Characteristics of the PPy Material as pH Sensitive Membrane

Author

Wang, Zumin ; Ren, Zhengxin ; Han, Jinghong ; Bian, Chao ; Xia, Shanhong

Author_Institution

State Key Lab. of Transducer Technol., CAS, Beijing

fYear

2007

fDate

16-19 Jan. 2007

Firstpage

377

Lastpage

381

Abstract

A monolithic pH sensor system has been studied and developed, based on standard CMOS technology. The micro system includes an on-chip integration of differential ISFET/REFET sensing devices, metal constructed pseudo reference electrode (PRE) and their relative signal processing circuits. We mainly present the development of PPy(polypyrrole) membrane by the way of electrochemical polymerization, which was grown on the gate of ISFET, as pH sensitive material. With a series of experiments, a high sensitivity of 56mV/pH was achieved within the pH range from 1 to 12. In the end, we discussed the influence of reagents and polymerization parameters on the pH sensor system.

Keywords

chemical sensors; pH measurement; polymerisation; CMOS technology; electrochemical polymerization; ion sensitive field effect transistor; monolithic pH sensor system; pH sensitive membrane; polypyrrole; pseudo reference electrode; signal processing circuits; Biological materials; Biomembranes; CMOS process; CMOS technology; Circuits; Content addressable storage; Electrodes; FETs; Polymers; Sensor systems; Polypyrrole; ion sensitive field effect transistor; pH sensitive membrane;

fLanguage

English

Publisher

ieee

Conference_Titel

Nano/Micro Engineered and Molecular Systems, 2007. NEMS '07. 2nd IEEE International Conference on

Conference_Location

Bangkok

Print_ISBN

1-4244-0610-2

Type

conf

DOI

10.1109/NEMS.2007.352039

Filename

4160342