Title :
A disposable polymer field effect transistor (FET) for pH measurement
Author :
Chuan Gao ; Xiaoshan Zhu ; Jin-Woo Choi ; Ahn, C.H.
Author_Institution :
Dept. of Electr. & Comput. Eng. & Comput. Sci., Cincinnati Univ., OH, USA
Abstract :
In this paper, a fully disposable polymer field effect transistor (polymer-FET) for pH measurement has been proposed, fabricated and fully characterized. A well-defined poly (3-hexylthiophene) (P3HT) is adopted as the semi-conducting material and used as active layer. The polymer FET fabricated on a plastic substrate shows I-V characteristics that are comparable to those of Si-based field effect transistor (Si-FET). The polymer FET sensor has been integrated with a microfluidic channel and tested as a pH sensor, which shows a good linearity in the source-drain current versus the pH concentration. This work has envisaged a possibility of mass-producing low cost and disposable polymer sensors/circuits. Due to the low temperature process, the polymer-FET can be easily integrated with disposable lab-on-a-chips.
Keywords :
chemical sensors; insulated gate field effect transistors; microfluidics; microsensors; organic semiconductors; pH measurement; polymers; P3HT; Si-based field effect transistor; active layer; disposable lab-on-a-chips; disposable polymer field effect transistor; disposable polymer sensors/circuits; linearity; mass-producing low cost; microfluidic channel; pH measurement; plastic substrate; polymer-FET sensor; semiconducting material; source-drain current; well-defined poly (3-hexylthiophene); Circuit testing; Costs; FETs; Lab-on-a-chip; Linearity; Microfluidics; Plastics; Polymers; Sensor phenomena and characterization; Temperature sensors;
Conference_Titel :
TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7731-1
DOI :
10.1109/SENSOR.2003.1216980
