Silver nanoparticles from leafy green extract of Belgian endive (Cichorium intybus L. var. sativus): Biosynthesis, characterization, and antibacterial activity

GALLUCCI, M. NICOLÁS; FRAIRE, JUAN C.; FERREYRA MAILLARD, ANIKE P.V.; PÁEZ, PAULINA L.; AIASSA MARTÍNEZ, IVANA M.; PANNUNZIO MINER, ELISA V.; CORONADO, EDUARDO A.; DALMASSO, PABLO R.

MATERIALS LETTERS

ELSEVIER SCIENCE BV

Año: 2017 vol. 197 p. 98 - 98

0167-577X

e report for the first time a green, simple, and low-cost synthesis of silver nanoparticles (AgNPs) by mixing AgNO3 solution with the aqueous leaf extract of Belgian endive, a variety of Cichorium intybus L., without any harmful reducing and capping agents. The biosynthesis of AgNPs was observed by the color charge from colorless (metal salt solution) to a yellowish brown (nanoparticle colloidal dispersion), which was confirmed by UV?vis spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD). UV?vis spectra showed the surface plasmon resonance signature of AgNPs around 420 nm, TEM revealed that nanoparticles were quasi-spherical with an average diameter ranging from 19 to 64 nm depending on the metal salt concentration, and XRD pattern indicated that the biosynthetic process produced face-centered cubic AgNPs. Surface-enhanced Raman spectroscopy analysis showed that the AgNPs were capped with bioactive molecules from the leaf extract, which are also believed