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en: Characteristics of Ag-doped LaMnO3 perovskite oxide and its application as a solid oxide fuel cell cathode

en: Materials Advances

ja: Materials Advances


en: Enhancement of Visible Light Response of TiO2 Photocatalyst by 3D-Deposited Ag Nanowires and Its Charge Separation Mechanism

en: In 3D-deposited AgNW/TiO2, which is prepared by spray-applying titanium dioxide suspension to deposited silver nanowire sheets, the synergistic effects of increased crossing points of AgNWs to enhance localized surface plasmon resonance excitation and longer-lived electrons in the conduction band of TiO2 generated by plasmon-induced charge transfer have successfully resulted in photocatalytic activity in the visible light range. We have developed photocatalytic sheets in which TiO2 particles are uniformly attached to 3D-deposited AgNWs. Regarding the prepared sheet, it was confirmed that TiO2 was indeed well adhered to the AgNWs, and electron transfer was efficient at the interface. This sheet solves the problem that the response wavelength range of the photocatalytic reaction using TiO2 is only in the ultraviolet region and exhibits sufficient photocatalytic effect in the visible light region. Transient absorption spectroscopy measurements in the diffuse reflectance configuration confirmed that the electrons of AgNWs actually move into the conduction band of TiO2 under visible light and that the interaction is independent of the excitation light intensity, thereby extending the lifetime of the electrons.

en: The Journal of Chemical Physics

ja: The Journal of Chemical Physics


en: Development of silver nanocubes created by pulsed laser ablation in liquid

en: International Journal of Modern Physics B


en: Plasmonic-heating-induced nanofabrication on glass substrates

en: Fabricating nano-sized through-holes on a coverslip approximately 100 μm thick is challenging but rewarding when applied to ultrafine filters that separate proteins and DNA of various sizes and isolate viruses from cells. Toward this end, we developed an in situ etching-assisted laser processing technique exploiting gold nanoparticles. Plasmonic heating of a single gold nanoparticle through focused illumination of a continuous-wave laser beam enables structural modifications to be localized to the contact area on the glass surface. This results in the embedding of the particle forming nanocavities caused by chemical etching with aqueous tetrabutylammonium hydroxide. Depending on the shape of the nanoparticle, a highly flexible face geometry design such as a disk and triangle was achieved. The etching was monitored in situ through measurements of spectral red shifts in single-particle scattering, indicating an increasing medium refractive index consistent with embedding. The embedding process is unexpectedly fast, at 0.8 μm with 5 minutes of illumination. Besides nanoholes, we fabricated nanodomes around a single gold nanoparticle supported on a glass substrate through laser-heating-induced encapsulation. Overall, we were able to demonstrate true nano-laser processing free from diffraction-limited optics, with potential benefits of simple low-cost fabrication.

en: Nanoscale

ja: Nanoscale


en: Identification of Second Phases for Sr1-xLaxTiO3 Perovskites Synthesized by Citric-Gel Method

en: ECS Transactions

ja: ECS Transactions


en: Photoluminescence Property of Nano Silica Mixed YAG:Ce Phosphors

en: The 3rd International Conference on Nanomaterials and Advanced CompositesProceedings of NAC 2022,Springer Proceedings in Physics

number: No.chapter 7