AI Article Synopsis
- The study explores how three antibiotics (levofloxacin, tetracycline, and benzylpenicillin) adsorb onto silver nanoparticles using techniques like surface-enhanced Raman scattering (SERS) and UV-VIS-NIR spectroscopy.
- The researchers used DFT calculations to create theoretical models of the antibiotics for analyzing their vibrational properties and identifying how they bind to the nanoparticles.
- The findings indicate the specific functional groups involved in the adsorption for each antibiotic: levofloxacin binds via its carboxylate group, tetracycline through its carbonyl group, and benzylpenicillin via carbonyl moieties from both its carboxylate and amide structures.
Article Abstract
In this work the adsorption of the antibiotics levofloxacin (LV), tetracycline (TC) and benzylpenicillin (BP) on the surface of silver nanoparticles (AgNP) have been investigated through both surface-enhanced Raman scattering (SERS) and UV-VIS-NIR spectroscopies. The SERS spectra were obtained using 1064 nm exciting radiation. Theoretical models for the antibiotic molecules were obtained from DFT calculations, and used in the vibrational assignment. The adsorption geometries were proposed based on the changes in the spectral patterns. The LV compound adsorbs through carboxylate group, TC compound interacts with silver atoms through carbonyl from intermediate ring, and BP compound adsorbs by carbonyl moieties from carboxylate and acyclic amide.
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| http://dx.doi.org/10.1016/j.saa.2014.09.120 | DOI Listing |
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