Author:
Sangaonkar Geetanjali M.,Desai Megha P.,Dongale Tukaram D.,Pawar Kiran D.
Abstract
AbstractPresently, nanotechnology is being foreseen to play an important role in developing analytical assays for the detection of pollutants like mercury (Hg2+). In this study, Kokum fruit mediated silver nanoparticles (AgNPs) were differentially centrifuged to prepare anionic, monodispersed AgNPs to develop a highly sensitive, colorimetric and memristor-based assay for detection of Hg2+ in water samples. The investigation of the highly selective reaction between AgNPs and Hg2+ using HAADF-STEM images and EDS spectrum indicated the amalgam formation through etching and under potential deposition which resulted in a visible color change from brown to colorless, change in SPR intensity and also change in memristive switching like property of AgNPs. The developed colorimetric assay detected Hg2+ with a limit of detection (LOD) of 6.2 ppb and limit of quantification (LOQ) of 18.9 ppb and, quantitatively recovered Hg2+ with good accuracy and precision (RSD < 2%). Further, the test of memristive switching like property of AgNPs demonstrated frequency-dependent shrinkage of I–V hysteresis loop indicating memristive switching like property. The test of the sensitivity of Hg2+ detection was estimated to be 8.7 ppb as the LOD and 26.4 ppb as LOQ. Like the colorimetric assay, the memristor-based assay also recovered Hg2+ with good accuracy and precision.
Publisher
Springer Science and Business Media LLC
Reference41 articles.
1. Cotton, F. A., Wilkinson, G., Murillo, C. A. & Bochmann, M. Advanced Inorganic Chemistry. Advanced Inorganic Chemistry, 6th ed., John Wiley & Sons, New York (1999).
2. Li, L., Feng, D., Fang, X., GHan, Z. & Yuzhong, X. Visual sensing of Hg2+ using unmodified Au@Ag core-shell nanoparticles. J. Nanostruct. Chem. 4, 1–8 (2014).
3. Wang, Q., Kim, D., Dionysiou, D., Sorial, G. & Timberlake, D. Sources and remediation for mercury contamination in aquatic systems—a literature review. Environ. Pollut. 131, 323–336 (2004).
4. Chai, F., Wang, C. G., Wang, T. T., Ma, Z. F. & Su, Z. L-cysteine functionalized gold nanoparticles for the colorimetric detection of Hg2+ induced by ultraviolet light. Nanotechnology 21, 025501–025506 (2010).
5. Farhadi, K., Forough, M., Molaei, R., Hajizadeh, S. & Rafipour, A. Sensors and Actuators B: Chemical Highly selective Hg 2 + colorimetric sensor using green synthesized and unmodified silver nanoparticles. Sensors & Actuators: B Chemical 161, 880–885 (2012).
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