Effectiveness of Snail Slime in the Green Synthesis of Silver Nanoparticles

The development of green, low cost and sustainable synthetic routes to produce metal nanoparticles is of outmost importance, as these materials fulfill large scale applications in a number of different areas. Herein, snail slime extracted from Helix Aspersa snails was successfully employed both as b...

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Published inNanomaterials (Basel, Switzerland) Vol. 12; no. 19; p. 3447
Main Authors Di Filippo, Maria Francesca, Di Matteo, Valentina, Dolci, Luisa Stella, Albertini, Beatrice, Ballarin, Barbara, Cassani, Maria Cristina, Passerini, Nadia, Gentilomi, Giovanna Angela, Bonvicini, Francesca, Panzavolta, Silvia
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.10.2022
MDPI
Subjects
antibacterial activity
Antimicrobial agents
biogenic pathway
Diameters
Effectiveness
Glycoproteins
Gram-negative bacteria
green synthesis
Hemodialysis
Infrared spectra
Macromolecules
Mollusks
Nanomaterials
Nanoparticles
Proteins
Reducing agents
Room temperature
Silver
Silver industry
silver nanoparticles
Silver nitrate
Slime
snail slime
Snails
Spectrum analysis
Synthesis
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Summary:The development of green, low cost and sustainable synthetic routes to produce metal nanoparticles is of outmost importance, as these materials fulfill large scale applications in a number of different areas. Herein, snail slime extracted from Helix Aspersa snails was successfully employed both as bio-reducing agent of silver nitrate and as bio-stabilizer of the obtained nanoparticles. Several trials were carried out by varying temperature, the volume of snail slime and the silver nitrate concentration to find the best biogenic pathway to produce silver nanoparticles. The best results were obtained when the synthesis was performed at room temperature and neutral pH. UV–Visible Spectroscopy, SEM-TEM and FTIR were used for a detailed characterization of the nanoparticles. The obtained nanoparticles are spherical, with mean diameters measured from TEM images ranging from 15 to 30 nm and stable over time. The role of proteins and glycoproteins in the biogenic production of silver nanoparticles was elucidated. Infrared spectra clearly showed the presence of proteins all around the silver core. The macromolecular shell is also responsible of the effectiveness of the synthesized AgNPs to inhibit Gram positive and Gram negative bacterial growth.
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ISSN:2079-4991
2079-4991
DOI:10.3390/nano12193447