A5103036804- Concrete and Cement Materials Research
- Hydrogen Storage and Materials
- Superconductivity in MgB2 and Alloys
- Building materials and conservation
- Bone Tissue Engineering Materials
- Advancements in Battery Materials
- Material Properties and Failure Mechanisms
- Magnesium Oxide Properties and Applications
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced ceramic materials synthesis
- Advanced Combustion Engine Technologies
- Innovations in Concrete and Construction Materials
- Metal and Thin Film Mechanics
- CO2 Sequestration and Geologic Interactions
- Semiconductor Quantum Structures and Devices
- Calcium Carbonate Crystallization and Inhibition
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Corrosion Behavior and Inhibition
- Mesoporous Materials and Catalysis
- Graphene research and applications
- Fiber-reinforced polymer composites
- Advanced Aircraft Design and Technologies
- Copper Interconnects and Reliability
- Rocket and propulsion systems research
Korea Advanced Institute of Science and Technology
1981-2025
Kootenay Association for Science & Technology
2025
Rice University
2016-2020
Korea Institute of Science and Technology
1981-2013
Inha University
2006
Pohang University of Science and Technology
2005
Korea Research Institute of Ships and Ocean Engineering
1991
As the most widely used synthetic material on planet, concrete poses a serious societal concern regarding its significant environmental footprint.
Conductive epoxy composites are of great interest due to their applications in electronics. They usually made by mixing powdered conductive fillers with epoxy. However, the conductivity composite is limited low filler content because increasing causes processing difficulties and reduces mechanical properties host. We describe here use ultra-stiff graphene foams (uGFs) as three-dimensional (3D) continuous for resins. The powder metallurgy method was used produce dense uGFs monoliths that...
Many natural materials, such as nacre and dentin, exhibit multifunctional mechanical properties via structural interplay between compliant stiff constituents arranged in a particular architecture. Herein, we present, for the first time, bottom-up synthesis design of strong, tough, self-healing composite using simple but universal spherical building blocks. Our system is composed calcium silicate porous nanoparticles with unprecedented monodispersity over particle size, shape, pore which...
Nature-inspired ensemble of organic and inorganic constituents, such as that found in the microstructure nacre dactyl clubs Mantis shrimp, has evolved into model system for structural design industrial composites. This novel concept, which helps attaining balance between strength, toughness ductility, not only induced a paradigm shift synthesis advanced materials graphene-based composites but also, development more abundant, low-cost cement concretes. The advance synthetic techniques advent...
Scaffolded porous submicron particles with well-defined diameter, shape, and pore size have profound impacts on drug delivery, bone-tissue replacement, catalysis, sensors, photonic crystals, self-healing materials. However, understanding the interplay between size, particle mechanical properties of such ultrafine particles, especially at level individual their ensemble states, is a challenge. Herein, we focus calcium-silicate various diameters—as model system—and perform extensive 900+...
Abstract Despite the myriad of research efforts on exploiting fly ash as an alternative binder, its current role in industry is largely restricted to supplementary use, which enables only partial replacement conventional portland cement. Herein, we propose unprecedented binder composite with promising early‐age strength, cost‐effective and reduces CO 2 footprint compared The major constituent occupying 76.4%‐80.3% by total mass constituents, while calcium oxide, nanosilica, minimum amounts...
Calcium silicate (CS)-based materials are ubiquitous in diverse industries ranging from cementitious to bone tissue engineering and drug delivery. As a symbolic example, concrete is the most widely used synthetic material on planet. This large consumption entails significant negative environmental footprint, which calls for innovative strategies develop greener with improved properties (to do more less). Herein, we focus physicochemical of novel spherical calcium particles an extremely...
Abstract Thermal treatment of In 0.5 Ga As/GaAs quantum dot infrared photodetector (QDIP) structure has been carried out at 700 °C for 1 min with SiO 2 capping layer. QDIP induced a blue-shift in its photoluminescence (PL) spectrum by 50 meV reduction intensity. The PL and the intensity is thought to be due interdiffusion interfaces dots (QDs) GaAs barriers. fabricated thermally treated showed red-shift photocurrent 22 meV from peak 200 meV as-grown QDIP, as consequence QD bandgap.
This paper describes the vibration simulation result of washing machine. The machine mainly consists spinning basket, tub which is connected by shaft, and four supporting rods from tub. basket utilizes liquid balancer to control unbalance force. Therefore, one points for modeling construction method balancer. performance comparison with experimental result. As has a good agreement result, it possible predict transient procedure during course.
Micro gas turbines are designed with low turbine inlet temperature and pressure ratio. To overcome the efficiency defect of simple cycle, adoption recuperator is an inevitable choice. In addition to design performance, we should also pay attention off-design performance since they usually operate at part-load conditions for a considerable amount their lifetime. This study analyzes characteristics micro addresses importance recuperation process during part load operation. Comparative analyses...
In order to fully address the characteristics of alternative recuperated cycle with divided turbine expansion, both design and off-design analyses have been performed. Two types mechanical are assumed: two shaft single shaft. particular, optimal pressure ratio division between high- low-pressure turbines is evaluated for single-shaft configuration. It predicted that hardly exhibits sensible efficiency advantage over conventional moderate inlet conditions usual component performances. An...
Addressing the nature of interaction at LiBH4-carbon interface is key to unveiling mechanism for carbon-facilitated desorption lithium borohydride (LiBH4). Density functional theory calculations, taking into account long range dispersion forces, have been performed explore between LiBH4, in form either a monomer unit or crystalline bulk, and two-dimensional (2D) substrate, represented by graphene hexagonal boron nitride. At monomer-2D contact, permanent dipole LiBH4 induces polarization pi...
In order to fully address the characteristics of alternative recuperated cycle with divided turbine expansion, both design and off-design analyses have been performed. Two types mechanical are assumed: two-shaft single-shaft. particular, optimal pressure ratio division between high low turbines is evaluated for single shaft configuration. It predicted that hardly exhibits sensible efficiency advantage over conventional moderate inlet conditions usual component performances. An thermal less...
Summary form only given, as follows. given. Intermixing effects of MBE (Molecular Beam Epitaxy) grown InGaAs SAQDs (Self-Assembled Quantum Dots) covered with SiO/sub 2/ dielectric capping layers, which was by PECVD, were investigated. After the thermal annealing, photoluminescence (PL) measurement has been carried for optical characterization at room temperature quantum well PECVD-grown layer.