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Article

Laser-Based Synthesis of Au Nanoparticles for Optical Sensing of Glyphosate: A Preliminary Study

1
CNR-IMM (Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e i Microsistemi) via S. Sofia 64, 95123 Catania, Italy
2
Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università di Catania, via S. Sofia 64, 95123 Catania, Italy
3
Dipartimento di Scienze Chimiche, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(11), 989; https://doi.org/10.3390/mi11110989
Received: 1 October 2020 / Revised: 25 October 2020 / Accepted: 31 October 2020 / Published: 31 October 2020
(This article belongs to the Special Issue Metal Nanomaterials-Based Sensors)
Nowadays, Au nanoparticles (AuNPs) capture great interest due to their chemical stability, optical properties, and biocompatibility. The success of technologies based on the use of AuNPs implies the development of simple synthesis methods allowing, also, the fine control over their properties (shape, sizes, structure). Here, we present the AuNPs fabrication by nanosecond pulsed laser ablation in citrate-solution, that has the advantage of being a simple, economic and eco-sustainable method to fabricate colloidal solutions of NPs. We characterized the stability and the absorbance of the solutions by Ultraviolet-Visible (UV-Vis) spectroscopy and the morphology of the AuNPs by Transmission Electron Microscopy. In addition, we used the AuNPs solutions as colorimetric sensor to detect the amount of glyphosate in liquid. Indeed, glyphosate is one of the most widely used herbicides which intensive use represents a risk to human health. The glyphosate presence in the colloidal AuNPs solutions determines the aggregation of the AuNPs causing the change in the color of the solution. The variation of the optical properties of the colloidal solutions versus the concentration of glyphosate is studied. View Full-Text
Keywords: glyphosate; pulsed laser ablation; gold nanoparticles; colorimetry; optical sensing glyphosate; pulsed laser ablation; gold nanoparticles; colorimetry; optical sensing
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MDPI and ACS Style

Sortino, A.L.; Censabella, M.; Munzi, G.; Boninelli, S.; Privitera, V.; Ruffino, F. Laser-Based Synthesis of Au Nanoparticles for Optical Sensing of Glyphosate: A Preliminary Study. Micromachines 2020, 11, 989. https://doi.org/10.3390/mi11110989

AMA Style

Sortino AL, Censabella M, Munzi G, Boninelli S, Privitera V, Ruffino F. Laser-Based Synthesis of Au Nanoparticles for Optical Sensing of Glyphosate: A Preliminary Study. Micromachines. 2020; 11(11):989. https://doi.org/10.3390/mi11110989

Chicago/Turabian Style

Sortino, Antonella L., Maria Censabella, Gabriella Munzi, Simona Boninelli, Vittorio Privitera, and Francesco Ruffino. 2020. "Laser-Based Synthesis of Au Nanoparticles for Optical Sensing of Glyphosate: A Preliminary Study" Micromachines 11, no. 11: 989. https://doi.org/10.3390/mi11110989

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