TY - JOUR
T1 - IoT-based laser-inscribed sensors for detection of sulfate in water bodies
AU - He, Shan
AU - Feng, Shilun
AU - Nag, Anindya
AU - Afsarimanesh, Nasrin
AU - E Alahi, Md Eshrat
AU - Li, Siying
AU - Mukhopadhyay, S.C.
AU - Wong, Jonathan Woon Chung
N1 - KAUST Repository Item: Exported on 2021-01-12
Acknowledgements: This work was supported in part by the National Natural Science Fund from the National Science Foundation of China (NSFC) under
Grant 61950410613, and in part by the CAS President International Fellowship Initiative from the Chinese Academy of Sciences under
Grant 2019PT0008.
PY - 2020
Y1 - 2020
N2 - This paper presents the fabrication of novel flexible sensors from metalized polymer films and their subsequent utilization for environmental applications. Polyethylene terephthalate films coated with thin-film of aluminum was used as a singular material to form the sensor patches. Optimization was done on the laser parameters to form laser-inscribed interdigitated electrodes on the aluminum side of the polymer films. The sensors were then used to detect the presence of sulfate ions in the water samples. Electrochemical impedance spectroscopy was used to detect the resistive and reactive changes with respect to the corresponding changes in the concentration of the tested solutions. Experiments were conducted using five different concentrations ranging between 0.1 ppm and 1000 ppm. The sensitivity, limit of detection and response time of the salts were 0.874 Ω/ppm, 0.1 ppm and one second, respectively. The repeatability of the sensors was also tested to validate their responses for the target analyte. An optimal frequency was chosen to form an IoT-based system that consisted of an impedance analyzer AD 5933, Wi-Fi embedded Arduino and 2:1 multiplexer ADG849. The interfacing of the microcontroller-sensed data was also done with the cloud server to showcase the potentiality of the developed systems as portable devices for real-time applications.
AB - This paper presents the fabrication of novel flexible sensors from metalized polymer films and their subsequent utilization for environmental applications. Polyethylene terephthalate films coated with thin-film of aluminum was used as a singular material to form the sensor patches. Optimization was done on the laser parameters to form laser-inscribed interdigitated electrodes on the aluminum side of the polymer films. The sensors were then used to detect the presence of sulfate ions in the water samples. Electrochemical impedance spectroscopy was used to detect the resistive and reactive changes with respect to the corresponding changes in the concentration of the tested solutions. Experiments were conducted using five different concentrations ranging between 0.1 ppm and 1000 ppm. The sensitivity, limit of detection and response time of the salts were 0.874 Ω/ppm, 0.1 ppm and one second, respectively. The repeatability of the sensors was also tested to validate their responses for the target analyte. An optimal frequency was chosen to form an IoT-based system that consisted of an impedance analyzer AD 5933, Wi-Fi embedded Arduino and 2:1 multiplexer ADG849. The interfacing of the microcontroller-sensed data was also done with the cloud server to showcase the potentiality of the developed systems as portable devices for real-time applications.
UR - http://hdl.handle.net/10754/666859
UR - https://ieeexplore.ieee.org/document/9303477/
UR - http://www.scopus.com/inward/record.url?scp=85098781656&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2020.3046656
DO - 10.1109/ACCESS.2020.3046656
M3 - Article
SN - 2169-3536
VL - 8
SP - 228879
EP - 228890
JO - IEEE Access
JF - IEEE Access
ER -