A contribution to the surface characterization of alkali metal sulfates

Fantauzzi, Marzia; Rigoldi, Americo; Elsener, Bernhard; Atzei, Davide; Rossi, Antonella

doi:10.1016/j.elspec.2014.01.007

Cited by 20 publications

(24 citation statements)

References 51 publications

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“…Remarkably, our XPS spectra do not show evidences of adsorbed thiosulfate [56,57] or any other oxidized sulfur species (sulfites, sulfates), which would appear at BE ≥ 167 eV [56,58]. Therefore, XPS measurements of the purified AuNP samples unambiguously show that only reduced sulfur species are adsorbed on the AuNP surface.…”

Section: Xanes and Xps Chemical Analysismentioning

confidence: 56%

The surface chemistry of near-infrared resonant gold nanotriangles obtained via thiosulfate synthesis

Huergo

Giovanetti

Rubert

et al. 2019

Applied Surface Science

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Gold nanoparticles with NIR absorption are promising for photothermal therapy applications. Different syntheses have been proposed and, among them, that based on the reduction of Au(III) with thiosulfate is important because it yields gold nanotriangles (AuNTs) with strong absorption in the near-infrared region. It has been previously reported by others that the nanoparticle surface is covered by relatively weak adsorbed S species (mostly sulfate), which would render the surface easy to functionalize in order to improve biocompatibility and therapeutic effects. In this work we have used XPS, XANES, UV-vis-NIR spectroscopy, HRTEM and AFM to demonstrate that, in contrast to the previous reports, these AuNTs are covered by strongly adsorbed sulfur species (sulfide and polysulfide). A reaction pathway is proposed to explain the presence of reduced sulfur species and the absence of adsorbed sulfates and thiosulfates. Preliminary cytotoxicity assays show that the S-capped AuNTs do not show a deleterious effect for Au concentrations larger than those needed for in vivo photothermal treatments.

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Section: Xanes and Xps Chemical Analysismentioning

confidence: 56%

The surface chemistry of near-infrared resonant gold nanotriangles obtained via thiosulfate synthesis

Huergo

Giovanetti

Rubert

et al. 2019

Applied Surface Science

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“…Similarly, we did not find obvious peak in the range of 157-175 eV (Fig. 6B), suggesting that no sulfur element existed on the surface of CeO 2 nanoparticles, either (Fantauzzi et al, 2014). These results suggest that Cl À and SO 4 2 À did not interact with cerium ions on the surface of CeO 2 nanoparticles as phosphate group and carbonate group did.…”

Section: Mechanism Of Different Anions' Affection On Antioxidant Actisupporting

confidence: 36%

An electrochemical DNA biosensor for evaluating the effect of mix anion in cellular fluid on the antioxidant activity of CeO2 nanoparticles

Zhai

Zhang

Qin

et al. 2015

Biosensors and Bioelectronics

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“…The deposition of sulfates and sulfites/sulfonyls is also detected by XPS spectra in the energy region of O 1s. The peaks typical for O atoms in Li 2 SO 4 and Na 2 SO 4 appear at around 532.6 and 532.0 eV (Fantauzzi et al, 2014). (It is worth to recall that Li and Na atoms in LiF/NaF and Li 2 SO 4 /Na 2 SO 4 exhibit close binding energies).…”

Section: Temperature-induced Changes In Thementioning

confidence: 98%

Hybrid Li/Na Ion Batteries: Temperature-Induced Reactivity of Three-Layered Oxide (P3-Na2/3Ni1/3Mg1/6Mn1/2O2) Toward Lithium Ionic Liquid Electrolytes

et al. 2020

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Hybrid metal ion batteries are perceived as competitive alternatives to lithium ion batteries because they provide better balance between energy/power density, battery cost, and environmental requirements. However, their cycling stability and high-temperature storage performance are still far from the desired. Herein, we first examine the temperature-induced reactivity of three-layered oxide, P3-Na2/3Ni1/3Mg1/6Mn1/2O2, toward lithium ionic liquid electrolyte upon cycling in hybrid Li/Na ion cells. Through ex situ X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses, the structural and surface changes in P3-Na2/3Ni1/3Mg1/6Mn1/2O2 are monitored and discussed. Understanding the relevant changes occurring during dual Li+ and Na+ intercalation into P3-Na2/3Ni1/3Mg1/6Mn1/2O2 is of crucial importance to enhance the overall performance of hybrid Li/Na ion batteries at elevated temperatures.

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A contribution to the surface characterization of alkali metal sulfates

Cited by 20 publications

References 51 publications

The surface chemistry of near-infrared resonant gold nanotriangles obtained via thiosulfate synthesis

The surface chemistry of near-infrared resonant gold nanotriangles obtained via thiosulfate synthesis

An electrochemical DNA biosensor for evaluating the effect of mix anion in cellular fluid on the antioxidant activity of CeO2 nanoparticles

Hybrid Li/Na Ion Batteries: Temperature-Induced Reactivity of Three-Layered Oxide (P3-Na2/3Ni1/3Mg1/6Mn1/2O2) Toward Lithium Ionic Liquid Electrolytes

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