大阪大学 · 材料科学
Marilou Cadatal‐Raduban教授の研究室では、真空紫外（VUV）領域の光機能材料の開発を主軸としており、Nd³⁺-doped フルオライト系結晶（La₁₋ₓBaₓF₃₋ₓ）をマイクロ・プルイングダウン法で高効率に成長させ、175 nm付近に強い蛍光を示す新規VUV蛍光体としての可能性を追求しています。また、酸化チタン（TiO₂）ナノ粒子薄膜を用いたVUV・UV-C光検出器の開発や、第一原理計算を用いたMXene系材料の電子構造・光学的性質の解明も行っています。これらの研究は、次世代の半導体センサーやレーザー材料、核融合・高エネルギー物理学応用への応用が期待されています。
Figures are computed from collected data and may differ slightly.
Nd3+:(La1-xBax)F3-x (x = 0.1) efficiently grown by the micro-pulling down method is explored. Transparency down to 164 nm and broad fluorescence centered at 175 nm make it a novel vacuum ultraviolet scintillator and a potential tunable laser material with the capability of short pulse amplification.
Nd3+:(La1−x,Bax)F3−x(x=0.1) is efficiently grown by the micro-pulling-down method. Characterization of its optical properties reveals that it is transparent in the vacuum ultraviolet region with an absorption edge at around 180 nm. It has fluorescence centered at 175 nm with a bandwidth of 12 nm and a lifetime of 6.1 ns as measured by a vacuum ultraviolet streak camera and spectrometer combination. It is proposed to be suitable as a vacuum ultraviolet scintillator and a potential laser material.
Vacuum ultraviolet radiation (VUV, from 100 nm to 200 nm wavelength) is indispensable in many applications, but its detection is still challenging. We report the development of a VUV photoconductive detector, based on titanium dioxide (TiO<sub>2</sub>) nanoparticle thin films. The effect of crystallinity, optical quality, and crystallite size due to film thickness (80 nm, 500 nm, 1000 nm) and type of substrate (silicon Si, quartz SiO<sub>2</sub>, soda lime glass SLG) was investigated to explore
We report on fabricated titanium dioxide (TiO<sub>2</sub>) thin films along with a transimpedance amplifier (TIA) test setup as a photoconductivity detector (sensor) in the ultraviolet-C (UV-C) wavelength region, particularly at 260 nm. TiO<sub>2</sub> thin films deposited on high-resistivity undoped silicon-substrate at thicknesses of 100, 500, and 1000 nm exhibited photoresponsivities of 81.6, 55.6, and 19.6 mA/W, respectively, at 30 V bias voltage. Despite improvements in the crystallinity of
Abstract We report the potential of lanthanum fluoride (LaF 3 ) as a fast-response scintillator. When excited by an extreme ultraviolet free electron laser, neodymium-doped LaF 3 (Nd 3+ :LaF 3 ) exhibited a 1.9 ns fast decay component and a 6.7 ns slow decay component for its 172 nm emission peak. The slow decay component is due to interconfigurational 4f 2 5d-4f 3 transition in Nd 3+ . First principles density functional theory calculations using the Perdew–Burke–Ernzerhof hybrid functional inc
We investigate the structural, electronic, optical, and thermoelectric properties of three compositions of Mo2C-MXenes (Mo2CF2, Mo2C(OH)2, and Mo2CO2) from monolayer to multilayer by first principles calculation within Density Functional Theory (DFT) and Boltzmann transport theory. Firstly, the atomic structures of Mo2C-MXenes are optimized, and their respective structures are created with comparative research. Secondly, their electronic band structures and optical properties are studied in deta
Open papers in the app to read, cite, and organize with AI.
