Suppression of a Brownian noise in a hole-type sensor due to induced-charge electro-osmosis

Noise reduction is essential for a single molecular sensor. Thus, we propose a novel noise reduction mechanism using a hydrodynamic force due to induced-charge electro-osmosis (ICEO) in a hole-type sensor and numerically examine the performance. By the boundary element method that considers both a B...

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Bibliographic Details
Published inPhysics of fluids (1994) Vol. 28; no. 3
Main Author Sugioka, Hideyuki
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.03.2016
Subjects
Boundary element method
Brownian motion
Electrical noise
Electroosmosis
Fluid dynamics
Mathematical models
Noise
Noise reduction
Physics
Sensors
Threshold voltage
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Summary:Noise reduction is essential for a single molecular sensor. Thus, we propose a novel noise reduction mechanism using a hydrodynamic force due to induced-charge electro-osmosis (ICEO) in a hole-type sensor and numerically examine the performance. By the boundary element method that considers both a Brownian motion and an ICEO flow of a polarizable particle, we find that the Brownian noise in a current signal is suppressed significantly in a converging channel because of the ICEO flow around the particle in the presence of an electric field. Further, we propose a simple model that explains a numerically obtained threshold voltage of the suppression of the Brownian noise due to ICEO. We believe that our findings contribute greatly to developments of a single molecular sensor.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.4943495