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Controlling the oxidation state of molybdenum oxide nanoparticles prepared by ionic liquid/metal sputtering to enhance plasmon-induced charge separation

Akiyoshi, Kazutaka ; Kameyama, Tatsuya ; Yamamoto, Takahisa ; Kuwabata, Susumu ; Tatsuma, Tetsu ; Torimoto, Tsukasa

RSC advances, 2020-08, Vol.1 (48), p.28516-28522 [Periódico revisado por pares]

England: Royal Society of Chemistry

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  • Título:
    Controlling the oxidation state of molybdenum oxide nanoparticles prepared by ionic liquid/metal sputtering to enhance plasmon-induced charge separation
  • Autor: Akiyoshi, Kazutaka ; Kameyama, Tatsuya ; Yamamoto, Takahisa ; Kuwabata, Susumu ; Tatsuma, Tetsu ; Torimoto, Tsukasa
  • Assuntos: Chemistry ; Coalescing ; Electron transfer ; Heat treatment ; Hydroxyl groups ; Ionic liquids ; Ions ; Molybdenum ; Molybdenum oxides ; Nanoparticles ; Oxidation ; Photoexcitation ; Room temperature ; Sputtering ; Valence
  • É parte de: RSC advances, 2020-08, Vol.1 (48), p.28516-28522
  • Notas: Electronic supplementary information (ESI) available. See DOI
    10.1039/d0ra05165a
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Nanoparticles composed of molybdenum oxide, MoO x , were successfully prepared by room-temperature ionic liquid (RTIL)/metal sputtering followed by heat treatment. Hydroxyl groups in RTIL molecules retarded the coalescence between MoO x NPs during heat treatment at 473 K in air, while the oxidation state of Mo species in MoO x nanoparticles (NPs) could be modified by changing the heat treatment time. An LSPR peak was observed at 840 nm in the near-IR region for MoO x NPs of 55 nm or larger in size that were annealed in a hydroxyl-functionalized RTIL. Photoexcitation of the LSPR peak of MoO x NPs induced electron transfer from NPs to ITO electrodes. MoO x NPs, prepared by sputtering Mo metal on a room-temperature ionic liquid (RTIL) followed by heating in air, produced anodic photocurrents with the excitation of their LSPR peak.
  • Editor: England: Royal Society of Chemistry
  • Idioma: Inglês
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