A5104019669- Advanced Sensor and Energy Harvesting Materials
- Surface Modification and Superhydrophobicity
- Innovative Microfluidic and Catalytic Techniques Innovation
- Electrospun Nanofibers in Biomedical Applications
- Polydiacetylene-based materials and applications
- Polymer Surface Interaction Studies
- Nanomaterials and Printing Technologies
- Electrohydrodynamics and Fluid Dynamics
- Organic Electronics and Photovoltaics
- Copper-based nanomaterials and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Cultural and Historical Studies
- Advanced Data Storage Technologies
- Aerosol Filtration and Electrostatic Precipitation
- Pickering emulsions and particle stabilization
- Advanced Materials and Mechanics
- Polymer composites and self-healing
- Catalysis and Hydrodesulfurization Studies
- Pharmacological Effects of Natural Compounds
- Healthcare and Venom Research
- Electric Motor Design and Analysis
- Photonic and Optical Devices
- Adhesion, Friction, and Surface Interactions
- Icing and De-icing Technologies
- Catalysis and Oxidation Reactions
Pohang University of Science and Technology
2006-2024
Hanyang University
2023
Abstract Transparent substrates are widely used for optical applications from lenses personal and sports eyewear to transparent displays sensors. While these require excellent properties, they often suffer a variety of environmental challenges such as excessive fogging surface contamination. In this work, it is demonstrated that wet‐style superhydrophobic coating, which simultaneously exhibits antifogging, antireflective, self‐cleaning can be prepared by pattern transferring...
Humidity-sensitive structural color has emerged as a promising technology due to its numerous advantages that include fast response, intuitiveness, stand-alone capability, non-toxicity, well resistance thermal and chemical stresses. Despite immense technological advancements, these colors lack the ability present independent multiple images through transformation. Herein, we an approach address this constraint by introducing chemically geometrically programmable photoreactive polymer which...
Despite the recent development in various materials capable of encapsulating biomolecules, there exist limited reports on multicomponent encapsulation biocompatible microcapsules. In this letter, we utilize molecular weight dependent solubility poly(ethylene glycol) diacrylate (PEGDA) and droplet microfluidics to achieve direct both hydrophilic hydrophobic cargoes PEG By using PEGDA 250 as middle phase, demonstrate that these PEGDA-based microcapsules allow simultaneous cargoes. We further...
In the last few decades, numerous studies have focused on designing suitable hydrophilic materials to inhibit surface-induced fog or frost under extreme conditions. As fogging and condensation frosting a film involves molecular interaction with water prior forming discrete droplets surface, it is essential control extent of strongly bind molecules for antifogging coatings. While contact angle measurement commonly used probe hydrophilicity film, oftentimes fails predict antifrosting...
Polymer dielectric materials with hydroxyl functionalities such as poly(4-vinylphenol) and poly(vinyl alcohol) have been utilized widely in organic thin-film transistors (OTFTs) because of their excellent insulating performance gained by hydroxyl-mediated cross-linking. However, the polar functionality also deleteriously affects OTFTs significantly impairs device stability. In this study, a sub-20 nm, high-k copolymer functionality, poly(2-hydroxyethyl acrylate-co-di(ethylene glycol) divinyl...
We present a microfluidic approach that utilizes temperature-responsive and biocompatible palm oil as the shell material in microcapsules to simultaneously achieve hermetic sealing well on-demand temperature-triggered release of encapsulated actives. Unlike common paraffin waxes (e.g., eicosane), microcapsule shells comprising do not form pores or cracks during freezing provide seal, nearly perfect seal separates core containing actives from surrounding environment over prolonged period...
A conformal antifogging polymer thin film with high stretchability was synthesized in a one-step manner using vapor phase method.
One‐step microfluidic approach in which interfacial complexation of hydrogen bonding polymers is utilized to prepare pH‐responsive microcapsules presented. Using water‐in‐oil‐in‐oil‐in‐water (W 1 /O 2 /W ) triple‐emulsion droplets as templates, it shown that polymeric with an aqueous core and a shell consists two complementary polymers, poly(propylene oxide)(PPO) poly(methacrylic acid)(PMAA), can be prepared robust manner. The presence buffer layer enables controlled PMAA PPO at the...
We present a durable superhydrophobic poly(vinylidene fluoride) (PVDF)-based nanofibrous membrane to achieve high-performance air filters with reusability. demonstrate that the additional assembly of silica nanoparticles on an electrospun PVDF and subsequent low-surface-energy treatment enables nonwetting various probing liquids exhibit low roll-off angle (∼15°) even for 1 μL water artificial saliva droplets. This allows fine dust particles adsorbed modified be easily removed by washing...
In article number 2002710, Dong-Pyo Kim, Hyomin Lee, and co-workers report a wet-style superhydrophobic coating that exhibits excellent optical properties under variety of environmental challenges. This for sensors is prepared by pattern transferring low-surface-energy microstructures onto polymer–silica nanocomposite. The nanocomposite guides water molecules to preferably condense into suppress reflection, while the microstructure enables exhibit self-cleaning properties.
Abstract In the rapidly evolving landscape of information security, demand for optical encryption techniques based on wettability patterning, which allows decryption without sophisticated devices and complex procedures, is progressively increasing. However, conventional approaches binary patterned surfaces impose significant constraints in their practical use high‐level security. Herein, a novel approach to optically encrypt through multi‐level patterning introduced porous polymer matrix...
Effects of 200 °C annealing and 85 °C/85% relative humidity (R.H.) temperature/humidity environments on the electrical resistivity interfacial adhesion energy between screen-printed Ag film polyimide substrate were systematically investigated. Measured peel strength was 22.2 gf/mm before environmental treatment, then decreased to 0.1 0.5 for treatment during 500 hours, respectively. Cu oxide formation at Cu/Ag interface degradation itself seem be responsible decrease treatments, Screen...
We report hole-like whispering gallery semiconductor lasers from naturally formed gain-guide-assisted photonic quantum rings, with thresholds potentially reducible to micro-to-nano ampere regimes. Photonic crystal-like holes lead practical high-density electro-pumped hole emitter arrays.