of a single-walled carbon nanotube quantum dot. To optimize the charge sensitivity dQ, we drive the mechanical resonator far into the nonlinear regime and bias it to an operating point where the mechanical third order nonlinearity is canceled out. This way we enhance dQ, from 6 mu e/(Hz)(1/2) for the static case to 0.97 mu e/(Hz)(1/2) at a probe frequency of similar to 1.3 kHz.

Nyckelord: electrometry, charge sensing, single-walled carbon nanotube, nanomechanical resonator



Denna post skapades 2015-04-22. Senast ändrad 2015-07-07.
CPL Pubid: 215566

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Nanoteknik
Teknisk fysik

Chalmers infrastruktur

 


Projekt

Denna publikation är ett resultat av följande projekt:


Graphene-Based Revolutions in ICT And Beyond (GRAPHENE) (EC/FP7/604391)