Conductive-carbon-black filled PDMS chemiresistor sensor for the detection of volatile organic compounds

Author

Wang, Jian ; Feng, Bo ; Wu, Wengang

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Micro/Nano Fabrication, Peking Univ., Beijing, China

fYear

2011

fDate

20-23 Feb. 2011

Firstpage

449

Lastpage

452

Abstract

We present the conductive-carbon-black filled PDMS (polydimethylsiloxane) composite as the sensing material for the detection of volatile organic compounds (cyclohexane and isopropanol). The sensing composite film is immobilized on the interdigitated gold microelectrode pairs. The resistance change ratios with the organic compounds vapors have been examined. The measurement results show that the outputs of the sensor as a function of the concentrations of the organic compound vapors are linear, and the sensitivities of the sensor to the vapors are up to 2.78×10^-7 ppm^-1 for cyclohexane and 2.37×10^-7 ppm^-1 for isopropanol at room temperature. The response/recovery time is 3.5 s and 1.5 s for cyclohexane, 1.0 s and 1.5 s for isopropanol, respectively.

Keywords

carbon; gas sensors; polymers; resistors; thin film sensors; C; PDMS; chemiresistor sensor; composite film; conductive carbon black; cyclohexane; isopropanol; time 1.0 s; time 1.5 s; time 3.5 s; volatile organic compounds detection; Carbon; Microelectrodes; Plastics; Resistance; Sensitivity; Temperature sensors; Time factors; Chemireistor sensor; Conductive-Carbon-Black Filled PDMS; Volatile Organic Compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Nano/Micro Engineered and Molecular Systems (NEMS), 2011 IEEE International Conference on

Conference_Location

Kaohsiung

Print_ISBN

978-1-61284-775-7

Type

conf

DOI

10.1109/NEMS.2011.6017389

Filename

6017389