Abstract
Nanoparticles composed of molybdenum oxide, MoOx, were successfully prepared by room-temperature ionic liquid (RTIL)/metal sputtering followed by heat treatment. Hydroxyl groups in RTIL molecules retarded the coalescence between MoOx NPs during heat treatment at 473 K in air, while the oxidation state of Mo species in MoOx 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 MoOx NPs of 55 nm or larger in size that were annealed in a hydroxyl-functionalized RTIL. Photoexcitation of the LSPR peak of MoOx NPs induced electron transfer from NPs to ITO electrodes.
Highlights
Light irradiation of plasmonic nanoparticles (NPs) can induce a collective oscillation of free carriers, so-called localized surface plasmon resonance (LSPR), that can lead to the generation of strong electromagnetic elds at the surfaces.[1]
Since the LSPR peak of chemically synthesized oxygen-de cient MoO3 NPs was reported to be located in the wavelength range of 600–1000 nm,[50,51,52,53] the observed peak at ca. 840 nm was assignable to the LSPR peak of molybdenum oxide NPs
We successfully prepared MoOx NPs showing an LSPR peak in the near-IR region by room-temperature ionic liquid (RTIL)/metal sputtering followed by heat treatment
Summary
Light irradiation of plasmonic nanoparticles (NPs) can induce a collective oscillation of free carriers, so-called localized surface plasmon resonance (LSPR), that can lead to the generation of strong electromagnetic elds at the surfaces.[1]. These results suggested that an appropriate amount of oxygen vacancies was formed with heat treatment for 30 min and could produce free electrons in the MoO3 structure for the LSPR peak shown in Fig. 1a to emerge.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
