Green Synthesis and Antibacterial Effects of Aqueous Colloidal Solutions of Silver Nanoparticles Using Camomile Terpenoids As a Combined Reducing and Capping Agent

Overview

Journal Bioprocess Biosyst Eng

Specialties Biomedical Engineering
Biotechnology

Date 2016 Apr 17

PMID 27083587

Citations 26

Authors

Magdalena Parlinska-Wojtan

Malgorzata Kus-Liskiewicz

Joanna Depciuch

Omowunmi Sadik

Affiliations

Soon will be listed here.

Abstract

Green synthesis method using camomile extract was applied to synthesize silver nanoparticles to tune their antibacterial properties merging the synergistic effect of camomile and Ag. Scanning transmission electron microscopy revealed that camomile extract (CE) consisted of porous globular nanometer sized structures, which were a perfect support for Ag nanoparticles. The Ag nanoparticles synthesized with the camomile extract (AgNPs/CE) of 7 nm average sizes, were uniformly distributed on the CE support, contrary to the pure Ag nanoparticles synthesized with glucose (AgNPs/G), which were over 50 nm in diameter and strongly agglomerated. The energy dispersive X-ray spectroscopy chemical analysis showed that camomile terpenoids act as a capping and reducing agent being adsorbed on the surface of AgNPs/CE enabling their reduction from Ag(+) and preventing them from agglomeration. Fourier transform infrared and ultraviolet-visible spectroscopy measurements confirmed these findings, as the spectra of AgNPs/CE, compared to pure CE, did not contain the 1109 cm(-1) band, corresponding to -C-O groups of terpenoids and the peaks at 280 and 320 nm, respectively. Antibacterial tests using four bacteria strains showed that the AgNPs/CE performed five times better compared to CE AgNPs/G samples, reducing totally all the bacteria in 2 h.

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