Analysis of dielectric microbead detection by impedance spectroscopy with nanoribbons

We present a quantitative numerical analysis of dielectric microbead detection experiments with nanoribbons operated in the AC small signal regime. To this purpose, a comprehensive model of nanoribbon operation in electrolyte environment and with DC/AC signals is extended to include the effect of si...

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Bibliographic Details
Published in2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO) pp. 947 - 950
Main Authors Scarbolo, Paolo, Accastelli, Enrico, Ernst, Thomas, Guiducci, Carlotta, Selmi, Luca
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2016
Subjects
Capacitance
Current measurement
Impedance
Nanobioscience
Numerical models
Semiconductor device measurement
Surface impedance
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Summary:We present a quantitative numerical analysis of dielectric microbead detection experiments with nanoribbons operated in the AC small signal regime. To this purpose, a comprehensive model of nanoribbon operation in electrolyte environment and with DC/AC signals is extended to include the effect of site-binding charges in DC, transient and AC conditions. The model is calibrated against DC measurements and pH-transients data from the literature. The impact of the microfluidic chamber size, the interconnects and the site-binding charge is investigated. The calibrated model suggests that the impedance response to micron-sized beads cannot be explained without also taking into account the bead surface charge.
DOI:10.1109/NANO.2016.7751538