Surface plasmon resonance characterization of virgin coconut oil biodiesel: Detection of iron corrosion using polypyrrole chitosan sensing layer
- A. Sadrolhosseini, M. M. Moksin, W.M.M. Yunus, Z. A. Talib
- Sensors and materials,
Article history: Received 31 October 2016 Received in revised form 15 December 2016 Accepted 5 February 2017 This paper presents the design and fabrication of a proximity coupled feed disk resonator coated with multi walled carbon nanotubes (MWCNTs) and polypyrrolechitosan (PPy-CHI) layers as a napropamide sensor. Computer Simulation Technology (CST) microwave studio was used to obtain the best design of the disk resonator and feed line position in a 5 GHz resonant frequency. Also, MWCNTs-PPy-CHI layers were coated on the disk resonator using electric field deposition, and the chemical interaction between the sensing layer and napropamide was investigated via a Fourier transform infrared spectroscopy (FTIR). The evaluation of the system was performed using different concentrations of commercial napropamide and pure napropamide at room temperature (25 C). The experimental results proved that the proximity coupled feed disk resonator that was coated with MWCNTs-PPy-CHI layers was simple, fast (Measurementtime=5 seconds), accurate (as low as 0.1 ppm), and low cost; it also has the potential to be produced as a portable instrumentation system for detecting napropamide in water and soil.