Synthesis of salt-stable fluorescent nanoparticles (quantum dots) by polyextremophile halophilic bacteria

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dc.contributor.authorBruna, N.
dc.contributor.authorCollao, B.
dc.contributor.authorTello, A.
dc.contributor.authorCaravantes, P.
dc.contributor.authorDíaz-Silva, N.
dc.contributor.authorMonrás, J. P.
dc.contributor.authorÓrdenesAenishanslins, N.
dc.contributor.authorFlores, M.
dc.contributor.authorEspinoza-Gonzalez, R.
dc.contributor.authorBravo, D.
dc.contributor.authorPérez-Donoso, J. M.
dc.date.accessioned2021-11-08T16:54:52Z
dc.date.available2021-11-08T16:54:52Z
dc.date.issued2019-12
dc.descriptionIndexación: Scopuses
dc.description.abstractHere we report the biological synthesis of CdS fluorescent nanoparticles (Quantum Dots, QDs) by polyextremophile halophilic bacteria isolated from Atacama Salt Flat (Chile), Uyuni Salt Flat (Bolivia) and the Dead Sea (Israel). In particular, a Halobacillus sp. DS2, a strain presenting high resistance to NaCl (3–22%), acidic pH (1–4) and cadmium (CdCl 2 MIC: 1,375 mM) was used for QDs biosynthesis studies. Halobacillus sp. synthesize CdS QDs in presence of high NaCl concentrations in a process related with their capacity to generate S 2− in these conditions. Biosynthesized QDs were purified, characterized and their stability at different NaCl concentrations determined. Hexagonal nanoparticles with highly defined structures (hexagonal phase), monodisperse size distribution (2–5 nm) and composed by CdS, NaCl and cysteine were determined by TEM, EDX, HRXPS and FTIR. In addition, QDs biosynthesized by Halobacillus sp. DS2 displayed increased tolerance to NaCl when compared to QDs produced chemically or biosynthesized by non-halophilic bacteria. This is the first report of biological synthesis of salt-stable QDs and confirms the potential of using extremophile microorganisms to produce novel nanoparticles. Obtained results constitute a new alternative to improve QDs properties, and as consequence, to increase their industrial and biomedical applications. © 2019, The Author(s).es
dc.description.urihttps://www-nature-com.recursosbiblioteca.unab.cl/articles/s41598-018-38330-8.pdf
dc.identifier.citationScientific Reports Volume 9, Issue 11 December 2019 Article number 1953es
dc.identifier.doi10.1038/s41598-018-38330-8
dc.identifier.issn2045-2322
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/20794
dc.language.isoenes
dc.publisherNature Publishing Groupes
dc.rights.licenseAtribución 4.0 Internacional (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectCadmium Compoundses
dc.subjectExtremophileses
dc.subjectHalobacilluses
dc.subjectNanoparticleses
dc.subjectQuantum Dotses
dc.subjectSodium Chloridees
dc.subjectSpectrometry, Fluorescencees
dc.subjectSulfideses
dc.titleSynthesis of salt-stable fluorescent nanoparticles (quantum dots) by polyextremophile halophilic bacteriaes
dc.typeArtículoes
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