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Article

Development and Characterization of Integrated Nano-Sensors for Organic Residues and pH Field Detection

1
Department of Water Industry Engineering, Kinneret Academic College, Zemach 15132, Israel
2
Institute of Agricultural Engineering, ARO, The Volcani Center, Bet Dagan 7505101, Israel
*
Author to whom correspondence should be addressed.
Academic Editor: Dimitris Tsoukalas
Sensors 2021, 21(17), 5842; https://doi.org/10.3390/s21175842
Received: 8 August 2021 / Revised: 24 August 2021 / Accepted: 27 August 2021 / Published: 30 August 2021
(This article belongs to the Special Issue Application of Thin Film Materials in Sensors)
Meeting global water quality standards is a real challenge to ensure that food crops and livestock are fit for consumption, as well as for human health in general. A major hurdle affecting the detection of pollutants in water reservoirs is the lapse of time between the sampling moment and the availability of the laboratory-based results. Here, we report the preparation, characterization, and performance assessment of an innovative sensor for the rapid detection of organic residue levels and pH in water samples. The sensor is based on carbonaceous nanomaterials (CNMs) coated with an intrinsically conductive polymer, polyaniline (PANI). Inverse emulsion polymerizations of aniline in the presence of carbon nanotubes (CNTs) or graphene were prepared and confirmed by thermogravimetric analysis and high-resolution scanning electron microscopy. Aminophenol and phenol were used as proxies for organic residue detection. The PANI/CNM nanocomposites were used to fabricate thin-film sensors. Of all the CNMs, the smallest limit of detection (LOD) was achieved for multi-walled CNT (MWCNT) with a LOD of 9.6 ppb for aminophenol and a very high linearity of 0.997, with an average sensitivity of 2.3 kΩ/pH at an acid pH. This high sensor performance can be attributed to the high homogeneity of the PANI coating on the MWCNT surface. View Full-Text
Keywords: polyaniline; carbon-based nanocomposites; sensor; pH levels; organic residues polyaniline; carbon-based nanocomposites; sensor; pH levels; organic residues
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MDPI and ACS Style

Chajanovsky, I.; Cohen, S.; Shtenberg, G.; Suckeveriene, R.Y. Development and Characterization of Integrated Nano-Sensors for Organic Residues and pH Field Detection. Sensors 2021, 21, 5842. https://doi.org/10.3390/s21175842

AMA Style

Chajanovsky I, Cohen S, Shtenberg G, Suckeveriene RY. Development and Characterization of Integrated Nano-Sensors for Organic Residues and pH Field Detection. Sensors. 2021; 21(17):5842. https://doi.org/10.3390/s21175842

Chicago/Turabian Style

Chajanovsky, Itamar, Sarah Cohen, Giorgi Shtenberg, and Ran Yosef Suckeveriene. 2021. "Development and Characterization of Integrated Nano-Sensors for Organic Residues and pH Field Detection" Sensors 21, no. 17: 5842. https://doi.org/10.3390/s21175842

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