Charge Sensitivity Enhancement via Mechanical Oscillation in Suspended Carbon Nanotube Devices
Artikel i vetenskaplig tidskrift, 2015

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.

charge sensing

electrometry

nanomechanical resonator

single-walled carbon nanotube

Författare

P. Hakkinen

Aalto-Yliopisto

Andreas Isacsson

Chalmers, Teknisk fysik, Kondenserade materiens teori

A. Savin

Aalto-Yliopisto

J. Sulkko

Aalto-Yliopisto

P Hakonen

Aalto-Yliopisto

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 15 3 1667-1672

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

Europeiska kommissionen (FP7), 2013-10-01 -- 2016-03-31.

Ämneskategorier

Annan teknik

Nanoteknik

DOI

10.1021/nl504282s