Abstract
The preparation of Imidacloprid (IMC) Nanoribbons by laser induced simultaneous fragmentation and exfoliation of micrometer sized IMC powders suspended in water is reported. Samples were prepared varying both the laser fluence and quantity of IMC powder. The prepared nanostructures were characterized by transmission electron microscopy (TEM), Raman spectroscopy and X-Ray Photoelectron Spectroscopy (XPS). TEM characterization showed that nearly spherical nanoparticles were obtained at the lowest fluence whereas at the highest fluence, IMC nanoribbons (IMCNR) with widths from 500 to 1000 nm and thickness of few atomic layers were obtained. Raman Spectroscopy showed the vibrational features of imidacloprid revealing that this organic molecule was preserved after laser irradiation. The XPS characterization confirms and supports the Raman results revealing that the nanoribbons were formed by the IMC organic molecule. The toxicity evaluation showed that IMCNR caused a more accelerated mortality of Drosophila melanogaster than the same dose of IMC.
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