Investigation on optimizing the performance of conductance-based CNTs chemical sensors

Author

Ouyang, Mengxing ; Zhang, Yu ; Li, Wen J.

Author_Institution

Dept. of Mech. & Autom. Eng., Chinese Univ. of Hong Kong, Hong Kong, China

fYear

2010

fDate

12-15 Oct. 2010

Firstpage

207

Lastpage

211

Abstract

Signal-to-Noise Ratio (SNR) is a very essential parameter in determining a sensor´s performance and ultimate resolution limit. For conductance-based CNTs chemical sensors, how to increase the response and suppress the noise is a critical issue in optimizing the sensor performance. In this paper, we discuss our experiments performed on conductance-based CNTs sensors, which were fabricated by DEP manipulation, to determine their response while using various activating current (e.g., 50nA-250μA), as well as under different ambient temperatures. The I-V characteristics, Temperature Coefficient of Resistance (TCR), and sensor response were discussed in detail. Also, we studied the relationship between SNR and activating current using different parameters, such as ambient temperature, various types of CNTs, as well as different CNTs sensor substrates.

Keywords

carbon nanotubes; chemical sensors; temperature sensors; DEP manipulation; conductance-based CNT chemical sensors; noise suppression; resistance temperature coefficient; sensor response; sensor substrates; signal-to-noise ratio; ultimate resolution limit; Carbon nanotubes; Chemical sensors; Resistance; Signal to noise ratio; Substrates; Temperature sensors; CNTs Sensor; Carbon Nanotubes; Signal to Noise Ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology Materials and Devices Conference (NMDC), 2010 IEEE

Conference_Location

Monterey, CA

Print_ISBN

978-1-4244-8896-4

Type

conf

DOI

10.1109/NMDC.2010.5651960

Filename

5651960