Nano Archive

Mesoscopic concentration fluctuations in a fluidic nanocavity detected by redox cycling

Zevenbergen, Marcel A. G. and Krapf, Diego and Zuiddam, Marc R. and Lemay, Serge G. (2007) Mesoscopic concentration fluctuations in a fluidic nanocavity detected by redox cycling. NANO LETTERS, 7 (2). pp. 384-388.

[img]
Preview
PDF - Published Version
188Kb

Abstract

We show that a nanofluidic device consisting of a solution-filled cavity bounded by two closely spaced parallel electrodes can amplify the electrical current from redox molecules inside the cavity by a factor of approximately 400 through redox cycling. The noise spectral density of this signal agrees quantitatively with the calculated fluctuations in the number of molecules inside the cavity due to their diffusive motion. We demonstrate sensitivity to fluctuations of as few as approximately 70 molecules.

Item Type:Article
Subjects:Physical Science > Nanophysics
ID Code:6196
Deposited By:IoN
Deposited On:10 Sep 2009 10:29
Last Modified:10 Sep 2009 10:29

Repository Staff Only: item control page