Biocompatible silver nanoparticles prepared with amino acids and a green method

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...

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Bibliographic Details
Published in:Amino acids 2017-02, Vol.49 (2), p.379-388
Main Authors: de Matos, Ricardo Almeida, Courrol, Lilia Coronato
Format: Article
Language:English
Subjects:
Amino Acids - chemistry
Analytical Chemistry
Biochemical Engineering
Biochemistry
Biocompatible Materials - chemical synthesis
Biocompatible Materials - chemistry
Biomedical and Life Sciences
Green Chemistry Technology - methods
Hydrogen-Ion Concentration
Life Sciences
Metal Nanoparticles - chemistry
Microscopy, Electron, Transmission
Neurobiology
Original Article
Proteomics
Silver - chemistry
Silver Nitrate - chemistry
Spectrophotometry, Ultraviolet
Temperature
Tryptophan - chemistry
Xenon
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Summary: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 AgNO 3 , 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 ).
ISSN:0939-4451
1438-2199
DOI:10.1007/s00726-016-2371-4