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Title: A low cost and flexible carbon nanotube pH sensor fabricated using aerosol jet technology for live cell applications
Authors: Goh, Guo Liang
Agarwala, Shweta
Tan, Yu Jun
Yeong, Wai Yee
Keywords: Aerosol Jet
pH Sensor
Engineering::Mechanical engineering
Issue Date: 2017
Source: Goh, G. L., Agarwala, S., Tan, Y. J., & Yeong, W. Y. (2018). A low cost and flexible carbon nanotube pH sensor fabricated using aerosol jet technology for live cell applications. Sensors and Actuators B: Chemical, 260, 227-235. doi:10.1016/j.snb.2017.12.127
Series/Report no.: Sensors and Actuators B: Chemical
Abstract: Minute pH changes impact all living organisms, and thus facile pH monitoring in environment and onthe cellular level is important. A low cost and flexible carbon nanotube based pH sensor is fabricated inthis work using Aerosol jet printing technique. The chemiresistive pH sensor is fabricated with a CNT-based miniaturized serpentine sensing element printed on top of the silver electrodes. The trace width ofthe serpentine sensing element is accurately controlled to about the same size as the gaps between thetraces. Aerosol jet parameters are optimized to achieve high resolution printing of 20 m. The fabricatedpH sensor shows good sensitivity (up to 59 k /pH) and repeatability (coefficient of variance <1.15%)with a response time of 20 s the sensor demonstrates excellent biocompatibility required for live cellapplications.
ISSN: 0925-4005
DOI: 10.1016/j.snb.2017.12.127
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: Singapore Centre for 3D Printing 
Rights: © 2017 Elsevier B.V. All rights reserved. This paper was published in Sensors and Actuators B: Chemical and is made available with permission of Elsevier B.V.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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