A5037387745- Photopolymerization techniques and applications
- Pain Mechanisms and Treatments
- Bone fractures and treatments
- Veterinary Orthopedics and Neurology
- Orthopedic Surgery and Rehabilitation
- Advanced Polymer Synthesis and Characterization
- Structural Load-Bearing Analysis
- Advanced Photocatalysis Techniques
- Radical Photochemical Reactions
- Elbow and Forearm Trauma Treatment
- Sulfur-Based Synthesis Techniques
- Spine and Intervertebral Disc Pathology
- Pharmacological Effects of Natural Compounds
- Pharmacological Receptor Mechanisms and Effects
- Veterinary Oncology Research
- Composite Structure Analysis and Optimization
- Neuropeptides and Animal Physiology
- Intraocular Surgery and Lenses
- Structural Engineering and Vibration Analysis
- Organic Light-Emitting Diodes Research
- Photonic and Optical Devices
- Healthcare and Venom Research
- Bee Products Chemical Analysis
- Vibration and Dynamic Analysis
- Advanced Fiber Laser Technologies
Seoul National University
2002-2025
Materials Science & Engineering
2024
Karlsruhe Institute of Technology
2023
Jeonbuk National University
2008-2022
Ulsan National Institute of Science and Technology
2018-2022
Government of the Republic of Korea
2020
The University of Texas at Arlington
2016-2017
Yeungnam University
2006
Research Institute of Industrial Science and Technology
2006
Inha University
1994
Cyanoarene-based photocatalysts (PCs) have attracted significant interest owing to their superior catalytic performance for radical anion mediated photoredox catalysis. However, the factors affecting formation and degradation of cyanoarene-based PC (PC•‒) are still insufficiently understood. Herein, we therefore investigate PC•‒ under widely-used photoredox-mediated reaction conditions. By screening various PCs, elucidate strategies efficiently generate with adequate excited-state reduction...
Current technological advances in the organic light-emitting diode panel design of foldable smartphones demand advanced adhesives with UV-blocking abilities, beyond their conventional roles bonding objects and relieving deformation stress. However, optically clear (OCAs) ability cannot be prepared using UV-curing methods relying on a photoinitiator. Herein, new acrylic resin that can efficiently cured visible light without oxygen removal is presented, which may used to develop OCAs for use...
Since the pioneering discovery of a protein bound to poly(ethylene glycol), utility protein-polymer conjugates (PPCs) is rapidly expanding currently emerging applications. Photoinduced energy/electron-transfer reversible addition-fragmentation chain-transfer (PET-RAFT) polymerization very promising method prepare structurally well-defined PPCs, as it eliminates high-cost and time-consuming deoxygenation processes due its oxygen tolerance. However, oxygen-tolerance behavior PET-RAFT not...
Abstract In developing an organic light-emitting diode (OLED) panel for a foldable smartphone (specifically, color filter on encapsulation) aimed at reducing power consumption, the use of new optically clear adhesive (OCA) that blocks UV light was crucial. However, incorporation UV-blocking agent within OCA presented challenge, as it restricted traditional UV-curing methods commonly used in manufacturing process. Although visible-light curing technique producing proposed, its slow speed...
Abstract Atom transfer radical polymerization (ATRP) with dual photoredox/copper catalysis combines the advantages of photo-ATRP and photoredox-mediated ATRP, utilizing visible light ensuring broad monomer scope solvent compatibility while minimizing side reactions. Despite its popularity, challenges include high photocatalyst (PC) loadings (10 to 1000 ppm), requiring additional purification increasing costs. In this study, we discover a PC that functions at sub-ppm level for ATRP through...
In this work, we highlight the impact of reaction conditions ( i.e. monomer conversion, time, and light intensity) on stability thiocarbonylthio group-containing polymers by quantification utilizing TG-HPLC.
The utility of the Cassie-Baxter formula to predict apparent contact angle a drop on rough hydrophobic surfaces has been questioned recently. To resolve this issue, experimental and numerical data for advancing receding angles are reported. In all cases considered it is seen that follow overall trend formula, except front pillar type roughness. It shown deviations from have one-to-one correlation with microscopic distortions line respect its configuration in state.
Solvent-free acrylic pressure-sensitive adhesives were prepared<italic>via</italic>visible-light driven photocatalytic free radical polymerization. Combined experiments and quantum calculations divulged the origin of enhanced rate polymerisation in presence of<italic>N</italic>-vinyl monomers.
Owing to their excellent properties, such as transparency, resistance oxidation, and high adhesivity, acrylic pressure-sensitive adhesives (PSAs) are widely used. Recently, solvent-free PSAs, which typically prepared via photopolymerization, have attracted increasing attention because of the current strict environmental regulations. UV light is commonly used an excitation source for whereas visible light, safer humans, rarely utilized. In this study, we PSAs light-driven photoredox-mediated...
Owing to current global environmental concerns, polymers must be prepared under eco-friendly reaction conditions based on sustainable chemistry. In this context, highly efficient photoinduced energy/electron transfer reversible addition–fragmentation chain-transfer (PET-RAFT) polymerization ambient/aqueous without additives and/or with the aid of sunlight is optimal approach for producing well-defined structures. This can accomplished a photocatalyst (PC) that utilizes full spectrum maximum...
Abstract Cutaneous electrical or chemical stimulation can produce an anti‐inflammatory effect, which is dependent on adrenal medullary‐sympathetic activation. We have previously shown that peripheral injection of bee venom (BV) also produces a significant effect neurally mediated. In the present study, we examined whether this gland using mouse inflammatory air pouch model. Subcutaneous (s.c.) BV produced marked suppression leucocyte migration and tumour necrosis factor (TNF)‐ α...
A series of connection tests which were composed closed cold-formed steel sections conducted to investigate the performance connections constituting a pitched roof portal frame. The flexural strength section was investigated first and structural behavior including moment-rotation relation, yield, ultimate moment capacity studied experimentally. test specimens consisted column base, eave, apex main factors thickness shape mild element. Finally, frame tested under both constant vertical...
We present the strategic design of donor-acceptor cyanoarene-based photocatalysts (PCs) aiming to augment beneficial PC degradation for halogen atom transfer (XAT)-induced dehalogenation reactions. Our investigation reveals a competitive nature between catalytic cycle and pathway, with becoming dominant, particularly less activated alkyl halides. The behavior PCs significantly impacts efficiency XAT process, leading exploration into manipulating in desirable direction. Recognizing variation...
Epoxy-based elastomers with remarkable flexibility have garnered attention due to their versatility in various applications, including sensors, smart fabrics, nanocomposites, and thermally conductive composite materials. In these studies, the selection of an appropriate hardener is crucial imparting elastomeric properties epoxy. Among available hardeners, thiol-based hardeners present notable advantages. First, they facilitate rapid curing at low temperatures via epoxy–thiol click reaction....
With the increasing adoption of smart factories in manufacturing sites, a large amount raw data is being generated from manufacturers’ sensors and Internet Things devices. In environment, collection reliable has become an important issue. When utilizing collected or establishing production plans based on user-defined data, actual performance may differ established plan. This particularly so when there are modifications physical line, such as manual processes, newly developed addition new...
Akabane virus (AKAV), an arthropod-transmitted bunyavirus, is a major cause of congenital abnormalities and encephalomyelitis in ruminants. In 2010, there was outbreak Korea fifteen AKAV strains, including AKAV-7, were isolated from cows. To identify the neuropathogenicity we performed experimental infection Six-month-old female Korean Holstein dairy cattle inoculated with AKAV-7 by various routes, intracerebral (IC), intrasubarachnoid space (IS), subcutaneous (SC) intravenous (IV); separate...
This case report describes the application of three-dimensional (3D) technologies for surgical treatment portosystemic shunt (PSS) with segmental caudal vena cava (CVC) aplasia. Two client-owned dogs were diagnosed PSS along CVC aplasia using computed tomography. Through 3D volume and surface rendering, vascular anatomic anomaly each patient was identified in detail. A patient-specific model used preoperative planning. According to plan established based on rendered image printed model,...
Thermally activated delayed fluorescence (TADF) emitters are molecules of interest as homogeneous organic photocatalysts (OPCs) for photoredox chemistry. Here, three classes OPC candidates studied in dichloromethane (DCM) or N,N-dimethylformamide (DMF) solutions, using transient absorption spectroscopy and time-resolved spectroscopy. These OPCs benzophenones with either carbazole (2Cz-BP 2tCz-BP) phenoxazine/phenothiazine (2PXZ-BP 2PTZ-BP) appended groups the dicyanobenzene derivative...
We experimentally demonstrate selective up-conversion of either TM00 or TM01 mode a 1540 nm single-photon signal into at 775 with >70% efficiency, better than −10 dB crosstalk, and >102 signal-to-noise-photon ratio.
Using a PPLN waveguide, we selectively up-convert either TM00 or TM01 mode, any of their superpositions from 1540 nm into mode at 775 nm, with >70% internal efficiency and better than –16-dB crosstalk.
Controlling adhesive and cohesive properties in a refined manner is paramount to developing high-performance adhesives. Therefore, implementing cross-linkers have become major focus research, but most conventional are small molecules or oligomers with limited functionality. Herein, brush copolymer consisting of varying lengths densities the aziridine-capped poly(ethylene glycol) (AzPEG) brush, termed P(AzPEG), presented for use as multifunctional polymeric cross-linker carboxylate-containing...