Label free, electrochemical detection of atrazine using electrospun Mn2O3 nanofibers: Towards ultrasensitive small molecule detection

Supraja, Patta and Tripathy, Suryasnata and Vanjari, Siva Rama Krishna and Singh, Vikrant and Singh, Shiv Govind (2019) Label free, electrochemical detection of atrazine using electrospun Mn2O3 nanofibers: Towards ultrasensitive small molecule detection. Sensors and Actuators B: Chemical, 285. pp. 317-325. ISSN 0925-4005

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Abstract

Atrazine, a pesticide of chloro-triazine family and a class 3a carcinogen, is known to severely affect human endocrine system. In light of its detrimental environmental effects, ensuring its easy and ultrasensitive detection is highly essential. In this paper, we demonstrate facile and label free electrochemical detection of atrazine, using electrospun manganese oxide nanofibers (MNF). Here, we report an anti-atrazine-antibody based immunosensor, based on low bandgap Mn2O3 nanofibers, for ultrasensitive and highly selective detection of atrazine. The electrospun nanofibers used in this work were characterized using field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) analysis, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and UV–vis Spectroscopy. The proposed platform was able to detect atrazine in the concentration range of 10−21 g/mL, which in comparison to the previously reported atrazine sensors is a fairly superior performance. The observed lower limit of detection (LOD) was 0.22 × 10−21 g/mL, with a sensitivity of 52.54 (kΩ/μg mL−1)/cm2. We have also demonstrated atrazine detection in spiked water samples, so as to demonstrate that the proposed platform is suitable for real-time applications. Furthermore, the sensing platform is label free, comprising of a simple protocol and hence is facile in nature.

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IITH Creators:
IITH CreatorsORCiD
Vanjari, Siva Rama KrishnaUNSPECIFIED
Singh, Shiv Govindhttp://orcid.org/0000-0001-7319-879X
Item Type: Article
Uncontrolled Keywords: Atrazine, Mn2O3 nanofiber, Electrospinning, Water testing, Label free, Electrochemical
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 21 Jan 2019 04:27
Last Modified: 21 Jan 2019 04:27
URI: http://raiith.iith.ac.in/id/eprint/4734
Publisher URL: http://doi.org/10.1016/j.snb.2019.01.060
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