A5101962527- Gas Sensing Nanomaterials and Sensors
- Concrete and Cement Materials Research
- Advanced Chemical Sensor Technologies
- Concrete Corrosion and Durability
- Analytical Chemistry and Sensors
- Corrosion Behavior and Inhibition
- Electrochemical sensors and biosensors
- Advanced MEMS and NEMS Technologies
- Recycled Aggregate Concrete Performance
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Water Quality Monitoring and Analysis
- Advanced Energy Technologies and Civil Engineering Innovations
- Electrocatalysts for Energy Conversion
- Electrokinetic Soil Remediation Techniques
- Advanced Machining and Optimization Techniques
- Surface Treatment and Coatings
- Electrical and Thermal Properties of Materials
- Lower Extremity Biomechanics and Pathologies
- Smart Materials for Construction
- Polymer Nanocomposite Synthesis and Irradiation
- Engineering Technology and Methodologies
- Foot and Ankle Surgery
- Advanced Fiber Optic Sensors
- Innovative concrete reinforcement materials
Korea University
2018-2024
Seoul Institute
2021
Government of the Republic of Korea
2021
Hyundai Motor Group (South Korea)
2020
Hanyang University
2015-2018
Inha University
2017
Uijeongbu St. Mary's Hospital
2015
Catholic University of Korea
2015
Korea Institute of Civil Engineering and Building Technology
2011-2013
Doosan Heavy Industries & Construction (South Korea)
2009
A highly selective and sensitive detection of the plant hormone ethylene, particularly at low concentrations, is essential for controlling growth, development, senescence plants, as well ripening fruits. However, this remains challenging because non-polarity reactivity ethylene. Herein, a strategy detecting ethylene sub-ppm-level proposed by using oxide semiconductor chemiresistors with nanoscale catalytic overlayer. The SnO2 sensor coated Cr2O3 overlayer exhibits rapid sensing kinetics,...
To investigate the correlation between Foot Posture Index (FPI) (including talar head palpation, curvature at lateral malleoli, inversion/eversion of calcaneus, talonavicular bulging, congruence medical longitudinal arch, and abduction/adduction forefoot on rare foot), plantar pressure distribution, pediatric flatfoot radiographic findings.Nineteen children with (age, 9.32±2.67 years) were included as study group. Eight segments measured GaitView platform pad FPI was in children. The four...
Highly sensitive, selective and humidity-independent detection of trimethylamine was achieved using p-type semiconducting pure Pr-doped Ce<sub>4</sub>W<sub>9</sub>O<sub>33</sub>.
Abstract The precise and reversible detection of hydrogen sulfide (H 2 S) at high humidity condition, a malodorous harmful volatile sulfur compound, is essential for the self‐assessment oral diseases, halitosis, asthma. However, selective trace concentrations H S (≈0.1 ppm) in conditions (exhaled breath) challenging because irreversible adsorption/desorption surface chemiresistors. study reports synthesis Fe‐doped CuO hollow spheres as gas‐sensing materials via spray pyrolysis. 4 at.%...
The present study concerns the influence of C 3 A in cement on chloride transport reinforced concrete. Three modified was manufactured variation content, ranging from 6.0 and 10.5 up to 16.9%. setting time fresh concrete measured immediately after mixing, together with temperature at initial set. For properties hardened A, a development compressive strength permeation were using mortar specimens. Simultaneously, binding capacity by water extraction method. To ensure pore structure transport,...
Abstract The plasma source ion implantation technique was applied to modify the surface of ethylene‐vinyl alcohol (EVOH) film using various working gases. effects treated films were observed on adhesion efficiency and physical properties. hydrophobic properties EVOH greatly enhanced after tetrafluoromethane‐plasma (PSII) treatment. On other hand, higher hydrophilic increased oxygen‐PSII results X‐ray photoelectron spectroscopy showed that improved or closely related formation...
Transition metal oxides are considered alternative electrocatalysts for ZAB owing to their multiple oxidation states. However, they have limitations such as low electrical conductivity and the deficiency of reactive sites. In this study, overcome these shortcomings improve electrocatalytic activity, oxygen vacancies porous architectures were introduced through a partial reduction process carbon framework. Open microspheres with uniformly loaded NiCo2O4 nanosheets (V-NCO/OPC) displayed...
In article number 1903093, Jong-Heun Lee and co-workers describe exclusive detection of sub-ppm-level ethylene, a representative plant hormone, using bilayer sensors. The sensor can be widely used for real-time assessment fruit freshness/ripening or the control growth/development.
The facile and affordable fabrication of sensors that can detect carcinogenic benzene has remained a long-standing challenge, as sophisticated nano-architectures and/or sensing films are essential to ensure selectivity. Herein, we report raisin bread-structured film fabricated by mixing two different types oxide hollow spheres, novel, cost-effective platform for the highly selective sensitive detection benzene. comprises catalytic Pd-Co3O4 (i.e., raisins) gas-sensing SnO2 spheres bread),...
The speed of chloride penetration caused by cracking at the concrete surface is determined crack width. In this study, impact cracks that can occur on (occurring from contraction during curing) was revealed through modeling. accuracy established model also verified laboratory testing. definition minimum width affects established, based testing and consideration literature. comparison widths (20, 85, 125μm) profile prediction showed there virtually no 20 μm, while increased sharply 85 μm 125 μm.
Concrete structures such as LILW waste disposal facility located near the sea may suffer from chloride attack damages. This study aims to analysis mock-up test for acceleration corrosion of reinforcing bar and its deterioration in concrete by XRD diffusion coefficient. Corrosion experiment has been developed used evaluate effect caused seawater on engineered barrier facility.