Il‐Ho Kim
YOU?
Author Swipe
View article: Eskebornite CuFeSe2: Solid-State Synthesis and Thermoelectric Properties
Eskebornite CuFeSe2: Solid-State Synthesis and Thermoelectric Properties Open
Eskebornite (CuFeSe2), a member of the I–III–VI2 ternary semiconductor family, was explored in this study as a potential thermoelectric material, offering new insights into its synthesis, structural characteristics, and transport behavior.…
View article: Effects of Ni Doping on Thermoelectric Properties of Chalcopyrite
Effects of Ni Doping on Thermoelectric Properties of Chalcopyrite Open
Chalcopyrite (CuFeS2) has attracted interest as a thermoelectric material due to its narrow bandgap and its ability to tailor its carrier concentration through doping. In this study, we investigated the effects of Ni2+ substitution at Cu+ …
View article: Preparation and Thermoelectric Performance of Non-Stoichiometric Skinnerite
Preparation and Thermoelectric Performance of Non-Stoichiometric Skinnerite Open
Non-stoichiometric skinnerite Cu3+mSbS3 (−0.04 ≤ m ≤ 0.04) was synthesized via mechanical alloying and hot pressing. A phase analysis, microstructural characterization, and thermoelectric property evaluation were conducted to investigate t…
View article: Solid-State Synthesis and Thermoelectric Properties of CuFeSe2–CuFeS2 Solid Solutions
Solid-State Synthesis and Thermoelectric Properties of CuFeSe2–CuFeS2 Solid Solutions Open
Thermoelectric technology, which converts heat and electricity into each other, has been attracting attention from the perspective of efficient energy utilization. Recently, eco-friendly and cost-effective Cu-based thermoelectric materials…
View article: p–n Transition in Thermoelectric Semiconductor Eskebornite
p–n Transition in Thermoelectric Semiconductor Eskebornite Open
Eskebornite (CuFeSe2) is a I–III–VI2 semiconductor with a tetragonal crystal structure, known for its intriguing electrical and magnetic properties. However, experimental studies on this material remain scarce. In this study, Ni-doped eske…
View article: Artificial Graphite-Based Silicon Composite Anodes for Lithium-Ion Batteries
Artificial Graphite-Based Silicon Composite Anodes for Lithium-Ion Batteries Open
To develop an advanced anode for lithium-ion batteries, the electrochemical performance of a novel material comprising a porous artificial carbon (PAC)–Si composite was investigated. To increase the pore size and surface area of the compos…
View article: Chalcopyrite CuFeS2: Solid-State Synthesis and Thermoelectric Properties
Chalcopyrite CuFeS2: Solid-State Synthesis and Thermoelectric Properties Open
The optimal conditions for synthesizing a pure chalcopyrite CuFeS2 phase were thoroughly investigated through the combination of mechanical alloying (MA) and hot pressing (HP) processes. The MA process was performed at a rotational speed o…
View article: Thermoelectric Characteristics of Permingeatite Compounds Double-Doped with Sn and S
Thermoelectric Characteristics of Permingeatite Compounds Double-Doped with Sn and S Open
Sn/S double-doped permingeatites, Cu3Sb1−xSnxSe4−ySy (0.02 ≤ x ≤ 0.08 and 0.25 ≤ y ≤ 0.50) were synthesized, and crystallographic parameters and thermoelectric characteristics were examined as a function of doping level. The lattice parame…
View article: Athermal phonon collection efficiency in diamond crystals for low mass dark matter detection
Athermal phonon collection efficiency in diamond crystals for low mass dark matter detection Open
We explored the efficacy of lab-grown diamonds as potential target materials for the direct detection of sub-GeV dark matter~(DM) using metallic magnetic calorimeters~(MMCs). Diamond, with its excellent phononic properties and the low atom…
View article: Thermoelectric Performance of Non-Stoichiometric Permingeatite Cu3+mSbSe4
Thermoelectric Performance of Non-Stoichiometric Permingeatite Cu3+mSbSe4 Open
Non-stoichiometric permingeatites Cu3+mSbSe4 (−0.04 ≤ m ≤ −0.02) were synthesized, and their thermoelectric properties were examined depending on the Cu deficiency. Phase analysis by X-ray diffraction revealed no detection of secondary pha…
View article: Phase Transitions and Thermoelectric Properties of Charge-Compensated ZnxCu12−xSb4Se13
Phase Transitions and Thermoelectric Properties of Charge-Compensated ZnxCu12−xSb4Se13 Open
In this study, we investigated the phase transitions and thermoelectric properties of charge-compensated hakite (ZnxCu12−xSb4Se13) as a function of Zn content. Based on X-ray diffraction and a differential scanning calorimetric phase analy…
View article: Skutterudite: Reproducibility of Thermoelectric Performance of P-type R<sub>y</sub>Fe<sub>4-x</sub>Co<sub>x</sub>Sb<sub>12</sub> Bulky Compacts
Skutterudite: Reproducibility of Thermoelectric Performance of P-type R<sub>y</sub>Fe<sub>4-x</sub>Co<sub>x</sub>Sb<sub>12</sub> Bulky Compacts Open
Skutterudite compounds have excellent thermoelectric performance in the intermediate-to high temperature range. Their lattice thermal conductivity can be reduced by intensifying phonon scattering through independent vibrations of the guest…
View article: Thermoelectric Chalcostibite: Solid-State Synthesis and Thermal Properties
Thermoelectric Chalcostibite: Solid-State Synthesis and Thermal Properties Open
In this study, thermoelectric chalcostibite (CuSbS2) compounds were fabricated using mechanical alloying (MA) and hot pressing (HP), and phase identification, microstructural observation, and thermal analysis were conducted. The thermal pr…
View article: Uniformity of Thermoelectric Properties of N-type Bi<sub>2</sub>Te<sub>3-y</sub>Se<sub>y</sub> Bulky Compacts
Uniformity of Thermoelectric Properties of N-type Bi<sub>2</sub>Te<sub>3-y</sub>Se<sub>y</sub> Bulky Compacts Open
Because n-type Bi2Te3-based materials exhibit lower thermoelectric performance than p-type materials and because their thermoelectric properties are sensitively changed by the composition and carrier concentration, optimizing these aspects…
View article: Learning Flexible Body Collision Dynamics with Hierarchical Contact Mesh Transformer
Learning Flexible Body Collision Dynamics with Hierarchical Contact Mesh Transformer Open
Recently, many mesh-based graph neural network (GNN) models have been proposed for modeling complex high-dimensional physical systems. Remarkable achievements have been made in significantly reducing the solving time compared to traditiona…
View article: Comparison of adsorption-extraction (AE) workflows for improved measurements of viral and bacterial nucleic acid in untreated wastewater
Comparison of adsorption-extraction (AE) workflows for improved measurements of viral and bacterial nucleic acid in untreated wastewater Open
The lack of standardized methods and large differences in virus concentration and extraction workflows have hampered Severe Acute Respiratory Syndrome (SARS-CoV-2) wastewater surveillance and data reporting practices. Numerous studies have…
View article: Evaluation of colorimetric RT-LAMP for screening of SARS-CoV-2 in untreated wastewater
Evaluation of colorimetric RT-LAMP for screening of SARS-CoV-2 in untreated wastewater Open
This study compared reverse transcription-loop-mediated isothermal amplification (RT-LAMP) and three reverse transcription-quantitative polymerase chain reaction (RT-qPCR) assays targeting the N and E genes of the SARS-CoV-2 genome for det…
View article: Effects of Double Doping Germanium and Indium on the Thermoelectric Properties of Permingeatite
Effects of Double Doping Germanium and Indium on the Thermoelectric Properties of Permingeatite Open
Cu3Sb1–x–yGexInySe4 (0.02 ≤ x ≤ 0.12; 0.04 ≤ y ≤ 0.08) permingeatite compounds doped with Ge and In were prepared using solid-state synthesis. The phases and microstructures were analyzed, and the charge transport and thermoelectric proper…
View article: Improved Thermoelectric Performance of Cu3Sb1−x−ySnxInySe4 Permingeatites Double-Doped with Sn and In
Improved Thermoelectric Performance of Cu3Sb1−x−ySnxInySe4 Permingeatites Double-Doped with Sn and In Open
Cu–Sb–Se ternary chalcogenide compounds composed of earth-abundant low-toxicity elements are attracting attention as economical and ecofriendly semiconductors. Among them, permingeatite (Cu3SbSe4) is a potential thermoelectric material wit…
View article: Bytizite Cu3SbSe3: Solid-State Synthesis and Thermoelectric Performance
Bytizite Cu3SbSe3: Solid-State Synthesis and Thermoelectric Performance Open
Bytizite (Cu3SbSe3 ) has attracted interest as a promising thermoelectric material because of its ultralow thermal conductivity; however, there are few experimental studies. This study investigated the optimal processing conditions for the…
View article: Effects of Sn and In Double-Doping on the Thermoelectric Performance of Cu3Sb1-x-ySnxInyS4 Famatinites
Effects of Sn and In Double-Doping on the Thermoelectric Performance of Cu3Sb1-x-ySnxInyS4 Famatinites Open
Famatinite (Cu3SbS4 ) is a promising p-type thermoelectric material because of its low lattice thermal conductivity and high Seebeck coefficient. In this study, famatinite powders, double-doped with Sn (a BIV group element) and In (a BIII …
View article: Solid-State Synthesis and Thermoelectric Performance of Cu3Sb1−yBIII ySe4 (BIII = Al, In) Permingeatites
Solid-State Synthesis and Thermoelectric Performance of Cu3Sb1−yBIII ySe4 (BIII = Al, In) Permingeatites Open
Permingeatite (Cu3SbSe4) is a promising thermoelectric material with narrow bandgap energy and large carrier effective mass. However, doping is required to improve its electrical conductivity and thermoelectric properties. In this study, C…
View article: Phase, Crystal Structure, and Thermoelectric Performance of Cubic Skinnerite Cu3Sb1-yFeyS3 Synthesized by Mechanical Alloying
Phase, Crystal Structure, and Thermoelectric Performance of Cubic Skinnerite Cu3Sb1-yFeyS3 Synthesized by Mechanical Alloying Open
Skinnerite (Cu3SbS3) has recently attracted attention as a promising thermoelectric material because of its low thermal conductivity. In this study, we performed the solid-state synthesis of Fe-doped skinnerite Cu3Sb1-yFeyS3 (y = 0.02−0.06…
View article: Enhanced Thermoelectric Performance of Sn-Doped Permingeatites Cu<sub>3</sub>Sb<sub>1-y</sub>Sn<sub>y</sub>Se<sub>4</sub>
Enhanced Thermoelectric Performance of Sn-Doped Permingeatites Cu<sub>3</sub>Sb<sub>1-y</sub>Sn<sub>y</sub>Se<sub>4</sub> Open
In this study, Cu3Sb1-ySnySe4 (0 ≤ y ≤ 0.08) permingeatites were synthesized via mechanical alloying followed by hot pressing. The phase transformation, microstructure, charge transport parameters of the permingeatites, and their thermoele…
View article: Enhanced Thermoelectric Performance of Sn-Doped Permingeatites Cu3Sb1-ySnySe4
Enhanced Thermoelectric Performance of Sn-Doped Permingeatites Cu3Sb1-ySnySe4 Open
In this study, Cu3Sb1-ySnySe4 (0 ≤ y ≤ 0.08) permingeatites were synthesized via mechanical alloying followed by hot pressing. The phase transformation, microstructure, charge transport parameters of the permingeatites, and their thermoele…
View article: A Fixed-Film Bio-Media Process Used for Biological Nitrogen Removal from Sewage Treatment Plant
A Fixed-Film Bio-Media Process Used for Biological Nitrogen Removal from Sewage Treatment Plant Open
In this study, a lab-scale fixed-film bio-media process was developed and operated to evaluate nitrogen removal from domestic sewage treatment plants. For nitrogen removal, the fixed-film bio-media process was applied in series with anaero…
View article: Thermoelectric Performance of Sn and Bi Double-Doped Permingeatite
Thermoelectric Performance of Sn and Bi Double-Doped Permingeatite Open
In this study, mechanical alloying was performed to synthesize permingeatite Cu3Sb1-x-ySnxBiySe4 (0.02 ≤ x ≤ 0.06 and 0.02 ≤ y ≤ 0.04) doped with Sn and Bi. Hot pressing was subsequently conducted to achieve dense sintered bodies. When the…