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Article
Optical properties of LaFeO3 films studied using spectroscopic ellipsometry
LaFeO3 film is an intermediate charge transfer/Mott–Hubbard insulator. LaFeO3 thin films were grown on SrTiO3 substrates using radio frequency magnetron sputtering deposition method at 500 °C. After growth, the L...
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Chapter and Conference Paper
Information-Based Patrol Speed Control Method for Rail-Guided Robot System Using Deep Deterministic Policy Gradient Algorithm
To manage the safety of multi-use facilities, many CCTVs and alarm sensors are used, however, they cannot replace patrol tasks to check site conditions from multiple directions. The developed rail-guided smart...
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Article
Electrical and Optical Properties of Amorphous Indium-Zinc-Tin Oxide Thin Films: Oxygen Flow Dependence
In this study, the electrical and the optical properties of the amorphous indium-zinc-tin oxide (IZTO) thin films that had been grown using a cosputtering system were investigated as a function of the oxygen f...
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Article
Open AccessPostoperative serum metabolites of patients on a low carbohydrate ketogenic diet after pancreatectomy for pancreatobiliary cancer: a nontargeted metabolomics pilot study
A ketogenic diet is a potential adjuvant cancer therapy that limits glucose availability to tumours while fuelling normal tissues with ketone bodies. We examined the effect of a low carbohydrate ketogenic diet...
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Article
Thermoelectric Properties and Chemical Potential Tuning by K- and Se-Coalloying in (Pb0.5Sn0.5)1−xKxTe0.95Se0.05
Topological crystal insulator (TCI) and topological Dirac semimetals have topologically nontrivial surface and bulk state, respectively. The parent compound of Pb0.5Sn0.5Te exhibiting TCI band inversion has parti...
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Article
Thermally-driven unequal cation vacancy formation and its effect on the dielectric properties in K0.5Na0.5NbO3 ceramics
The formation of cation vacancies can be useful for electro-chemical devices. In this regard, an understanding of vacancy formation is an important subject for enhancing current electrochemical devices and for...
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Article
Optical and electrical properties of Sn-doped ZnO thin films studied via spectroscopic ellipsometry and hall effect measurements
We investigated the optical and the electrical properties of Sn-doped ZnO thin films grown via RF co-sputtering deposition methods at room temperature. Through annealing, the carrier concentrations and mobilit...
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Article
Electrical and optical properties of VO2 thin films grown on various sapphire substrates by using RF sputtering deposition
VO2 thin films were grown on a-, c-, m-, and r-plane sapphire and SiO2/Si substrates under identical conditions by using RF sputtering deposition from a VO2 target. The structural and the morphological properties...
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Article
Open AccessPrecise and selective sensing of DNA-DNA hybridization by graphene/Si-nanowires diode-type biosensors
Single-Si-nanowire (NW)-based DNA sensors have been recently developed, but their sensitivity is very limited because of high noise signals, originating from small source-drain current of the single Si NW. Her...
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Article
Optical properties of amorphous Ge1−x Se x and Ge1−x−y Se x As y thin films — optical gap bowing and phonon modes
We investigated the optical properties of Ge1−x Se x and Ge1−x−y Se x As y a...
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Article
Ultrafast coherent phonon dynamics in Ge2Sb2Te5 thin films
We investigated the coherent acoustic and optical phonon dynamics in a Ge2Sb2Te5 phase change material by using pump-probe spectroscopy. Oscillating reflectivity changes with oscillation period and de-phasing tim...
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Article
Optical properties of organic semiconductor thin films: 2,6,9,10-tetrakis(phenylethynyl)anthracene
Two kinds of anthracene derivative thin films, 2, 6-bis((4-hexylphenyl)ethynyl)-9, 10-bis(phenyl ethynyl)anthracene (B-ant-THB) and 9, 10-bis((4-hexyl phenyl)ethynyl)-2, 6-bis (phenyl ethynyl) anthracene (HB-a...
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Article
Optical study of bulk and thin-film tin dioxide
We grew nano-crystalline SnO2 thin films on Si substrates by using RF magnetron sputtering deposition method. We examined the microstructure of the SnO2 thin films via X-ray diffraction (XRD) and the optical prop...
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Article
Growth of High-Quality Pb(ZrxTi1-x)O3 Films by Peroxide MBE and Their Optical and Structural Characteristics
The growth of Pb(ZrxTi1-x)O3 (PZT) films by molecular beam epitaxy was demonstrated. Single-crystal, single-phase PZT films were grown on (001) SrTiO3 substrates at a growth temperature of 600°C. In situ monitori...
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Article
Structural and Optical Properties of PbTiO3 Grown on SrTiO3 Substrates by Peroxide MBE
Lead titanate (PbTiO3), a ferroelectric material with perovskite structure, has received a great deal of attention owing to a unique combination of its piezoelectric, pyroelectric, dielectric, electo- and acousto...
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Article
Optical Study of SiO2/nanocrystalline-Si Multilayers Using Ellipsometry
Using variable-angle spectroscopic ellipsometry, we measure the pseudo-dielectric functions of as-deposited and annealed SiO2/SiOx multilayers (MLs). The SiO2(2nm)/SiOx(2nm) MLs have been prepared under various d...
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Article
Dielectric Function and Band Gaps of Si1−xCx AND Si0.924−xGe0.076Cx (0≤x≤0.014) Semiconductor Alloys Grown on Si
We have characterized the optical properties of heteroepitexial Si1−xCx and Si0.924−xGe0.076Cx (0≤x≤0.014) alloys grown on Si substrates by solid phase epitaxy using spectroscopic ellipsometry. The measured diele...
