A5100749217- Multilevel Inverters and Converters
- Advanced DC-DC Converters
- Conducting polymers and applications
- Spectroscopy and Quantum Chemical Studies
- Advancements in Battery Materials
- Engineering Applied Research
- Electrocatalysts for Energy Conversion
- Advanced Battery Materials and Technologies
- Advanced Memory and Neural Computing
- Magnetic Bearings and Levitation Dynamics
- Induction Heating and Inverter Technology
- Advanced Chemical Physics Studies
- Electric Motor Design and Analysis
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Aerosol Filtration and Electrostatic Precipitation
- Photochemistry and Electron Transfer Studies
- Advanced Electron Microscopy Techniques and Applications
- Mechatronics Education and Applications
- Ecology and Conservation Studies
- Nanomaterials and Printing Technologies
- Thin-Film Transistor Technologies
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
Ajou University
1995-2025
Institute for Basic Science
2015-2023
Korea Advanced Institute of Science and Technology
2015-2023
Konkuk University
2022
Kyungpook National University
2020
Kyung Hee University
2020
Pohang University of Science and Technology
2019
The Graduate University for Advanced Studies, SOKENDAI
2019
Korea Atomic Energy Research Institute
2019
Inha University
2019
This study experimentally and theoretically investigated the characteristics of transition voltage spectroscopy (TVS) with different asymmetric coupling in molecular junctions that were formed by several alkyl- oligoacene-based molecules. On basis analysis a statistically significant number device data (a total ∼300 devices ∼880 TVS data), we confirmed minimum point appearing Fowler–Nordheim (F–N) plot current–voltage depended linearly on energy offset between Fermi electrodes...
Abstract Rapid and spatial temperature measurement on the skin is essential for detecting localized physiological anomalies, such as inflammation or circulatory issues, while providing insights into thermoregulation. Skin‐conformal sensors, with ultra‐flexible designs, enable precise comfortable measurements, supporting real‐time monitoring, early diagnosis, effective intervention. However, achieving rapid skin‐conformal sensor arrays that simultaneously maintain high sensitivity under...
Abstract Coprecipitation effortlessly fabricated nickel hexacyanoferrate (NiHCF) with outstanding rate capability and stability for aqueous batteries. Citrate‐aided coprecipitation decelerated the crystallization, assembling cubic‐shaped powder based on separation between nucleation growth. This study revealed that temperature determined electrochemical performance. With lower temperatures, smaller particles more water were formed by predominant nucleation, resulting in low crystallinity...
Time-resolved X-ray liquidography reveals the molecular origin of solvent-dependent bond length iodine in solution.
Diiodomethane, CH2I2, in a polar solvent undergoes unique photoinduced reaction whereby I2- and I3- are produced from its photodissociation, unlike for other iodine-containing haloalkanes. While previous studies proposed that homolysis, heterolysis, or solvolysis of iso-CH2I-I, which is major intermediate the can account formation I3-, there has been no consensus on mechanism clue reason why those negative ionic species not observed photodissociation chemicals same solvent, example, CHI3,...
In recent years, copper oxide (CuxO) has emerged as a promising <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">p</i> -type semiconductor owing to its high Hall mobility. However, inherent drawbacks, such the substantial native defects and uncontrolled stoichiometry, limit application in thin-film transistors (TFTs) for energy-efficient complementary devices. this study, we employ sol-gel synthetic approach facile doping investigate effects...
In this letter, we demonstrate direct high-sensitivity proton detection by novel electrolyte-gated thin-film transistors. Integrating a sol-gel derived oxide channel and liquid electrolytes, current switching factor of 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> was achieved within 0.5 V gate window. Manipulation the ionic strength in gating solution led to an impressively large electrostatic shift (48 mV/pH), outperforming...
Nickel hexacyanoferrate (NiHCF) has a three-dimensional open framework structure, excellent long-cycling stability and rate performance as cathode for aqueous sodium-ion batteries. However, the specific capacity of NiHCF is lower than that present cathodes A electrolyte was explored to achieve optimum with NiHCF. Powder-type fabricated by coprecipitation atomic composition K0.065Ni1.44Fe(CN)6·4.4H2O. The presence Fe vacancies in attributable inclusion coordinating zeolitic water during...
A new multilevel PWM inverter using half-bridge and full-bridge cells is presented to obtain high quality output voltage minimizing the number of switching devices. It divided into two modules according functional purposes; one a inverter, another level assembly. The basic configuration similar that prior (3/sup n-1/+2) shaped inverter. For use cell substituted for one. Owing this simple compositional alteration, proposed has several promising merits. produces nearly sinusoidal waves by an...
The number of transformer and the size in inverter using 3-phase could be reduced compare with a multi-level single phase transformer. But still needs many switches. we proposed isolated transformers common arm, this paper. Also, novel space vector control is for low frequency propriety method also verified through simulation.
Time-resolved X-ray liquidography (TRXL) has emerged as a powerful technique for studying the structural dynamics of small molecules and macromolecules in liquid solutions. However, TRXL limited sensitivity containing light atoms only, whose signal lower contrast compared with from solvent molecules. Here, we present an alternative approach to bypass this limitation by detecting change temperature resulting photoinduced reaction. Specifically, analyzed heat data obtained p-hydroxyphenacyl...
Abstract Near infrared (NIR) photodetectors (PDs) attain a great attention for their advanced optoelectornic applications such as high‐resolusion biomedical sensors. In particular, all‐polymer PDs composed of electron‐donating and electron‐accepting polymers in active layer offer the advantage various donor acceptor combinations easily tunable absorption spectra electronic properties, along with superior mechanical durability stability. this study, two A 1 –π–A 2 ‐type polymer acceptors are...
This paper proposes a regeneration braking algorithm for Brushless DC (BLDC) motor system. The unipolar switching method has limitation about the when BLDC is operated in low speed region. proposed alternatively utilizes and bipolar to implement overall range. used transition point determined by analyzing during braking. effectiveness of verified using experimental results.
In this paper, we employ Newton's interpolation polynomial for image reconstruction. The used is Bayer CFA patterned green channel. channel arranged as quincunx pattern. Experimental results show the proposed method gives better performance than other conventional methods.