Two-dimensional synthesis of silver nanoparticle in situ Langmuir films from the reduction of silver sulfadiazine

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dc.contributor.authorAssis, D. R. [UNESP]
dc.contributor.authorUeyama, V. N. [UNESP]
dc.contributor.authorSantos, C. C. [UNESP]
dc.contributor.authorDavolos, M. R. [UNESP]
dc.contributor.authorJafelicci, M. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-05-01T13:41:33Z
dc.date.available2022-05-01T13:41:33Z
dc.date.issued2022-03-31
dc.description.abstractTwo–dimensional (2D) arrangement of monodisperse metallic nanoparticles (NPs) has attracted attention because of the unique properties of this assembly. These properties offer new perspectives for several applications. Thin film preparation techniques involve the synthesis of NPs through chemical methods and their subsequent attachment to various substrates based on different interactions. Langmuir–Blodgett (LB) technique is a promising method, which offers possibilities of in-situ preparation of metallic NP-structured and ordered monolayer films. In this study, 2D AgNPs were synthesized in situ through the reduction of a Langmuir monolayer consisting of a mixture of silver sulfadiazine (AgSD) molecules and stearic acid (SA) surfactant at the air-water interface. Two different Ag reduction methods were used. First, a NaBH4 aqueous solution was used as the subphase to react with the mixed Langmuir monolayer films. Second, the mixed films were irradiated by an ultraviolet (UV) light source (λ = 254 nm) for different time intervals. Scanning electron microscope images, energy-dispersive X-ray spectra, and contact angle measurements show that AgSD was an efficient precursor for the synthesis of Ag NPs LB films with long-range order. A small amount of SA is sufficient to cause the arrangement of the NPs, prevent their aggregation, and provide a hydrophobic characteristic to the Ag NPs LB films. Furthermore, the chemical reduction method using NaBH4 is better than the reduction under UV light for the synthesis of Ag NPs arrangement.en
dc.description.affiliationSão Paulo State University (Unesp) Institute of Chemistry
dc.description.affiliationUnespSão Paulo State University (Unesp) Institute of Chemistry
dc.identifierhttp://dx.doi.org/10.1016/j.tsf.2022.139119
dc.identifier.citationThin Solid Films, v. 746.
dc.identifier.doi10.1016/j.tsf.2022.139119
dc.identifier.issn0040-6090
dc.identifier.scopus2-s2.0-85124378624
dc.identifier.urihttp://hdl.handle.net/11449/234127
dc.language.isoeng
dc.relation.ispartofThin Solid Films
dc.sourceScopus
dc.subjectBidimensional synthesis
dc.subjectHydrophobic AgNP films
dc.subjectLangmuir–Blodgett films
dc.subjectSilver sulfadiazine
dc.titleTwo-dimensional synthesis of silver nanoparticle in situ Langmuir films from the reduction of silver sulfadiazineen
dc.typeArtigo

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