A5058539431- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Electrospun Nanofibers in Biomedical Applications
- Silk-based biomaterials and applications
- Conducting polymers and applications
- Carbon Nanotubes in Composites
- biodegradable polymer synthesis and properties
- Advanced Sensor and Energy Harvesting Materials
- Graphene research and applications
- Advanced battery technologies research
- Advanced Cellulose Research Studies
- Polymer Nanocomposites and Properties
- Advanced Battery Technologies Research
- Microplastics and Plastic Pollution
- Vibration Control and Rheological Fluids
- Graphene and Nanomaterials Applications
- Bone Tissue Engineering Materials
- Nanocomposite Films for Food Packaging
- Dielectric materials and actuators
- Surface Modification and Superhydrophobicity
- Fiber-reinforced polymer composites
- Electrocatalysts for Energy Conversion
- Polymer crystallization and properties
- Nanotechnology research and applications
Inha University
2016-2025
Nanjing Tech University
2025
Government of the Republic of Korea
2019
Incheon Medical Center
2014-2018
Seoul National University
2014-2015
Changwon National University
2008
Yanbian University
2008
Tufts University
2002-2006
Yonsei University
2006
Massachusetts Institute of Technology
2002-2004
Three fabrication techniques, freeze-drying, salt leaching and gas foaming, were used to form porous three-dimensional silk biomaterial matrixes. Matrixes characterized for morphological functional properties related processing method conditions. The porosity of the leached scaffolds varied between 84 98% with a compressive strength up 175 ± 3 KPa, foamed had porosities 87−97% 280 4 KPa. freeze-dried prepared at different freezing temperatures (−80 −20 °C) subsequently treated concentrations...
Control of silk fibroin concentration in aqueous solutions via osmotic stress was studied to assess relationships gel formation and structural, morphological, functional (mechanical) changes associated with this process. Environmental factors potentially important the vivo processing were also determine their contributions Gelation affected by temperature, Ca2+, pH, poly(ethylene oxide) (PEO). time decreased increase protein concentration, decrease addition PEO. No change gelation observed...
Electrospinning for the formation of nanoscale diameter fibers has been explored high-performance filters and biomaterial scaffolds vascular grafts or wound dressings. Fibers with diameters provide benefits due to high surface area. In present study we explore electrospinning protein-based biomaterials fabricate membranes from regenerated silkworm silk, Bombyx mori, solutions. To improve processability protein solution, poly(ethylene oxide) (PEO) molecular weight 900 000 was blended silk...
Silk fibers have outstanding mechanical properties. These are insoluble in organic solvents and water, biocompatible, exhibit slow biodegradation vitro vivo due to the hydrophobic nature of protein presence a high content β-sheet structure. Regenerated silk fibroin can be processed into variety materials normally stabilized by induction formation through use or physical stretching. To extend biomaterial utility proteins, options form water-stable silk-based with reduced would desirable....
Novel carbon-based microporous nanoplates containing numerous heteroatoms (H-CMNs) are fabricated from regenerated silk fibroin by the carbonization and activation of KOH. The H-CMNs exhibit superior electrochemical performance, displaying a specific capacitance 264 F/g in aqueous electrolytes, energy 133 Wh/kg, power 217 kW/kg, stable cycle life over 10000 cycles. As service to our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed...
The nanostructure design of porous carbon-based electrode materials is key to improving the electrochemical performance supercapacitors. In this study, hierarchically carbon nanosheets (HP-CNSs) were fabricated using waste coffee grounds by in situ carbonization and activation processes KOH. Despite simple synthesis process, HP-CNSs had a high aspect ratio (∼20 nm thickness several micrometers lateral size), specific surface area 1945.7 m2 g–1, numerous heteroatoms, good electrical transport...
Abstract Silk proteins are of great interest to the scientific community owing their unique mechanical properties and interesting biological functionality. In addition, silk not burned out following heating, rather they transformed into a carbonaceous solid, pyroprotein; several studies have identified potential carbon precursors for state-of-the-art technologies. However, no mechanism carbonization has yet been reported. Here we examine structural chemical changes systematically at...
Abstract The galvanostatic lithiation/sodiation voltage profiles of hard carbon anodes are simple, with a sloping drop followed by plateau. However, precise understanding the corresponding redox sites and storage mechanisms is still elusive, which hinders further development in commercial applications. Here, comprehensive comparison lithium‐ sodium‐ion behaviors conducted, yielding following key findings: 1) section presented lithium‐ion intercalation graphitic lattices carbons, whereas it...
A systematic investigation established a significant correlation between the 2D to G band intensity ratio ( I / ) in Raman spectrum and internal kinetic barrier for sodium-ion transfer, achieving highest sodium plateau capacity of ∼400 mA h g −1 (A30 sample).
The morphology and microstructure of electrospun B. mori silk/poly(ethylene oxide) (PEO) fibers with diameters less than 1 μm were characterized using birefringence, wide-angle X-ray diffraction, differential scanning calorimetry, atomic force microscopy (AFM). In the as-spun fibers, silk fibroin is present in a coil conformation due to rapid fiber formation during electrospinning. After treatment methanol, was transformed into β-sheet-containing structure. Evidence for nanofibrils within...
Phase separation into controllable patterned microstructures was observed for Bombyx mori silkworm silk and poly(ethylene oxide) (PEO) (900000 g/mol) blends cast from solution. The evolution of the with increasing PEO volume fraction is strikingly similar to progression phases surfactants. chemically materials obtained provide engineerable biomaterial surfaces predictable microscale features which can be used create topographically or functionalized biomaterials. Solution blending...
Poly(methyl methacrylate) (PMMA) nanocomposites containing well-dispersed multiwalled carbon nanotubes (MWNTs) were prepared via an in-situ bulk polymerization of methyl methacrylate (MMA) in the presence (CNTs). Electrical conductivities synthesized PMMA/MWNT nanocomposite films 1−5 wt % MWNT between 10-4 and 10-2 S/cm. When with same concentrations electrospun DMF into nanofibrous membrane, reduced to ∼10-10 S/cm, even though dispersion MWNTs nanofibers was superior conventional polymer...
Electrically conducting polymeric membranes were prepared by incorporating multiwalled carbon nanotubes (MWCNTs) into bacterial cellulose pellicles produced Gluconacetobacter xylinum. The MWCNTs dispersed in a surfactant (cationic cetyl trimethylammonium bromide) solution, and dipped the solution for 6, 12, 24 h. surfactants then extracted pure water dried. Electron microscopy showed that individual strongly adhered to surface inside of pellicle. conductivity MWCNTs-incorporated pellicle, as...
Pyroprotein-based carbon nanoplates are fabricated from self-assembled silk proteins as a versatile platform to examine sodium-ion storage characteristics in various environments. It is found that, depending on the local structure, sodium ions stored via chemi-/physisorption, insertion, or nanoclustering of metallic sodium. As service our authors and readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for online...