A5073333270- Graphene research and applications
- Carbon Nanotubes in Composites
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Graphene and Nanomaterials Applications
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Polymer composites and self-healing
- Thin-Film Transistor Technologies
- Advanced Battery Materials and Technologies
- Nanotechnology research and applications
- Nanopore and Nanochannel Transport Studies
- Catalysis and Oxidation Reactions
- Analytical Chemistry and Sensors
- Photopolymerization techniques and applications
- Silicon and Solar Cell Technologies
- Nanomaterials for catalytic reactions
- Organic Light-Emitting Diodes Research
- Additive Manufacturing and 3D Printing Technologies
- Ion-surface interactions and analysis
- Advanced Chemical Sensor Technologies
- Fusion materials and technologies
- Chemical Thermodynamics and Molecular Structure
LG Chem (South Korea)
2022-2024
Seoul National University
1995-2017
National University
2013
Highly porous carbon has played an important role in tackling down the energy and environmental problems due to their attractive features such as high specific surface area (SSA), stability, mass productivity. Especially, desirable characteristics of highly lightweight, fast adsorption/desorption kinetics, SSA have attracted extensive attention "hydrogen storage" application which is a main bottleneck for realization on-board hydrogen fuel cell vehicles. We herein presented with hierarchical...
Hummers method has been used for 50 years to prepare graphene oxide (GO) by oxidizing graphite using Mn2O7. In this work, a new angle on is described. The oxidation procedure before the addition of water, which respected as main step method, named I oxidation, and widely ignored further after water II oxidation. chemical structural evolutions during was demonstrated first time various techniques including atomic force microscopy (AFM), dynamic light scattering (DLS), X-ray photoelectron...
A controlled assembly and alignment of carbon nanotubes (CNTs) in a high-packing density with scalable way remains challenging. This paper focuses on the preparation self-assembled well-aligned CNTs densely packed nanostructure form buckypaper via simple filtration method. The CNT suspension concentration is strongly reflected behavior buckypaper. We further demonstrated that horizontally aligned domain gradually increases size when increasing deposited quantity. resultant exhibited notably...
The self-assembled nanostructures of carbon nanomaterials possess a damage-tolerable architecture crucial for the inherent mechanical properties at both micro- and macroscopic levels. Bone, or "natural composite," has been known to have superior energy dissipation fracture resistance abilities due its unique load-bearing hybrid structure. However, few approaches emulated desirable structure using nanomaterials. In this paper, we present an approach in fabricating composite paper based on...
Reduced graphene oxide-based films were prepared to assess their effects as gas barriers on the stability of organic photovoltaic (OPV) devices. The direct spin-casting a oxide suspension onto an aluminum electrode was performed encapsulate associated OPV device with reduced film. lifetime after reduction process found be increased by factor 50. barrier properties layer are closely related its surface roughness and dispersibility. Furthermore, these can enhanced controlling thermal...
We prepared liquid phase exfoliated edge-selectively oxidized graphene (LPEOG) with a high concentration in water (∼14.7 mg ml-1) and ratio of single layer (70%). The edge graphite was selectively by step II oxidation the modified Hummers method, we subsequently (EOG) into LPEOG. selective LPEOG confirmed X-ray photoelectron spectroscopy (XPS), diffraction (XRD), zeta-potentiometry, Raman spectroscopy, Fourier-transform infrared (FT-IR), atomic force microscopy (AFM), transmission electron...
Graphene oxide (GO) was recently reported to assemble into one-dimensional fiber precursors that can be used produce next-generation multifunctional graphene-based materials. This study describes the facile fabrication of GO fibers with excellent mechanical properties, utilizing a diamine cross-linker forms ion bridges between layers. Organic co-coagulants and postdrawing processes, which are usually employed in typical spinning were not here. The layers readily aligned along axis, formed...
Graphene oxide (GO) has been synthesized by the Hummers method with modification of experimental condition different research groups, but there is no guideline to prepare tailored GO for targeted applications. In this research, we suggest a tailor-fittable functionalization graphene on basis scope our previous report two-step oxidation GO. We describe detailed procedure synthesis GO, effects degree step I characteristics and comparing them II oxidation. Characteristic changes occurring...
The Hansen solubility parameters (HSPs) of as-produced multi-walled carbon nanotubes (APMWCNTs) were determined by means the inverse gas chromatography (IGC) technique. Due to non-homogeneous surfaces APMWCNTs arising from defects and impurities, it was necessary establish adequate working conditions for determining HSPs CNTs. We then obtained compared these results with earlier reports as using sedimentation molecular dynamics simulation methods. It found that determination CNTs IGC can...
Carbon nanotube (CNT) dispersions have been prepared using a variety of surface modification methods; however, these methods frequently negative effect on the intrinsic properties CNTs or need to remove modifiers. The Flory-Huggins theory suggests that such problems can be alleviated eliminated, if ideally, when solubility parameters and given medium are very similar equal each other. Since earlier reported were determined by indirect varied in wide ranges, we suggested herein possible way...
In this work, we examined the reasons underlying humidity-induced morphological changes of electrospun fibers and suggest a method controlling fiber morphology under high humidity conditions. We fabricated OPV devices composed fibers, performance depends significantly on morphology. The evaporation rate solvent at various relative was measured to investigate effects during electrospinning process. beaded nanofiber originated due slow To increase conditions, warm air applied system. beads...
A facile purification method for oxidized carbon nanotubes (CNTs) is developed to preserve acidic compounds (ACCs) achieving high-quality dispersion of CNTs. The remaining ACCs, which originated from the surface destruction CNTs during oxidation process, are considered play a crucial role in water and various polar protic solvents. To elucidate concrete direct titration applied quantitatively investigate degree ionization both ACCs their aqueous dispersions. While with strong carboxylic...
Low-melting-point metals, known as liquid metals (LMs), have recently attracted significant interest owing to their high conductivity and fluidity. "Emulsification" of LMs into colloidal microdroplets in immiscible carrier fluids confers a variety unique opportunities terms processability well functionality; however, achieving emulsification at LM loads while significantly modifying the rheology resulting emulsions presents considerable challenge. Furthermore, formation surface oxide skin on...
In this study, a simple method for preparing direct-writable and thermally one-step curable epoxy composite inks was proposed. Specifically, colloidal containing mixture of ordinary resin anhydride-type hardener with the suspended alumina microplates, as exemplary fillers, are "stained" small amounts water. This increases elasticity ink via interparticle capillary attraction promotes curing matrix in low-temperature ranges, causing three-dimensional (3D) printed to avoid structural...