ChemInform Abstract: XPS and EXAFS Studies of the Reactions of Co(III) Ammine Complexes with GaAs Surfaces.

Tufts, Bruce J.; Abrahams, I.; Caley, Catherine E.; Lunt, Sharon R.; Miskelly, Gordon M.; Sailor, Michael J.; Santangelo, P. G.; Lewis, Nathan S.; Roe, A. L.

doi:10.1002/chin.199041027

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“…The Fe 2p spectra for both types of NPs could be deconvoluted into five different Fe species, including Fe 0 , Fe 2+ , Fe 3+ , high-binding energy (BE) surface structures, and satellite peaks using a Gaussian–Lorentzian mixed function by XPSPEAK41 software. Similarly, the Co 2p spectra for both types of NPs could be deconvoluted into four different Co species, including Co 0 , Co 2+ , Co 3+ , and satellite peaks. − The BEs of each peak for Ag/FeCo/Ag and Co x Fe 1– x O NPs are summarized in Tables S2 and S3 (Supporting Information), respectively. The atomic ratio between Fe and Co and the relative proportions of each species determined by XPS are listed in Table S4 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Ag/FeCo/Ag Core/Shell/Shell Magnetic Nanoparticles with Plasmonic Imaging Capability

et al. 2015

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Magnetic nanoparticles (NPs) have been used to separate various species such as bacteria, cells, and proteins. In this study, we synthesized Ag/FeCo/Ag core/shell/shell NPs designed for magnetic separation of subcellular components like intracellular vesicles. A benefit of these NPs is that their silver metal content allows plasmon scattering to be used as a tool to observe detection by the NPs easily and semipermanently. Therefore, these NPs are considered a potential alternative to existing fluorescent probes like dye molecules and colloidal quantum dots. In addition, the Ag core inside the NPs suppresses the oxidation of FeCo because of electron transfer from the Ag core to the FeCo shell, even though FeCo is typically susceptible to oxidation. The surfaces of the Ag/FeCo/Ag NPs were functionalized with ε-poly-L-lysine-based hydrophilic polymers to make them water-soluble and biocompatible. The imaging capability of the polymer-functionalized NPs induced by plasmon scattering from the Ag core was investigated. The response of the NPs to a magnetic field using liposomes as platforms and applying a magnetic field during observation by confocal laser scanning microscopy was assessed. The results of the magnetophoresis experiments of liposomes allowed us to calculate the magnetic force to which each liposome was subjected.

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Section: Resultsmentioning

confidence: 99%

Ag/FeCo/Ag Core/Shell/Shell Magnetic Nanoparticles with Plasmonic Imaging Capability

et al. 2015

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ChemInform Abstract: XPS and EXAFS Studies of the Reactions of Co(III) Ammine Complexes with GaAs Surfaces.

Abstract: The chemisorption of Co(II) and Co(III) complexes onto GaAs surfaces is investigated by a combination of XPS, X‐ray absorption spectroscopy, and radiotracer techniques.

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Ag/FeCo/Ag Core/Shell/Shell Magnetic Nanoparticles with Plasmonic Imaging Capability

Ag/FeCo/Ag Core/Shell/Shell Magnetic Nanoparticles with Plasmonic Imaging Capability

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