Cysteine-Mediated Green Synthesis of Copper Sulphide Nanoparticles: Biocompatibility Studies and Characterization as Counter Electrodes

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dc.contributor.authorSaona, Luis A.
dc.contributor.authorCampo Giraldo, Jessica L.
dc.contributor.authorAnziani Ostuni, Giovanna
dc.contributor.authorÓrdenes Aenishanslins, Nicolás
dc.contributor.authorVenegas, Felipe A.
dc.contributor.authorGiordana, María F.
dc.contributor.authorDíaz, Carlos
dc.contributor.authorIsaacs, Mauricio
dc.contributor.authorBravo, Denisse
dc.contributor.authorPérez Donoso, José M.
dc.date.accessioned2023-08-24T14:54:19Z
dc.date.available2023-08-24T14:54:19Z
dc.date.issued2022-09
dc.descriptionIndexación: Scopus.es
dc.description.abstractA one-pot green method for aqueous synthesis of fluorescent copper sulphide nanoparticles (NPs) was developed. The reaction was carried out in borax–citrate buffer at physiological pH, 37 °C, aerobic conditions and using Cu (II) and the biological thiol cysteine. NPs exhibit green fluorescence with a peak at 520 nm when excited at 410 nm and an absorbance peak at 410 nm. A size between 8–12 nm was determined by dynamic light scattering and transmission electron microscopy. An interplanar atomic distance of (3.5 ± 0.1) Å and a hexagonal chalcocite crystalline structure (βCh) of Cu2S NPs were also determined (HR-TEM). Furthermore, FTIR analyses revealed a Cu-S bond and the presence of organic molecules on NPs. Regarding toxicity, fluorescent Cu2S NPs display high biocompatibility when tested in cell lines and bacterial strains. Electrocatalytic activity of Cu2S NPs as counter electrodes was evaluated, and the best value of charge transfer resistance (Rct) was obtained with FTO/Cu2S (four layers). Consequently, the performance of biomimetic Cu2S NPs as counter electrodes in photovoltaic devices constructed using different sensitizers (ruthenium dye or CdTe NPs) and electrolytes (S2−/Sn2− or I−/I3−) was successfully checked. Altogether, novel characteristics of copper sulfide NPs such as green, simple, and inexpensive production, spectroscopic properties, high biocompatibility, and particularly their electrochemical performance, validate its use in different biotechnological applications. © 2022 by the authors.es
dc.description.urihttps://www.mdpi.com/2079-4991/12/18/3194
dc.identifier.citationNanomaterials, Volume 12, Issue 18, September 2022, Article number 3194es
dc.identifier.doi10.3390/nano12183194
dc.identifier.issn2079-4991
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/52792
dc.language.isoenes
dc.publisherMDPIes
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectCounter electrodees
dc.subjectCu2S NPses
dc.subjectFluorescent nanoparticleses
dc.subjectGreen synthesises
dc.titleCysteine-Mediated Green Synthesis of Copper Sulphide Nanoparticles: Biocompatibility Studies and Characterization as Counter Electrodeses
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