Among the plethora of available metal- and metalloid-based nanomaterials (NMs), selenium nanostructures (SeNSs) are one of the most interesting from an applicative perspective due to their intermediate properties between metals and non-metals, as well as their high biocompatibility. In this regard, the capability of microorganisms to biotransform toxic Se-oxyanions – i.e., selenite (SeO32-) and selenate (SeO42-) – into their less bioavailable elemental forms [Se(0)], mostly generating Se nanoparticles (SeNPs), represents as a useful and green alternative over chemogenic synthesis allowing to obtain highly thermodynamically stable NMs. However, their structural characterization, in terms of biomolecules and interactions stabilizing the biogenic colloidal solution, is still a black hole in the microbial nanotechnology field, impairing the exploitation of biogenic SeNP full potential. Here, a parallel characterization between biogenic and chemogenic SeNPs was carried out through Fourier Transform Infrared spectroscopy in Attenuated Total Reflectance (ATR-FTIR) mode, Nuclear Magnetic Resonance (NMR) spectroscopy, and Density Functional Theory (DFT) calculations, to better understand which functional groups, hence biomolecules, contribute the most to the stabilization of biogenic SeNPs.

Elena Piacenza, Alessandro Presentato, Alberto Spinella, Francesco Ferrante, Delia Francesca Chillura Martino (28-31 marzo 2021).Chemogenic versus biogenic synthesis of Selenium nanoparticles: a structural characterization.

Chemogenic versus biogenic synthesis of Selenium nanoparticles: a structural characterization

Elena Piacenza
Conceptualization
;
Alessandro Presentato
Conceptualization
;
Alberto Spinella
Formal Analysis
;
Francesco Ferrante
Formal Analysis
;
Delia Francesca Chillura Martino
Supervision

Abstract

Among the plethora of available metal- and metalloid-based nanomaterials (NMs), selenium nanostructures (SeNSs) are one of the most interesting from an applicative perspective due to their intermediate properties between metals and non-metals, as well as their high biocompatibility. In this regard, the capability of microorganisms to biotransform toxic Se-oxyanions – i.e., selenite (SeO32-) and selenate (SeO42-) – into their less bioavailable elemental forms [Se(0)], mostly generating Se nanoparticles (SeNPs), represents as a useful and green alternative over chemogenic synthesis allowing to obtain highly thermodynamically stable NMs. However, their structural characterization, in terms of biomolecules and interactions stabilizing the biogenic colloidal solution, is still a black hole in the microbial nanotechnology field, impairing the exploitation of biogenic SeNP full potential. Here, a parallel characterization between biogenic and chemogenic SeNPs was carried out through Fourier Transform Infrared spectroscopy in Attenuated Total Reflectance (ATR-FTIR) mode, Nuclear Magnetic Resonance (NMR) spectroscopy, and Density Functional Theory (DFT) calculations, to better understand which functional groups, hence biomolecules, contribute the most to the stabilization of biogenic SeNPs.
Selenium nanoparticles, chemogenic synthesis, biogenic synthesis
Elena Piacenza, Alessandro Presentato, Alberto Spinella, Francesco Ferrante, Delia Francesca Chillura Martino (28-31 marzo 2021).Chemogenic versus biogenic synthesis of Selenium nanoparticles: a structural characterization.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/512247
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