Biocompatible silver nanoparticles prepared with amino acids and a green method

Biocompatible silver nanoparticles prepared with amino acids and a green method

Author de Matos, Ricardo Almeida Autor UNIFESP Google Scholar
Courrol, Lilia Coronato Autor UNIFESP Google Scholar
Abstract The synthesis of nanoparticles is usually carried out by chemical reduction, which is effective but uses many toxic substances, making the process potentially harmful to the environment. Hence, as part of the search for environmentally friendly or green synthetic methods, this study aimed to produce silver nanoparticles (AgNPs) using only AgNO3, Milli-Q water, white light from a xenon lamp (Xe) and amino acids. Nanoparticles were synthetized using 21 amino acids, and the shapes and sizes of the resultant nanoparticles were evaluated. The products were characterized by UV-Vis, zeta potential measurements and transmission electron microscopy. The synthesis of silver nanoparticles with tryptophan and tyrosine, methionine, cystine and histidine was possible through photoreduction method. Spherical nanoparticles were produced, with sizes ranging from 15 to 30 nm. Tryptophan does not require illumination nor heating, and the solution color changes immediately after the mixing of reagents if sodium hydroxide is added to the solution (pH = 10). The Xe illumination acts as sodium hydroxide in the nanoparticles synthesis, releases H+ and allows the reduction of silver ions (Ag+) in metallic silver (Ag-0).
Keywords Amino acid
Light
Nanoparticle
Photoreduction
Silver
Cystine
Histidine
Methionine
Tyrosine
Tryptophan
xmlui.dri2xhtml.METS-1.0.item-coverage Wien
Language English
Sponsor FAPESP
Grant number FAPESP: 2014/06960-9
Date 2017
Published in Amino Acids. Wien, v. 49, n. 2, p. 379-388, 2017.
ISSN 0939-4451 (Sherpa/Romeo, impact factor)
Publisher Springer Wien
Extent 379-388
Origin http://dx.doi.org/10.1007/s00726-016-2371-4
Access rights Closed access
Type Article
Web of Science ID WOS:000395866000015
URI https://repositorio.unifesp.br/handle/11600/55149

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