A5001505424- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Fossil Insects in Amber
- Semiconductor materials and devices
- Ecology and Conservation Studies
- Insect and Pesticide Research
- Semiconductor materials and interfaces
- Advancements in Semiconductor Devices and Circuit Design
- Copper Interconnects and Reliability
- Diverse Approaches in Healthcare and Education Studies
- Nanowire Synthesis and Applications
- Allergic Rhinitis and Sensitization
- Animal and Plant Science Education
- Electronic Packaging and Soldering Technologies
- Agriculture, Soil, Plant Science
- Topological Materials and Phenomena
- Asthma and respiratory diseases
- ZnO doping and properties
- Thin-Film Transistor Technologies
- Hymenoptera taxonomy and phylogeny
- Metal and Thin Film Mechanics
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Sinusitis and nasal conditions
- Analytical Chemistry and Chromatography
Stanford University
2022-2025
Dongnam Health University
2022-2024
Korea Foundation for Max Planck POSTECH
2020-2022
Pohang University of Science and Technology
2020-2022
Agency for Defense Development
2020-2022
Korea University
1999-2021
Yong In University
2020
National Institute of Ecology
2016-2017
Andong National University
2012-2016
Catholic University of Daegu
2011-2015
Three new species of the genus Symmorphus Wesmael, 1836 are described with materials from South Korea and Far eastern Russia: kurzenkoi Kim sp. nov., S. truncatoclypeus yamanei nov. All members subgenus Wesmael 1836. is likely to be closely related fuscipes in having well developed completely closed propodeal submedian carina, but clearly different latter shape metasomal tergum 1 that not markedly narrowed toward base. Within murarius group proposed by Cumming 1989, unique a clypeus apical...
Abstract This is the first report of occurrence Vespa velutina Lepeletier from Korea. The diagnosis and taxonomic relationship between geographical subspecies provided, with a revised key to complement previous information Korean species. ecological aspect species also discussed.
ABSTRACT Repellent efficacies of two natural aroma compounds, citronella and citronellal, against mosquitoes, Culex pipiens pallens , were evaluated both in field vitro. In vitro the experiment was conducted with three controlled bands impregnated 30% extract, 15% extract citronellal field. Data obtained by means counting numbers bitten mosquitoes per unit time, namely human bait method. Percentage repellencies above calculated at 86%, 73%, 78%, respectively 80% field, showing high repellent...
We demonstrate contact resistivity reduction by inserting an Ar plasma-treated TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2-x</sub> heavily doped interfacial layer to metal/semiconductor overcome a Fermi-level pinning problem on germanium (Ge). A specific of 3.16 × 10 <sup xmlns:xlink="http://www.w3.org/1999/xlink">-3</sup> Ω · cm xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> moderately n-type Ge substrate (6...
For the first time, a novel analytical model of contact resistance (<inline-formula> <tex-math notation="LaTeX">${R}_{\text{contact}}$ </tex-math></inline-formula>) in vertically stacked nanosheet FETs (NSHFETs) with silicide/Si (100) for sub-3-nm node is presented. Generally, <inline-formula> </tex-math></inline-formula> consists interface notation="LaTeX">${R}_{\text{interface}}$ and spreading notation="LaTeX">${R}_{\text{spread}}$ </tex-math></inline-formula>). Herein, new contact, which...
Self-heating and related degradation in performance reliability are serious concerns realizing higher output power density microwave amplifiers. We demonstrated the integration of polycrystalline diamond on a fully fabricated metal-polar Schottky-gated AlGaN/GaN transistor for device-level cooling solution. The thermal budget process is carefully optimized so as not to degrade electrical device. Gate resistance thermometry measurement performed 1 × 200 μm2 device showed an average 111 °C...
Abstract The number of social hymenoptera have decreased due to accelerated urbanization in S eoul, K orea, during the 1970s–1990s. However, recent changes environmental conditions brought distinct re‐growth their colonies. In this study, we analyzed re‐colonization trend eoul with moving‐out reports submitted 119 rescue services from 2000 2009. A total 14 253 findings and treatment cases were reported that time, numbers increased continuously every year. Among them, 87% related wasps 13%...
This study investigates the effect of oxygen plasma (PO) on crystalline structure tellurium (Te) thin films during reactive sputtering. Introduction radicals suppresses uncontrolled rapid growth hexagonal Te crystals, amorphizing deposited film. amorphous phase changes to upon alumina encapsulation. A 4-nm-thick transistor with a PO 7% exhibits outstanding device performances, field-effect mobility up 40.8 cm2V−1s−1 and an on/off current modulation ratio <inline-formula...
We demonstrate Fermi-level unpinning and contact resistance reduction by surface passivation using SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> plasma treatment of a metal/germanium (Ge) contact. A specific resistivity (Pc) 1.14 × 10 <sup xmlns:xlink="http://www.w3.org/1999/xlink">-3</sup> Ω · cm xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> 0.31 eV Schottky barrier height is achieved for Ti/SF -treated n-type Ge (n-Ge) (Nd =...
We present a new model to demonstrate the effect of heavily doped interfacial layer (IL) insertion on contact resistivity reduction in metal-germanium (Ge) structure. It is found that doping IL results lowering Schottky barrier Ge significantly, and based this effect, metal-IL-semiconductor newly proposed. From model, abrupt observed condition as thickness increased, minimum for 1 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">20</sup> cm...
The layered vanadium antimonides AV3Sb5 (A = K, Rb, Cs) are a recently discovered family of topological kagome metals with rich phenomenology strongly correlated electronic phases including charge order and superconductivity. Understanding how the singularities inherent to structure linked observed many-body is topic great interest relevance. Here, we combine angle-resolved photoemission spectroscopy density functional theory reveal multiple kagome-derived van Hove (vHs) coexisting near...
Abstract Antiferromagnetic-paraelectric SrMnO 3 (SMO) has aroused interest because of the theoretical strong coupling between ferroelectric and ferromagnetic states with increasing epitaxial strain. In strained SMO films, <110> polarized state polar distortions have been observed, although high leakage currents air degradation limited their experimental verification. We herein provide a conclusive demonstration room-temperature ferroelectricity dielectric constant ( ε r = 138.1) in...
Bee venom (BV) has been used as an anti-inflammatory and immune modulating agent in Oriental medicine. This study a mouse model to investigate the anti-allergic effect of BV, which is treatment various inflammatory diseases traditional BV was obtained from National Institute Agricultural Science Technology Korea. Female BALB/C mice were sensitized by intraperitoneal injection ovalbumin (OVA). administered nasally prior intranasal instillation OVA. Allergic behavior, serum OVA-specific...
In this study, we examine the effect of oxygen vacancies ( V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">O</sub> ) near back surface p-type tin monoxide (SnO) semiconductors on device performance its thin-film transistors (TFTs). Non-stoichiometry SnO layer was controlled through oxidant exposure conditions during alumina (Al xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> growth using...
The impact of process-induced random dopant fluctuation (RDF)-induced threshold voltage (Vth) variation on the performance 7-nm n-type germanium (Ge) FinFETs with and without a metal-interlayer-semiconductor (MIS) source/drain (S/D) structure is investigated using 3-D TCAD simulations. In order to reduce RDF-induced V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sub> variation, an MIS S/D heavily doped zinc oxide (ZnO) interlayer used in...
In this Letter, we report a demonstration of p-channel tin monoxide (SnO) thin-film transistors (TFTs) with high field-effect mobility (μFE) exceeding 10 cm2/Vs and hysteresis-free like behavior. We demonstrate that maintaining metallic states before encapsulation is key process to enhance μFE in p-type SnO thin-films. Sustaining meta-stability involves the following two processes during fabrication: (1) postdeposition annealing (PDA) steps (2) middle each PDA. This simple not only...
We demonstrate the use of germanium passivation in conjunction with a ZnO interlayer metal-interlayer- semiconductor structure source/drain (S/D) contact. The Fermi-level pinning problem resulting large contact resistances S/D contacts is effectively alleviated by inserting thin Ge layer and interlayer, passivating GaAs surface reducing metal-induced gap states on surface, respectively. specific resistivity for Ti/ZnO/Ge/n-GaAs (~2 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Vespa binghami Vecht, a poorly known vespine species, was discovered in Korea. This is the second treatment of this species on Korean peninsula since first report occurrence by Virula 1925; however, one based practical distributional information. Diagnostic description and digital images are provided.
We demonstrate the effect of SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> plasma passivation with a ZnO interlayer in metal-interlayer-semiconductor (MIS) structure to reduce source/drain (S/D) contact resistance. The interface trap states and metal-induced gap causing Fermi-level pinning problem are effectively alleviated by passivating GaAs surface treatment inserting thin interlayer, respectively. Specific resistivity exhibits...
Elampus bidens (<TEX>$F\ddot{o}rster$</TEX>) is reported from Korea. The genus and species are new to This easily distinguished by a pair of processes on apical margin metasomal tergum III. A checklist the 45 current valid Korean placed in family Chrysididae presented. key subfamilies, tribes, genera also provided.