Spectroscopic characterization and high antibacterial activity of silver nanoparticles functionalized Alpaca fibers

Félix-Quintero H.; Jáuregui-Rosas S.R.; Samanamud-Moreno F.V.; Montero-Del Aguila V.; Zavaleta-Espejo G.G.; Saldaña-Jiménez J.A.; Mejía-Uriarte E.V.; Yee-Rendon C.M. · Revista Mexicana de Fisica (2025) · DOI: 10.31349/revmexfis.71.061602

Resumen

Using a simple chemical solution synthesis method, silver nanoparticle-functionalized alpaca fibers were prepared. Special attention was paid to three natural colors of alpaca fibers: white, brown, and black, for the study of absorbance, excitation, emission, Raman, and FTIR spectra. The alpaca fibers at higher silver concentrations exhibited an efficient SERS effect on the melanin molecule, with two bands centered at 1568 and 1336 cm−1. The first band originated from the in-plane stretching of the aromatic rings, and the latter from the linear stretching of the C=C bonds within the rings. This molecule increases antibacterial capacity by enhancing the presence of Ag+ ions. The fibers treated with silver showed excellent antibacterial activity against Escherichia coli ATCC 25922. Copyright (c) 2025 H. Félix-Quintero, S. R. Jáuregui-Rosas, F. V. Samanamud-Moreno, V. Montero-Del Aguila, G. G. Zavaleta-Espejo, J. A. Saldaña-Jiménez, E. V. Mejía-Uriarte, C. M. Yee-Rendon. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Instituciones: Universidad Nacional de Trujillo