Green synthesis of silver nanostructures with amino acid-modified Pluronic F127 for antibacterial applications

Green synthesis of silver nanostructures with amino acid-modified Pluronic F127 for antibacterial applications

•Multiresistant bacteria can be combated by silver nanoparticles without causing damage to the body.•Pluronic functionalized with amino acids produces nanoparticles in a single step.•Reducing/stabilizing efficiency of the Pluronic F127 and enhanced with functionalization.•The obtained nanoparticles...

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Bibliographic Details
Published in:Applied surface science Vol. 505; p. 144449
Main Authors: Santos, Douglas C., Goes, João M.R., de Souza, Viviane C., Bispo, Diego Fonseca, Otubo, Larissa, Andrade, George R.S., Camargo, Zaine Teixeira, dos Santos, Euler A.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-03-2020
Subjects:
Amino acids
Antibacterial activity
Photoreduction
Pluronic
Silver nanoparticles
AA
D,L-alanine
Amino acids
SNC
PPO
UV–vis
SD
Pluronic
Pluronic F127
SNP
SPR
glycine
ANOVA
FTIR
FWHM
Photoreduction
Antibacterial activity
SNS
PEO
TEM
Silver nanoparticles
c.m.c
L-alanine
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Summary:•Multiresistant bacteria can be combated by silver nanoparticles without causing damage to the body.•Pluronic functionalized with amino acids produces nanoparticles in a single step.•Reducing/stabilizing efficiency of the Pluronic F127 and enhanced with functionalization.•The obtained nanoparticles can be used in the treatment of surfaces without the need for further prior purifications.•The nonstick action of Pluronic may have a synergistic effect on the bactericidal action of silver nanoparticles. The aim of this work was to evaluate the use of amino acid-functionalized Pluronic F127 derivatives in the synthesis of silver nanostructures (SNS), such as nanoparticles (SNP) and nanoclusters (SNC). Herein, glycine, L-alanine, and DL-alanine were used to functionalize poly(ethylene oxide) (PEO) end groups from the polymer chain via an esterification pathway. The esterified polymers were used for reducing and stabilizing SNS by a hydrothermal or a photo-assisted route (using a UVA light). The functionalized polymers were characterized by FTIR and the obtained SNS were characterized by UV–vis spectroscopy and TEM, which showed that the SNS obtained by the hydrothermal route are predominantly spherical, whereas those obtained by photo-assisted method give rise to rods and prisms. Kinetic studies showed that alanine and glycine form particles with different rates and that the different enantiomers (L and DL) influence the size and shape of SNS. The nanoparticles obtained by the two routes had their antibacterial efficiency tested against S. aureus by the Agar well diffusion method.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2019.144449