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

ABSTRACT: 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.

SUBMITTER: Akiyoshi K 

PROVIDER: S-EPMC9055849 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature