A charge based sigma delta capacitive sensor for ultrathin polyelectrolyte layer detection

Author

Ghafar-Zadeh, Ebrahim ; Sawan, Mohamad

Author_Institution

Dept. of Electr. Eng., Polystim Neurotechnologies Lab., Montreal, QC

fYear

2008

fDate

22-25 June 2008

Firstpage

45

Lastpage

48

Abstract

In this paper, we present a hybrid microfluidic/CMOS sensor for lab-on-chip (LoC) applications. This hybrid device features a sigma delta (SigmaDelta) capacitive sensor implemented through 0.18 mum CMOS process, a direct-write microfluidic channel and ultrathin polyelectrolyte layers (PLs). We demonstrate the simulation and experimental results and show the viability of the proposed sensor for molecular detection purposes using chitosan and alginate solutions.

Keywords

CMOS integrated circuits; capacitive sensors; flow sensors; microfluidics; polymer electrolytes; alginate solution; charge based sigma delta capacitive sensor; chitosan solution; direct-write microfluidic channel; hybrid microfluidic-CMOS sensor; lab-on-chip applications; molecular detection purposes; ultrathin polyelectrolyte layer detection; Capacitance; Capacitive sensors; Circuits; DNA; Delta-sigma modulation; Dielectrics; Electrodes; Lab-on-a-chip; Microfluidics; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems and TAISA Conference, 2008. NEWCAS-TAISA 2008. 2008 Joint 6th International IEEE Northeast Workshop on

Conference_Location

Montreal, QC

Print_ISBN

978-1-4244-2331-6

Electronic_ISBN

978-1-4244-2332-3

Type

conf

DOI

10.1109/NEWCAS.2008.4606317

Filename

4606317