A5029265334- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Ferroelectric and Piezoelectric Materials
- Acoustic Wave Resonator Technologies
- Perovskite Materials and Applications
- Conducting polymers and applications
- ZnO doping and properties
- Advancements in Battery Materials
- Multiferroics and related materials
- Anodic Oxide Films and Nanostructures
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Metal and Thin Film Mechanics
- Gas Sensing Nanomaterials and Sensors
- Copper-based nanomaterials and applications
- Optical Coatings and Gratings
- Nanoporous metals and alloys
- Transition Metal Oxide Nanomaterials
- Magnetic properties of thin films
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Nanofabrication and Lithography Techniques
- Surface Treatment and Residual Stress
- 2D Materials and Applications
- Metal Alloys Wear and Properties
Institute of Systems, Information Technologies and Nanotechnologies
2018-2025
Kyushu University
2013-2019
Osaka Prefecture University
2018
University of Jinan
2016
Xi'an Jiaotong University
2005-2014
Tokushima University
2008-2014
China XD Group (China)
2014
Excess/unreacted lead iodide (PbI2 ) has been commonly used in perovskite films for the state-of-the-art solar cell applications. However, an understanding of intrinsic degradation mechanisms cells (PSCs) containing unreacted PbI2 still insufficient and, therefore, needs to be clarified better operational durability. Here, it is shown that PSCs hastened by crystals under continuous light illumination. Unreacted undergoes photodecomposition illumination, resulting formation and iodine films....
Abstract Organic–inorganic halide perovskites are promising for use in solar cells because of their efficient power conversion. Current–voltage hysteresis and degradation under illumination still issues that need to be solved future commercialization. However, why occur typical perovskite cell structures, with an electron transport layer metal oxide such as SnO 2 , has not been well understood. Here we show one reason the is localization positive ions caused by hydroxyl groups existing at...
Thermal stress significantly impacts the durability of perovskite solar cells (PSCs), as evidenced by severe degradation observed at 85 °C in this study. This is attributed to gold migration through soft 2,2′,7,7′‐tetrakis( N , ‐di‐4‐methoxyphenylamino)‐9,9′‐spirobifluorene (spiro‐MeOTAD) hole transport layer (HTL) into layer, driven gold's low formation energy and diffusion barrier. To mitigate issue, several vacuum‐evaporable hard transition metal oxides charge extraction interlayers...
Epoxy resins, which possess a three-dimensional network obtained by curing reaction between epoxy and amine compounds, are in glassy state at room temperature. They therefore generally brittle exhibit rather poor resistance to crack propagation, is one of the greatest drawbacks for their practical application. To solve this problem, better understanding fracture behavior, related long-term durability, strongly desired. We herein report on how extent heterogeneity affects behavior resins....
The optical transmission spectra of ZnO/Ag/ZnO films showed a broad range enhancement due to harmonic generated by surface plasmon resonance. This resonance was correlated with interface electrons between metallic Ag and dielectric ZnO layer. charge density wave calculated compared experimental results using Maxwell’s equations modified boundary condition. Finally, an observed redshift in the is discussed both Ohmic contact model Drude free electron model.
ZnO films with an embedded silver layer, one of the most promising transparent conductive materials, possess excellent conductivity and optical transmittance. The performance is greatly affected by morphology layer. In this work, we studied changes in electrical properties ZnO/Ag multilayered as a function coalescence clusters. Silver clusters aggregated into various morphologies at different layer growth stages dominantly result electron transport mechanisms. transmittance was also enhanced...
This paper proposes a simple, effective, non-scanning method for the visualization of cell-attached nanointerface. The uses localized surface plasmon resonance (LSPR) excited homogeneously on two-dimensional (2D) self-assembled gold-nanoparticle sheet. LSPR sheet provides high-contrast interfacial images due to confined light within region few tens nanometers from particles and enhancement fluorescence. Test experiments rat basophilic leukemia (RBL-2H3) cells with fluorescence-labeled actin...
Photocatalytic water splitting or CO2 reduction is one of the most promising strategies for solar energy conversion into hydrogen-containing fuels. However, these two processes typically compete with each other, which significantly decreases efficiency. Herein, we report first time this competition can be overcome by modulation reactive sites and electron transfer pathway heterogeneous photocatalysts. As a prototype, BiO composite reduced graphene oxide quantum dots (RGO-BiO QDs) were...
Abstract We propose a unique random metal nanohemisphere on mirror (NHoM) structure to tune the surface plasmon (SP) resonance in flexible manner. The SP peak was split into two peaks owing strong coupling between mode and image generated substrate. This phenomenon is based fact that induced electromagnetic effects are similar those pertaining Rabi splitting, Fano resonance, electromagnetically transparency, thus providing quantum effect analogies. These phenomena have recently attracted...
To improve the efficiencies of electronic devices, materials with variable work functions are required to decrease energy level differences at interfaces between working layers. Here, we report a method obtain silver nanoparticles tunable functions, which have same core 5 nm in diameter and capped by myristates 1-octanethoilates self-assembled monolayers, respectively. The organic molecules can form uniform two-dimensional sheet air-water interface, be transferred on various hydrophobic...
Abstract In this study, we observed the peak splitting of absorption spectra for two-dimensional sheets silver nanoparticles due to electromagnetically induced transparency (EIT) effect. This unique optical phenomenon was multilayered nanosheets up 20 layers on a metal substrate, while not transparent substrate. The wavelength and intensities split peaks depend number layers, experimental results were well reproduced by calculation Transfer-Matrix method employing effective medium...
We have experimentally investigated the mechanism of exchange bias in 2D van der Waals (vdW) ferromagnets by means anomalous Hall effect (AHE) together with dynamical magnetization property. The temperature dependence AC susceptibility its frequency response indicates a glassy transition magnetic property for Te-rich FeGeTe vdW ferromagnet. also found that irreversible voltage follows de Almeida–Thouless line. Moreover, freezing spin-glass-like phase is to correlate disappearance bias. These...
Enhanced light transmission through coupling incident with surface plasmon polaritons (SPPs) on a layer-plus-islands nanostructure Ag layer, surrounded by symmetric ZnO dielectrics (ZnO/Ag/ZnO), was investigated. The couple and decouple processes at ZnO/Ag Ag/ZnO grating interfaces were considered to confine the SPPs (near field) then excite radiate (far field), which enhanced transmission. A broad range of enhancement showed blueshift increasing midlayer mass thickness. physical reasons for...
Nitrogen- and sulfur-codoped carbon catalysts were prepared as electrocatalytic materials for the oxygen reduction reaction (ORR). Herein, we propose a novel effective one-pot synthetic approach to prepare NS-doped catalyst by using mixture of graphene oxide multi-walled nanotubes support. Successful NS-doping formation catalytically active sites confirmed X-ray photoelectron spectroscopy with energy dispersion spectroscopy. The ORR activity NS-codoped was investigated rotating disc...
To understand the stability of Co-free positive electrode materials, LiNi0.5Mn0.5O2 was synthesized with different amounts lithium added during calcination. The valence states Ni and Mn transition metals prepared samples were determined through accurate stoichiometry analyses (via inductively coupled plasma optical emission spectrometry), magnetic moment measurements superconducting quantum interference device magnetometry), element X-ray spectroscopy in combination Ar ion etching for depth...