A5043774190- Gas Sensing Nanomaterials and Sensors
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Sensors
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Photocatalysis Techniques
- Copper-based nanomaterials and applications
- Conducting polymers and applications
- Pharmacological Effects and Assays
- ZnO doping and properties
- Polydiacetylene-based materials and applications
- Advanced Sensor and Energy Harvesting Materials
- Electrochemical sensors and biosensors
- Transition Metal Oxide Nanomaterials
- Genetic and phenotypic traits in livestock
- Advanced Battery Technologies Research
- Molecular Sensors and Ion Detection
- Sulfur Compounds in Biology
- Advanced Memory and Neural Computing
- Water Quality Monitoring and Analysis
Massachusetts Institute of Technology
2022-2024
Korea University
2017-2023
Center Point
2020
National Center for Environmental Health
2020
National Institute for Occupational Safety and Health
2020
Research Triangle Park Foundation
2020
National Institute of Environmental Health Sciences
2020
Association of Occupational and Environmental Clinics
2020
The American College
2020
American College of Financial Services
2020
Formaldehyde, a probable carcinogen, is ubiquitous indoor pollutant, but its highly selective detection has been long-standing challenge. Herein, chemiresistive sensor that can detect ppb-level formaldehyde in an exclusive manner at room temperature designed. The TiO2 exhibits under UV illumination of and ethanol with negligible cross-responses to other pollutants. coating mixed matrix membrane (MMM) composed zeolitic imidazole framework (ZIF-7) nanoparticles polymers on sensing films...
Metal-organic frameworks (MOFs) are promising materials for gas sensing but often limited to single-use detection. A hybridization strategy is demonstrated synergistically deploying conductive MOFs (cMOFs) and polymers (cPs) as two complementary mixed ionic-electronic conductors in high-performing stand-alone chemiresistors. This work presents significant improvement i) sensor recovery kinetics, ii) cycling stability, iii) dynamic range at room temperature. The effect of across well-studied...
Nearly monodisperse hollow hierarchical Co3O4 nanocages of four different sizes (∼0.3, 1.0, 2.0, and 4.0 μm) consisting nanosheets were prepared by controlled precipitation zeolitic imidazolate framework-67 (ZIF-67) rhombic dodecahedra, followed solvothermal synthesis using ZIF-67 self-sacrificial templates, subsequent heat treatment for the development high-performance methylbenzene sensors. The sensor based on with size ∼1.0 μm exhibited not only ultrahigh responses (resistance ratios) to...
Metal–organic frameworks (MOFs) with high surface area, tunable porosity, and diverse structures are promising platforms for chemiresistors; however, they often exhibit low sensitivity, poor selectivity, irreversibility in gas sensing, hindering their practical applications. Herein, we report that hybrids of Cu3(HHTP)2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) nanoflakes Fe2O3 nanoparticles highly sensitive, selective, reversible detection NO2 at 20 °C. The key parameters to determine...
Abstract Volatile aromatic compounds are major air pollutants, and their health impacts should be assessed accurately based on the concentration composition of gas mixtures. Herein, novel bilayer sensors consisting a SnO 2 sensing layer three different x Rh‐TiO catalytic overlayers ( = 0.5, 1, wt%) designed for new functionalities such as selective detection, discrimination, analysis benzene, toluene, p ‐xylene. The 2Rh‐TiO /SnO sensor shows high selectivity response toward ppm‐...
In the presence of water, electrically conductive metal-organic framework (MOF) Cu
Real-time breath isoprene sensing provides noninvasive methods for monitoring human metabolism and early diagnosis of cardiovascular diseases. Nonetheless, the stable alkene structure high humidity hinder sensitive selective detection. In this work, we derived well-defined Co3O4@polyoxometalate yolk-shell structures using a metal-organic framework template. The inner space, including highly catalytic Co3O4 yolks surrounded by semipermeable polyoxometalate shell, enables to be reformed...
The highly selective detection of trace gases using transparent sensors at room temperature remains challenging. Herein, nanopatterned chemiresistors composed aligned 1D Au-SnO2 nanofibers, which can detect toxic NO2 gas under visible light illumination is reported. Ten straight nanofibers are patterned on a glass substrate with electrodes assisted by direct-write, near-field electrospinning, whose extremely low coverage sensing materials (≈0.3%) lead to the high transparency (≈93%) sensor....
On-demand, direct-write fabrication of metal oxide patterns composed one-dimensional nanofibers using near-field electrospinning is demonstrated and their formation mechanism as well potential applications are investigated.
M 3 (hexahydroxytriphenylene) 2 (M = Ni, Co, Cu; hexahydroxytriphenylene (HHTP)) was uniformly coated onto BiVO 4 thin films via a facile solvothermal process, and the photoelectrochemical performance of /M (HHTP) photoanodes investigated.
Pure In2O3, 0.5 and 1.0 wt% Mg doped In2O3 hollow spheres were synthesized by ultrasonic spray pyrolysis of a solution containing In-, Mg-nitrate sucrose their gas sensing characteristics to 5 ppm C2H5OH, p-xylene, toluene, HCHO measured at 250, 300 350°C. Although the addition decreases specific surface area volume meso-pores, response (resistance ratio) C2H5OH 350°C (69.4) was significantly higher than that pure (24.4). In addition, showed highest selectivity C2H5OH. This attributed...
Metal-organic frameworks (MOFs) are promising materials for gas sensing but often limited to single-use detection. We demonstrate a hybridization strategy synergistically deploying conductive MOFs (cMOFs) and polymers (cPs) as two complementary mixed ionic-electronic conductors in high-performing stand-alone chemiresistors. Our work presents significant improvement i) sensor recovery kinetics, ii) cycling stability, iii) dynamic range at room temperature. the effect of across well-studied...
This toxicological profile is prepared in accordance with guidelines developed
Misfueling accidents significantly damage the engines of both gasoline and diesel vehicles, should be avoided by rapid accurate fuel discrimination. Gasoline contains bioethanol. Thus, detection ethanol vapor produced can used to distinguish between diesel. In present study, Pt-doped SnO2 hollow nanospheres, Mg-doped In2O3 microspheres, ZnO nanostructures have been as gas sensors discriminate fuels. All three are able detect gases evaporating from Among sensors, microspheres show a...
In article number 2100438, Jong-Heun Lee and co-workers report transparent gas sensors composed of aligned one-dimensional Au–SnO2 nanofibers with extremely low coverage, electrode, glass substrate, which can detect harmful NO2 at room temperature under visible light illumination or natural sunlight. The sensor design enables the unnoticeable installation on windows without external heaters sources.