A5100434250- 2D Materials and Applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- MXene and MAX Phase Materials
- Structural Behavior of Reinforced Concrete
- Engineering Applied Research
- Crystallization and Solubility Studies
- Advanced Sensor and Energy Harvesting Materials
- Magnetic Bearings and Levitation Dynamics
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Architecture, Modernity, and Design
- X-ray Diffraction in Crystallography
- Masonry and Concrete Structural Analysis
- Seismic Performance and Analysis
- Graphene research and applications
- Electric Motor Design and Analysis
- Architecture, Design, and Social History
- Electrochemical sensors and biosensors
- Luminescence and Fluorescent Materials
- Muscle activation and electromyography studies
- Semiconductor Quantum Structures and Devices
- Muscle Physiology and Disorders
Tohoku Gakuin University
2024
Gwangju Institute of Science and Technology
2023-2024
Korea University
2000-2023
Hanbat National University
2022
Daewoo Shipbuilding and Marine Engineering (South Korea)
2020
Kaya University
2015
Gyeongsangnam-do Agricultural Research and Extension Services
2015
Samsung (South Korea)
1997-2013
Korea Automotive Technology Institute
2013
Kyungsung University
2013
Myocardial infarction (MI) is a major cause of death worldwide. After the occurrence MI, heart frequently undergoes serious pathological remodeling, leading to excessive dilation, electrical disconnection between cardiac cells, and fatal functional damage. Hence, extensive efforts have been made suppress remodeling promote repair infarcted heart. In this study, we developed hydrogel patch that can provide mechanical support, conduction, tissue adhesiveness aid in recovery an function....
The electrical and optical characteristics of two-dimensional (2D) transition-metal dichalcogenides (TMDCs) can be improved by surface modification. In this study, distinctive field-effect transistors (FETs) were realized forming cross-type 2D WSe2/MoS2 p–n heterojunctions through treatment using poly(methyl methacrylate-co-methacrylic acid) (PMMA-co-PMAA). FETs applied to new ternary inverters as multivalued logic circuits (MVLCs). Laser confocal microscope photoluminescence spectroscopy...
Perovskite CsPbX3 (X = Br, Cl, and I) nanostructures have been intensively studied as they are luminescent, photovoltaic, photosensitizing active materials. Two-dimensional (2D) transition-metal dichalcogenides (TMDCs) with MX2 (M Mo, W; X S, Se, Te, etc.) structures used in flexible optoelectronic devices. In this study, perovskite green-light-emitting CsPbBr2I1 quantum dots (QDs) blue-light-emitting CsPb(Cl/Br)3-QDs utilized to enhance the photoresponsive characteristics of 2D MSe2 Mo...
The dipole characteristics of Frenkel excitons and charge-transfer between donor acceptor molecules in organic heterostructures such as exciplexes are important photonics optoelectronics. For the bilayer 4,4',4''-tris[(3-methylphenyl)phenylamino]triphenylamine 2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine molecules, form aligned dipoles perpendicular to excitons, observed back focal plane photoluminescence images. angular chromism 100 meV range indicates possible delocalization angle-sensing...
Abstract Interlayer excitons (IXs) at the interface of heterostructures (HSs) with a staggered band alignment are fascinating quantum quasi‐particles light‐emitting and long‐lifetime characteristics. In this study, energy alignments (EBAs) HS MAPbI 3 perovskite thin sheets CdSe‐ZnS core–shell dot (QD) layers modulated by using different diameters QDs. Far‐red IX emission is observed 1.42 eV from /CdSe‐ZnS‐QD ( λ em = 645 nm) type‐II EBA owing to charge transfer. The lifetime far‐red IXs...
Multivalued logic (MVL) circuits with higher efficiencies, such as the ternary inverter, can be considered promising structures to overcome limitation of a binary system. Photo-responsive characteristics two-dimensional (2D) MoS2 and organic-rubrene nanosheet (NS) n-p heterojunction field-effect-transistor (FET) are studied aim construct novel photo-triggered inverter MVL circuit. Anti-ambipolar transistor (AAT) were observed for MoS2/organic-rubrene-NS FETs. The serially connected devices...
Alteration of heterocyclic moiety (:C → Ir vs . N Ir) and change π-conjugation length in the main chelating ligand significantly affect excited-state properties phosphorescent Ir( iii ) complexes.
To elucidate the key parameters governing emission properties of phenylimidazole (pim)-based Ir(III) emitters, including their electronic structure and bulky aryl substitution effect, a series pim-based iridium(III) complexes (Ir(Rpim-X)3, Rpim-X = 1-R-2-(X-phenyl)-1H-imidazole) bearing secondary pendants increasing bulkiness [R methyl (Me), phenyl (Ph), terphenyl (TPh), or 4-isopropyl (ITPh)] three different primary pim ligands (X F, F2, CN) were designed synthesized. Based on photophysical...
Various donor–acceptor heterostructures with type-II band alignment are reviewed for distinct characteristics and excitonic devices of interlayer intermolecular excitons using inorganic organic semiconductors.
Efficient tris-bidentate Ir(III) phosphorescent dopants were prepared using a series of 1,2,4-triazolo[4,3-f]phenanthridine (tzp) moieties modified with aryl substituents (phenyl, tolyl, and xylenyl) as the main phenylimidazole-based N-heterocyclic carbene (NHC) chelates (C∧C:). According to degree bulkiness substituent ligation mode, five Ir(tzpC∧C:) complexes include four homoleptic NHC-Ir(III) complexes, fac-Ir(tzpPh)3, fac-/mer-Ir(tzpTol)3, mer-Ir(tzpXyl)3, one heteroleptic complex,...
Heterointerlayer excitons (HIXs) have been intensively studied in heterostructures of various two-dimensional (2D) nanosystems with staggered band alignment (type II). In this study, the laser confocal microscopy (LCM) photoluminescence (PL) characteristics exciton species, including HIXs monolayer (1 L) WS2 and multilayer PbI2 heterostructures, were investigated from 3 to 293 K. The drastic decrease PL intensity 1 L after hybridization indicates occurrence charge transfer. peaks...
Long acting injectables (LAIs) using polymeric microspheres has been developed to increase patient compliance and reduce side effects. Among many methods for manufacturing microspheres, microfluidics technology is known have excellent characteristics in that the produced perfect spherical shape without surface defect uniform size, thus outstanding efficacy initial burst. However, mass production of was not realized by inherent limitation suitable small quantity manufacturing. Overcoming such...
Excitons, electron-hole pairs in semiconductors, can be utilized as information carriers with a spin or valley degree of freedom. However, manipulation excitons' motion is challenging because their charge-neutral characteristic and short recombination lifetimes. Here we demonstrate electric-field-driven drift funneling charged excitons (i.e., trions) toward the center MoSe
This paper studied the feasibility of a sliding base isolation layer to be used in rubble stone masonry buildings rural areas Himalayan Mountain range provide robust protection important building like schools against strong earthquakes. In this paper, we carried out on-site investigations, quasi-static tests, and shaking table tests focusing on constructability as well performance. From results study, combination styrofoam, concrete slab, grease was found most feasible upper element, lower...
The characteristics of field effect transistors (FETs) fabricated using two-dimensional (2D) transition-metal dichalcogenides (TMDCs) can be modulated by surface treatment the active layers. In this study, an ionic π-conjugated polyelectrolyte, poly(9,9-bis(4′-sulfonatobutyl)fluorene-alt-1,4-phenylene) potassium (FPS-K), was used for MoSe2 and WS2 FETs. photoluminescence (PL) intensities monolayer (1L)-MoSe2 1L-WS2 clearly decreased, PL peaks were red-shifted after FPS-K treatment,...
To explore the excited-state electronic structure of blue-emitting Ir(dmp)3 dopant material (dmp = 3-(2,6-dimethylphenyl)-7-methylimidazo[1,2-f]phenanthridine), which is notable for durable blue phosphorescent organic light-emitting diode (PhOLED), a series homoleptic dmp-based Ir(III) complexes (DMP–R, tris[3-(2,6-dimethylphenyl)-7-R-imidazo[1,2-f]phenanthridin-12-yl-κC12,κN1]iridium, R H, CH3, F, and CF3) were prepared by introducing an electron-donating group (EDG; −CH3) or...
Abstract Background Quantum dots (QDs) have outstanding optical properties such as strong fluorescence, excellent photostability, broad absorption spectra, and narrow emission bands, which make them useful for bioimaging. However, cadmium (Cd)-based QDs, been widely studied, potential toxicity problems. Cd-free QDs also but their weak photoluminescence (PL) intensity makes practical use in bioimaging challenging. In this study, QD nanoprobes were fabricated by densely embedding multiple...
This paper presents the development of E-scooter in large urban areas and industrial areas. The proposed prototype is propelled by two BLDC motors placed on rear wheels a 48V lead-acid battery for propulsion energy. A control scheme based low-cost processor provides cost effective using hall position sensors alternative to traditional encoders resolvers. Experimental results will show that can improve drive efficiency as well performance variable commercial satisfaction.
This study examined the effects of wind loads on a floating production storage and offloading (FPSO) vessel, focusing in particular impact turbulent profiles, level details topside structures, operation modes gantry cranes. A series tunnel tests were performed FPSO vessel model, developed with scale 1:200. It was observed that measured using low-detail model often greater than those high-detail model. The corresponding to Norwegian Maritime Directorate (NMD) profile an exponent 0.14,...