Publications by authors named "Roberto Carlos Carillo-Torres"

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[email protected] [email protected] Nanoparticles Synthesized with Rumex hymenosepalus as Antimicrobial Agent.

Nanoscale Res Lett 2021 Jul 22;16(1):118. Epub 2021 Jul 22.

Nanotechnology Graduate Program, Department of Physics, University of Sonora, Rosales and Transversal, 83000, Hermosillo, Sonora, Mexico.

In this work, we used a sequential method of synthesis for gold-silver bimetallic nanoparticles with [email protected] structure ([email protected]). Rumex hymenosepalus root extract (Rh), which presents high content in catechins and stilbenes, was used as reductor agent in nanoparticles synthesis. Size distribution obtained by Transmission Electron Microscopy (TEM) gives a mean diameter of 36 ± 11 nm for [email protected], 24 ± 4 nm for gold nanoparticles (AuNPs), and 13 ± 3 nm for silver nanoparticles (AgNPs). The geometrical shapes of NPs were principally quasi-spherical. The thickness of the silver shell over AuNPs is around 6 nm and covered by active biomolecules onto the surface. Nanoparticles characterization included high angle annular dark field images (HAADF) recorded with a scanning transmission electron microscope (STEM), Energy-Dispersive X-ray Spectroscopy (EDS), X-Ray Diffraction (XRD), UV-Vis Spectroscopy, Zeta Potential, and Dynamic Light Scattering (DLS). Fourier Transform Infrared Spectrometer (FTIR), and X-ray Photoelectron Spectroscopy (XPS) show that nanoparticles are stabilized by extract molecules. A growth kinetics study was performed using the Gompertz model for microorganisms exposed to nanomaterials. The results indicate that AgNPs and [email protected] affect the lag phase and growth rate of Escherichia coli and Candida albicans in a dose-dependent manner, with a better response for [email protected]
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http://dx.doi.org/10.1186/s11671-021-03572-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8298724PMC
July 2021
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