Abstract
Highlights: Black-Right-Pointing-Pointer We have prepared Ag, Ni and AgNi NPs by derived seed-mediated growth method. Black-Right-Pointing-Pointer The combined use of optical, structural and chemical characterization techniques allows to determine the presence of core-shell structures. Black-Right-Pointing-Pointer The oxidation states of Ag and Ni at the outer layers of the NPs have been studied by XPS. Black-Right-Pointing-Pointer Ag NPs are purely metallic with a fcc structure. Black-Right-Pointing-Pointer Ni NPs are formed by Ni core-NiO + Ni(OH){sub 2} shell structure. Black-Right-Pointing-Pointer Ag core-NiO + Ni(OH){sub 2} shell structure is determined for AgNi NPs, with oxidized silver atoms at the interface. - Abstract: The chemical structure of silver, nickel and bimetallic silver-nickel nanoparticles, i.e. Ag, Ni and AgNi NPs, with sizes {<=}35 nm, obtained by derived seed-mediated growth method on transparent and conductive indium tin oxide (ITO) substrates, has been studied by a comparative X-ray photoelectron spectroscopy (XPS) analysis of Ag 3d, Ni 2p and O1s core levels in combination with X-ray diffraction and optical absorption spectroscopy in the visible range. XPS indicates that the surface of Ag NPs is not oxidized, while Ni NPs are clearly oxidized to nickel oxide and hydroxide. Absorptions at 384 and 600 nm in Ni optical spectrum are
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Prieto, Pilar;
[1]
Nistor, Valentin;
[1]
Nouneh, Khalid;
[2]
Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8520 (Japan)];
Oyama, Munetaka;
[3]
Abd-Lefdil, Mohammed;
[4]
Diaz, Raquel
[1]
- Departamento de Fisica Aplicada and Instituto de Ciencia de Materiales 'Nicolas Cabrera', Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain)
- Institute for Nanomaterials and Nanotechnology (INANOTECH), Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), ENSET, Av. Armee Royale, 10100, Rabat (Morocco)
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8520 (Japan)
- Laboratory of Materials Physics, University Mohammed V-Agdal, Rabat (Morocco)
Citation Formats
Prieto, Pilar, Nistor, Valentin, Nouneh, Khalid, Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8520 (Japan)], Oyama, Munetaka, Abd-Lefdil, Mohammed, and Diaz, Raquel.
XPS study of silver, nickel and bimetallic silver-nickel nanoparticles prepared by seed-mediated growth.
Netherlands: N. p.,
2012.
Web.
doi:10.1016/J.APSUSC.2012.05.095.
Prieto, Pilar, Nistor, Valentin, Nouneh, Khalid, Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8520 (Japan)], Oyama, Munetaka, Abd-Lefdil, Mohammed, & Diaz, Raquel.
XPS study of silver, nickel and bimetallic silver-nickel nanoparticles prepared by seed-mediated growth.
Netherlands.
https://doi.org/10.1016/J.APSUSC.2012.05.095
Prieto, Pilar, Nistor, Valentin, Nouneh, Khalid, Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8520 (Japan)], Oyama, Munetaka, Abd-Lefdil, Mohammed, and Diaz, Raquel.
2012.
"XPS study of silver, nickel and bimetallic silver-nickel nanoparticles prepared by seed-mediated growth."
Netherlands.
https://doi.org/10.1016/J.APSUSC.2012.05.095.
@misc{etde_22154477,
title = {XPS study of silver, nickel and bimetallic silver-nickel nanoparticles prepared by seed-mediated growth}
author = {Prieto, Pilar, Nistor, Valentin, Nouneh, Khalid, Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8520 (Japan)], Oyama, Munetaka, Abd-Lefdil, Mohammed, and Diaz, Raquel}
abstractNote = {Highlights: Black-Right-Pointing-Pointer We have prepared Ag, Ni and AgNi NPs by derived seed-mediated growth method. Black-Right-Pointing-Pointer The combined use of optical, structural and chemical characterization techniques allows to determine the presence of core-shell structures. Black-Right-Pointing-Pointer The oxidation states of Ag and Ni at the outer layers of the NPs have been studied by XPS. Black-Right-Pointing-Pointer Ag NPs are purely metallic with a fcc structure. Black-Right-Pointing-Pointer Ni NPs are formed by Ni core-NiO + Ni(OH){sub 2} shell structure. Black-Right-Pointing-Pointer Ag core-NiO + Ni(OH){sub 2} shell structure is determined for AgNi NPs, with oxidized silver atoms at the interface. - Abstract: The chemical structure of silver, nickel and bimetallic silver-nickel nanoparticles, i.e. Ag, Ni and AgNi NPs, with sizes {<=}35 nm, obtained by derived seed-mediated growth method on transparent and conductive indium tin oxide (ITO) substrates, has been studied by a comparative X-ray photoelectron spectroscopy (XPS) analysis of Ag 3d, Ni 2p and O1s core levels in combination with X-ray diffraction and optical absorption spectroscopy in the visible range. XPS indicates that the surface of Ag NPs is not oxidized, while Ni NPs are clearly oxidized to nickel oxide and hydroxide. Absorptions at 384 and 600 nm in Ni optical spectrum are consistent with the presence of nickel in oxidized state; however the presence of metallic Ni 2p signal in Ni XPS spectrum indicates that a metallic nickel core is still present. In the case of bimetallic AgNi NPs, the XPS results are consistent with the presence of metallic silver core surrounded by NiO + Ni(OH){sub 2} shell. XPS spectra also show the presence of Ag{sub 2}O at the interface between the Ag metallic core and the oxidized nickel shell. XRD patterns of AgNi and Ag NPs show the typical fcc structure of metallic silver, confirming the presence of Ag metallic core in AgNi NPs. The surface plasmon resonance peak (SPR) of AgNi NPs shows a blue shift to 375 nm with respect to the SPR of Ag NPs, located at 405 nm, reflecting the character of the oxidized nickel shell.}
doi = {10.1016/J.APSUSC.2012.05.095}
journal = []
issue = {22}
volume = {258}
journal type = {AC}
place = {Netherlands}
year = {2012}
month = {Sep}
}
title = {XPS study of silver, nickel and bimetallic silver-nickel nanoparticles prepared by seed-mediated growth}
author = {Prieto, Pilar, Nistor, Valentin, Nouneh, Khalid, Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8520 (Japan)], Oyama, Munetaka, Abd-Lefdil, Mohammed, and Diaz, Raquel}
abstractNote = {Highlights: Black-Right-Pointing-Pointer We have prepared Ag, Ni and AgNi NPs by derived seed-mediated growth method. Black-Right-Pointing-Pointer The combined use of optical, structural and chemical characterization techniques allows to determine the presence of core-shell structures. Black-Right-Pointing-Pointer The oxidation states of Ag and Ni at the outer layers of the NPs have been studied by XPS. Black-Right-Pointing-Pointer Ag NPs are purely metallic with a fcc structure. Black-Right-Pointing-Pointer Ni NPs are formed by Ni core-NiO + Ni(OH){sub 2} shell structure. Black-Right-Pointing-Pointer Ag core-NiO + Ni(OH){sub 2} shell structure is determined for AgNi NPs, with oxidized silver atoms at the interface. - Abstract: The chemical structure of silver, nickel and bimetallic silver-nickel nanoparticles, i.e. Ag, Ni and AgNi NPs, with sizes {<=}35 nm, obtained by derived seed-mediated growth method on transparent and conductive indium tin oxide (ITO) substrates, has been studied by a comparative X-ray photoelectron spectroscopy (XPS) analysis of Ag 3d, Ni 2p and O1s core levels in combination with X-ray diffraction and optical absorption spectroscopy in the visible range. XPS indicates that the surface of Ag NPs is not oxidized, while Ni NPs are clearly oxidized to nickel oxide and hydroxide. Absorptions at 384 and 600 nm in Ni optical spectrum are consistent with the presence of nickel in oxidized state; however the presence of metallic Ni 2p signal in Ni XPS spectrum indicates that a metallic nickel core is still present. In the case of bimetallic AgNi NPs, the XPS results are consistent with the presence of metallic silver core surrounded by NiO + Ni(OH){sub 2} shell. XPS spectra also show the presence of Ag{sub 2}O at the interface between the Ag metallic core and the oxidized nickel shell. XRD patterns of AgNi and Ag NPs show the typical fcc structure of metallic silver, confirming the presence of Ag metallic core in AgNi NPs. The surface plasmon resonance peak (SPR) of AgNi NPs shows a blue shift to 375 nm with respect to the SPR of Ag NPs, located at 405 nm, reflecting the character of the oxidized nickel shell.}
doi = {10.1016/J.APSUSC.2012.05.095}
journal = []
issue = {22}
volume = {258}
journal type = {AC}
place = {Netherlands}
year = {2012}
month = {Sep}
}