The University of Osaka · 재료과학
Marilou Cadatal‐Raduban 교수의 연구실은 주로 광학적 특성이 뛰어난 새로운 반도체 및 스캐터링 물질, 특히 근적외선 및 진공 자외선(VUV) 영역에서의 응용을 목표로 합니다. 넒은 투과성과 강한 형광 특성을 지닌 Nd³⁺ Dopant를 포함한 플루오르화 라운드(예: LaF₃, La₁₋ₓBaₓF₃₋ₓ) 물질의 합성과 특성 분석을 중심으로 하며, VUV 감지기 및 레이저 소재로의 응용 가능성을 탐색하고 있습니다. 또한, 이산화티타늄(TiO₂) 나노막대 기반의 고감도 UV-C 광전도 검출기 개발과 함께, MXene 계열의 전자적, 열전적 성질에 대한 이론적 연구도 병행하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
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
