A5049383637- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Luminescence Properties of Advanced Materials
- Luminescence and Fluorescent Materials
- Molecular Sensors and Ion Detection
- Advanced Sensor and Energy Harvesting Materials
- Analytical Chemistry and Sensors
- Radiation Detection and Scintillator Technologies
- Extraction and Separation Processes
- Supramolecular Chemistry and Complexes
- Conducting polymers and applications
- Glass properties and applications
- Graphene research and applications
- Perovskite Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Ionic liquids properties and applications
- Diamond and Carbon-based Materials Research
- Microwave Dielectric Ceramics Synthesis
- Fiber-reinforced polymer composites
- Thermal Expansion and Ionic Conductivity
- Ecology and Conservation Studies
- Electronic and Structural Properties of Oxides
- Photorefractive and Nonlinear Optics
- Chemical Synthesis and Characterization
- Synthesis and properties of polymers
Pukyong National University
2014-2025
Texas A&M University
2019-2024
Gyeongsang National University
2017-2024
University of Mississippi
2024
Texas Tech University
2024
Jackson Memorial Hospital
2024
University of Mississippi Medical Center
2024
U.S. Army Engineer Research and Development Center
2024
International University of Korea
2019
Korea University
2017-2018
As part of increased efforts to develop wearable healthcare devices for monitoring and managing physiological metabolic information, stretchable electrochemical sweat sensors have been investigated. In this study, we report on the fabrication a skin-attachable sensor detecting glucose pH in sweat. A patterned electrode was fabricated via layer-by-layer deposition carbon nanotubes (CNTs) top Au nanosheets (AuNS) prepared by filtration onto substrate. For detection pH, CoWO4/CNT...
Abstract This study reports on the fabrication of pressure/temperature/strain sensors and all‐solid‐state flexible supercapacitors using only polydimethylsiloxane coated microporous polypyrrole/graphene foam composite (PDMS/PPy/GF) as a common material. A dual‐mode sensor is designed with PDMS/PPy/GF, which measures pressure temperature changes current voltage, respectively, without interference to each other. The fabricated shows high sensitivity, fast response/recovery, durability during...
In this study, we demonstrate the fabrication of a highly sensitive flexible temperature sensor with bioinspired octopus-mimicking adhesive. A resistor-type consisting composite poly(N-isopropylacrylamide) (pNIPAM)-temperature hydrogel, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, and carbon nanotubes exhibits very high thermal sensitivity 2.6%·°C-1 between 25 40 °C so that change in skin 0.5 can be accurately detected. At same time, polydimethylsiloxane adhesive layer rim...
LiCl is a classic "hard" ion salt that present in lithium-rich brines and key component end-of-life materials (that is, used lithium-ion batteries). Its isolation purification from like salts recognized challenge with potential strategic economic implications. Herein, we describe two ditopic calix[4]pyrrole-based ion-pair receptors (2 3), are capable of selectively capturing LiCl. Under solid-liquid extraction conditions, using 2 as the extractant, could be separated NaCl/KCl mixture...
Body-attachable sensors can be applied to electronic skin (e-skin) as well safety forewarning and health monitoring systems. However, achieving facile fabrication of high-performance, cost-effective with mechanical stability in response deformation due body movement is challenging. Herein we report the material design, characteristics a skin-like stretchable array multi-functional (MF) based on single sensing polyurethane foam coated multi-walled carbon nanotube/polyaniline nanocomposite,...
The lanthanide-doped up-conversion (UC) nanocrystals exhibit unique luminescence properties, such as the conversion of near-infrared long wavelength excitation into short visible emission. These UC nanoparticles symbolize a new class phosphor materials. Recently, have been developed biological for various applications including bio-imaging, drug delivery, and sensing which require low auto-fluorescence background, large anti-Stokes shifts, sharp emission bandwidths, high resistance to...
A molecular cage, macrobicycle 2, containing amide and pyrrole groups as hydrogen-bonding donors imine acceptors has been synthesized. Compound 2 was found to recognize tetrahedral oxyanions with high affinities, such H2PO4–, HSO4–, SO42–, HP2O73–, well the spherical halide anions, in chloroform. single-crystal X-ray diffraction analysis revealed that compound formed a 1:1 complex H2PO4– solid state.
The observation of superconductivity in antiperovskite Sr3SnO crystals has sparked significant interest understanding its underlying mechanism and fabricating them thin film forms. To date, molecular beam epitaxy been used to prepare films, but not observed. Sr deficiency subsequent hole doping have suggested as crucial for the emergent superconductivity, difficulty sample preparation due high chemical instability this material system posed challenges systematic extensive studies. In study,...
A small molecular cage (<bold>4</bold>) with high affinity and complete selectivity for fluoride to the limit of detection over other competing anions was synthesized.
A molecular capsule (1) consisting of two calix[4]pyrroles connected via ethylene diamide linkers has been prepared as an anion receptor. 1H NMR spectroscopic studies carried out in CD2Cl2 revealed that receptor 1 recognizes a variety anions with different binding modes and stoichiometries. For instance, binds fluoride acetate 1:2 receptor/anion stoichiometry other test 1:1 solution when their respective tetrabutylammonium (TBA+) salts were used. In contrast, tetraethylammnium (TEA+) salts,...
In this report, we investigate the rapid heating ability of laser-induced graphene (LIG) in response to radio frequency (RF) fields. Graphitic structures were produced from various industrially prevalent thermoplastics via laser irradiation polymer surface. We find that RF responsive, graphitic may be Kapton, polyether imide (PEI), sulfone (PESU), ether ketone (PEEK), and polycarbonate (PC) using a conventional cutting machine. The are also electrically conductive addition being responsive....
Microstructure and composition significantly influence the physical properties of thin films. Therefore, these can be adapted to enhance functionality films for practical applications. Herein, anomalous microstructural evolution sputtered GeO 2 based on postdepositional heat treatments is reported. Temperature‐dependent variations are investigated systematically via a combinatorial treatment employing natural thermal gradient in tube furnace. Heat under an oxidizing atmosphere results...
Novel organic–inorganic hybrid materials of 3-acryloxypropyl trimethoxysilane and 4,4′-(hexafluoroisopropylidene)diphenol were synthesized by non-hydrolytic sol–gel processing. Thick, crack-free films produced spin-coating without high volume shrinkage during further treatment the films. The optical properties precisely tailored adjusting chemical composition materials. tunability refractive index allowed us to fabricate step-index waveguide structures with well-defined reproducible...
Herein, radio frequency (RF) Joule heating is used to trigger dynamic covalent bond exchange in a furan‐maleimide Diels–Alder polymer (DAP). Prior work shows that carbon susceptors can be incorporated into materials and undergo when exposed an electric field. nanotubes (CNTs) are added the DAP make material responsive RF fields, enable selective, noncontact healing behavior of after field exposure. After healing, mechanical testing conducted compare tensile strength toughness healed samples...
An ion pair receptor is reported that capable of extracting LiCl and LiBr selectively from aqueous phases; the extraction efficiency enhanced by presence other competitive salts.
The ongoing COVID-19 pandemic has increased the use of single-use medical fabrics such as surgical masks, respirators, and other personal protective equipment (PPE), which have faced worldwide supply chain shortages. Reusable PPE is desirable in light shortages; however, reusable largely restricted by difficulty rapid sterilization. In this work, we demonstrate successful bacterial viral inactivation through remote radio frequency (RF) heating conductive textiles. RF behavior polymer-coated...
Abstract LiCl is a classic “hard” ion salt that present in lithium‐rich brines and key component end‐of‐life materials (that is, used lithium‐ion batteries). Its isolation purification from like salts recognized challenge with potential strategic economic implications. Herein, we describe two ditopic calix[4]pyrrole‐based ion‐pair receptors ( 2 3 ), are capable of selectively capturing LiCl. Under solid–liquid extraction conditions, using as the extractant, could be separated NaCl/KCl...