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.
Analysis of Dielectric Microbead Detection by Impedance Spectroscopy with Nanoribbons / Scarbolo, Paolo; Accastelli, Enrico; Ernst, Thomas; Guiducci, Carlotta; Selmi, Luca. - ELETTRONICO. - (2016), pp. 947-950. (Intervento presentato al convegno 16th IEEE International Conference on Nanotechnology - IEEE NANO 2016 tenutosi a Sendai, Japan nel 22-25 agosto 2016) [10.1109/NANO.2016.7751538].
Analysis of Dielectric Microbead Detection by Impedance Spectroscopy with Nanoribbons
SELMI, Luca
2016
Abstract
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.File | Dimensione | Formato | |
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