A5032656647- 2D Materials and Applications
- MXene and MAX Phase Materials
- Graphene research and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Electrospun Nanofibers in Biomedical Applications
- Graphene and Nanomaterials Applications
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Organic and Molecular Conductors Research
- Advanced Battery Materials and Technologies
- Perovskite Materials and Applications
- Electrochemical sensors and biosensors
- Catalytic Processes in Materials Science
- CO2 Reduction Techniques and Catalysts
- Polymer Surface Interaction Studies
- Molecular Junctions and Nanostructures
- Electrochemical Analysis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced battery technologies research
- Bone Tissue Engineering Materials
- Transition Metal Oxide Nanomaterials
Sungkyunkwan University
2017-2024
Lawrence Berkeley National Laboratory
2022-2024
Cyclotron (Netherlands)
2022
Suwon Research Institute
2018-2019
Government of the Republic of Korea
2018-2019
This review summarizes organic molecule-based electrode materials for rechargeable batteries.
Coupling renewable electricity to reduce carbon dioxide (CO2) electrochemically into feedstocks offers a promising pathway produce chemical fuels sustainably. While there has been success in developing materials and theory for CO2 reduction, the widespread deployment of electrolyzers hindered by challenges reactor design operational stability due crossover (bi)carbonate salt precipitation. Herein, we asymmetrical bipolar membranes assembled zero-gap electrolyzer fed with pure water, solving...
A novel one‐dimensional (1D) inorganic material, Nb 2 Se 9 , which can be separated into atomic‐level, is synthesized through chemical reaction between and sources. crystals are formed under an excess condition to avoid other phase such as NbSe 3 the residual removed by heat treatment; thus, high‐purity obtained. The one‐atom‐thick level nanochains successfully obtained mechanical exfoliation dispersion in a solvent. covalently bonded chain, when isolated from its three‐dimensional bulk...
Single-atom site catalysts can improve the rates and selectivity of many catalytic reactions. We have modified Pt 1 /CeO 2 single sites by combining them with molecular groups oxygen vacancies support. The new include hydrided (Pt 2+ -Ce 3+ H δ ) hydroxylated OH) that exhibit higher reactivity to previous for several reactions, including a ninefold increase in reaction rate carbon monoxide (CO) oxidation, 2.3-fold improvement propylene oxidative dehydrogenation propane. atomic structure...
Abstract In this work, high‐quality 1D van der Waals (vdW) Nb 2 Pd 3 Se 8 is synthesized, showing an excellent scalability from bulk to single‐ribbon due weakly bonded repeating unit ribbons. The calculation of electronic band structures confirmed that novel a semiconducting material, displaying indirect‐to‐direct bandgap transition with decreasing the number unit‐ribbons single. Field effect transistors (FETs) fabricated on mechanically exfoliated nanowires exhibit n‐type transport...
1D vdW Nb 2 Se 9 is a promising advanced anode material for LIBs due to superior electrochemical performance originating from its unique structural properties, which allow swift transport of Li ions and buffer the volume changes during Li-ion storage.
The synthesis and dispersion of a new one-dimensional (1D) material, V<sub>2</sub>Se<sub>9</sub>, in which chain-shaped molecular units with strong covalent bonds are assembled crystal structure <italic>via</italic> weak van der Waals attraction between chains, were carried out.
Recently, we synthesized a one-dimensional (1D) structure of V2Se9. The 1D V2Se9 resembles another material, Nb2Se9, which is expected to have direct band gap. To determine the potential applications this calculated structures and bulk using density functional theory by varying number chains comparing their electronic properties with those Nb2Se9. results showed that small gap, whereas possesses an indirect like We expect nanowires diameters less than ∼20 Å would gaps. This...
Continuous industrial development has increased the demand of energy. Inevitably, energy sources is steadily progressing using various methods. Rather than establishing a new source, system for storing waste heat generated by industry now been accepted as useful strategy. Among such systems, hydration and dehydration reactions MgO/Mg(OH)2 are eco-friendly, have relatively low toxicity risk, large reserves. Therefore, it promising candidate heat-storage system. In this study,...
Mass production of one-dimensional, V₂Se₉ crystals, was successfully synthesized using the solid-state reaction vanadium and selenium. Through mechanical exfoliation method, bulk crystal easily separated to nanoribbon structure we have confirmed that as-grown crystals consist innumerable single chains linked by van der Waals interaction. The exfoliated flakes can be controlled thickness repeated-peeling method. In addition, atomic thick also obtained on a 300 nm SiO₂/Si substrate. Scanning...
In this study, Mo3Se3– single-chain atomic crystals (SCACs) with atomically small chain diameters of ∼0.6 nm, large surface areas, and mechanical flexibility were synthesized investigated as an extracellular matrix (ECM)-mimicking scaffold material for tissue engineering applications. The proliferation L-929 MC3T3-E1 cell lines increased up to 268.4 ± 24.4% 396.2 8.1%, respectively, after 48 h culturing SCACs. More importantly, extremely high was observed when the cells treated 200 μg mL–1...
As Mo3Se3– chain nanowires have dimensions comparable to those of natural hydrogel chains (molecular-level diameters ∼0.6 nm and lengths several micrometers) excellent mechanical strength flexibility, they large potential reinforce hydrogels improve their properties. When a Mo3Se3–-chain-nanowire-gelatin composite is prepared simply by mixing with gelatin, phase separation the from gelatin matrix occurs in micronetwork, providing only small improvements In contrast, when surface nanowire...
Abstract Low-temperature-processed semiconductors are an emerging need for next-generation scalable electronics, and these to feature large-area fabrication, solution processability, high electrical performance, wide spectral optical absorption properties. Although various strategies of low-temperature-processed n-type have been achieved, the development high-performance p-type at low temperature is still limited. Here, we report a unique method synthesize tellurium nanowire networks...
Materials with physicochemical properties and biological activities similar to those of the natural extracellular matrix are in high demand tissue engineering. In particular, Mo3 Se3- inorganic molecular wire (IMW) is a promising material composed bioessential minerals possess nanometer-scale diameters, negatively charged surfaces, physical flexibility, nanotopography characteristics, which essential for interactions cell membrane proteins. Here, an implantable 3D IMW enhanced...
In this study, chemical vapor deposition of WO3 via graphene-catalyzed thermal transport is utilized to prepare position-selective micro/nanostructures. The effects growth temperature and oxygen concentration on the structure, morphology, surface states, electrical properties are studied. found alter resulting morphology properties. combined application high results in porous nanosheets with active surfaces. prepared for room-temperature NH3 gas sensing, they exhibit good sensitivity,...
The optimum solvent for Nb2Se9 dispersion, which is a new type of one dimensional (1D) material, investigated. Among several solvents (16 in total), strong dispersion was observed benzyl alcohol, isopropyl isobutyl and diacetone have medium dielectric constants the range 10 to 30 surface tension 25 35 mJ m−2. 1D chains, whose size less than nm, are well dispersed it possible disperse mono-chains 1 nm or specific region. unit chain with dangling bond free high volume area ratio expected be...
A novel semiconductor 1D nanomaterial, Nb2Se9, was synthesized on a bulk scale via simple vapor transport reaction between niobium and selenium. Needle-like single crystal Nb2Se9 contains numerous chains linked by van der Waals interactions, we confirmed that bundle of can be easily separated mechanical cleavage. The exfoliated flakes exhibit quasi-two-dimensional layered structure, the number layers controlled using repeated-peeling method. work function varied depending thickness as...
Abstract In this study, high‐purity and centimeter‐scale bulk Ta 2 Ni 3 Se 8 crystals are obtained by controlling the growth temperature stoichiometric ratio between tantalum, nickel, selenium. It is demonstrated that could be effectively exfoliated into a few chain‐scale nanowires through simple mechanical exfoliation liquid‐phase exfoliation. Also, calculation of electronic band structures confirms semiconducting material with small bandgap. A field‐effect transistor successfully...
Abstract Single-atom catalysts (SACs) featuring 100% atom utilization and uniform isolated active sites have been receiving sustainable attention over the last decade, as they offer exceptional performance in various catalytic applications. The motivation behind studying SACs is to develop highly active, selective, stable for industrial applications with desirable economic ecological benefits. Despite their promising potential, face challenges related stability, which need be addressed...
Layered two‐dimensional (2D) transition metal dichalcogenides (TMDCs) often form 2D sheets and some of these show an indirect to direct band gap as the number layers decreases from that bulk structure. Recently, a new one‐dimensional (1D) material Nb 2 Se 9 is successfully prepared by solid state reaction. This semiconducting composed periodically stacked single‐chain atomic crystals (SCAC) where SCACs inorganic due strong bonds within chain but with weak inter‐chain interactions. To...
In recent years, one-dimensional (1D) transition-metal chalcogenide nanowires have been considered as potential candidates to replace noble-metal-based electrocatalyst in water electrolysis because they exhibit high surface area and plenty of exposed chalcogen atoms act active sites. Herein, we report the fabrication noble-metal-free selenium-rich 1D single-chain niobium selenide (Nb2Se9) for efficient hydrogen evolution reaction (HER). The Nb2Se9 is simply prepared by filtration dispersed...