A5074414344- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Iron oxide chemistry and applications
- Copper-based nanomaterials and applications
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Gold and Silver Nanoparticles Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Conducting polymers and applications
- Mesoporous Materials and Catalysis
- Nanoporous metals and alloys
- ZnO doping and properties
- Silk-based biomaterials and applications
- Nanocluster Synthesis and Applications
- Mine drainage and remediation techniques
- Photonic Crystals and Applications
- Periodontal Regeneration and Treatments
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- Bone Tissue Engineering Materials
- Advanced Nanomaterials in Catalysis
- Gas Sensing Nanomaterials and Sensors
- Anodic Oxide Films and Nanostructures
- Electrocatalysts for Energy Conversion
- Carbon and Quantum Dots Applications
Korea Basic Science Institute
2016-2025
Government of the Republic of Korea
2018-2021
Yonsei University
2000-2010
University of New Orleans
2010
Gangneung–Wonju National University
2010
University of Illinois Urbana-Champaign
2001-2009
Kangnam University
2005
Pohang University of Science and Technology
2005
Seoul National University
2004
A self-calibrating bipartite viscosity sensor 1 for cellular mitochondria, composed of coumarin and boron-dipyrromethene (BODIPY) with a rigid phenyl spacer mitochondria-targeting unit, was synthesized. The showed direct linear relationship between the fluorescence intensity ratio BODIPY to or lifetime media viscosity, which allowed us determine average mitochondrial in living HeLa cells as ca. 62 cP (cp). Upon treatment an ionophore, monensin, nystatin, observed increase 110 cP.
A new phosphorescent zinc sensor (ZIrF) was constructed, based on an Ir(III) complex bearing two 2-(2,4-difluorophenyl)pyridine (dfppy) cyclometalating ligands and a neutral 1,10-phenanthroline (phen) ligand. zinc-specific di(2-picolyl)amine (DPA) receptor introduced at the 4-position of phen ligand via methylene linker. The cationic exhibited dual phosphorescence bands in CH(3)CN solutions originating from blue yellow emission dfppy ligands, respectively. Zinc coordination selectively...
Polymeric organic photovoltaic (OPV) cells are promising candidates for low-cost, high-performance energy sources due to their low material and processing costs, flexibility, ease of manufacturing by solution processes. However, power-conversion efficiency (PCE) has impeded the development OPV cells. The PCE in solar been attributed carrier mobility, which is related transport length charge carriers within active layers. Graphene can be an ideal assisting layer its excellent charger thermal...
Despite the promising photofunctionalities, phosphorescent probes have been examined only to a limited extent, and molecular features that provide convenient handles for controlling phosphorescence response yet be identified. We synthesized series of zinc sensors based on cyclometalated heteroleptic Ir(III) complex. The sensor construct includes two anionic cyclometalating ligands neutral diimine ligand tethers di(2-picolyl)amine (DPA) receptor. A with range electron densities band gap...
We herein report a fluorescent bimodal probe (1) capable of determining ER viscosity and polarity changes using FLIM fluorescence ratiometry, respectively; during stress caused by tunicamycin, the was increased from ca. 129.5 to 182.0 cP (dielectric constant, ε) enhanced 18.5 21.1.
Abstract Oxygen vacancies (OVs) are a mixed blessing for the photoelectrochemical (PEC) water oxidation performance of monoclinic tungsten trioxide (m‐WO 3 ) photoanodes. Although it is widely accepted that moderate concentration OVs beneficial PEC m‐WO photoanodes, this argument assumes uniform distribution throughout crystal. In case, only overall needs to be considered. However, spatial non‐uniformity OV defects in photoanodes has not been thoroughly examined. study, by employing nanorod...
Herein, in order to improve the conductivity and slack water oxidation kinetics of hematite (α-Fe2O3) photoanode, we propose Nb-doped Co(OH)x cocatalyst-deposited α-Fe2O3 thin film photoanode (Nb-HT/Co(OH)x) via situ diluted hydrothermal microwave-assisted methods. The as-prepared Nb-HT/Co(OH)x thin-film exhibited a photocurrent density 1.78 mA cm–2 at 1.23 V versus reversible hydrogen electrode (RHE), which is 1.7-fold higher than that Bare-Fe2O3 photoanode. dual effect Nb-doping deposition...
Ru–FeOOH and FeNi(OH) x dual-layer cocatalysts passivated the recombination surface states, resulting in Fermi level de-pinning effect, while tailoring intermediate states for effective hole transfer to electrolyte.
We examine the effects of chlorine-passivation Cd surface atoms on photocatalytic H2O reduction by CdSe NCs. Transient absorption spectroscopy reveals that Cl passivation removes electron trap states in NCs, which is also reflected an increase photoluminescence quantum yield, e.g., from 9 to 22% after treatment. Size-tunable energy NCs enable systematic investigation defects and their effect hydrogen generation rate. It turns out that, depending band-edge levels, may enhance or inhibit...
Gold-decorated block copolymer microspheres (BCP-microspheres) displaying various surface morphologies were prepared by the infiltration of Au precursors into polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) microspheres. The fabricated emulsifying PS-b-P4VP polymers in chloroform a surfactant solution water, followed evaporation chloroform. selective swelling P4VP domains precursor under acidic conditions resulted formation Au-decorated BCP-microspheres with nanostructures. As evidenced...
The aim of this study was to evaluate the in vivo bone regeneration capability alginate (AL), AL/hydroxyapatite (HA), and AL/HA/silk fibroin (SF) composites. Forty Sprague Dawley rats were used for animal experiments. Central calvarial (diameter: 8.0 mm) defects grafted with AL, AL/HA, or AL/HA/SF. New formation evaluated by histomorphometric analysis. To demonstrate immunocompatibility each group, level tumor necrosis factor (TNF)-α expression studied immunohistochemistry (IHC) quantitative...
A highly crystalline conjugated donor (D)-acceptor (A) block copolymer (PBDT2T-b-N2200) that has good solubility in nonhalogenated solvents is successfully synthesized. PBDT2T-b-N2200 shows a broad complementary absorption behavior owing to wide-band gap (PBDT2T) present as D-block and narrow-band acceptor (N2200) an A-block. Polymer solar cells (PSCs) with (CBCP) are fabricated using toluene solution PSC created annealed film showing the highest power conversion efficiency of 6.43%, which...
Amorphous Zn2SnO4 (am-ZTO) films with extreme surface uniformity, high electron mobility, and fewer charge traps were successfully developed by controlling the concentrations of 2-methoxyethanol solutions containing 2:1 stoichiometric ratio Zn to Sn. For first time, we demonstrate that solution-processed am-ZTO thin are highly efficient as an electron-selective layer (ESL) for mixed perovskite solar cells (PSCs). When ESLs combined bandgap-tuned FAMAPbI3 perovskites, a champion efficiency...
Indium phosphide (InP)-based quantum dots (QDs) are widely studied as environmentally friendly light emitters for display applications. However, the synthesis of InP QDs with optical properties that meet high color quality comparable cadmium (Cd)- and lead (Pb)-based is challenging. In this article, we present surface-modified bright green luminescence core–shell (CS-QDs) narrowest full width at half-maximum (fwhm) 33 nm, absolute yield (QY) 71%, an absorption spectra valley/depth (V/D)...
Herein, first, we synthesize a multifunctional photocatalyst via metal oxides loaded (Co/Pd) on acid-treated TiO2 nanorods (ATO) and further introduce hydrogen annealing treatment. The treatment introduces converted into bimetallic form delays the photogenerated charge recombination process. Also, oxygen vacancies are formed due to partial reduction of Ti4+ Ti3+ sites. In addition, help improve photocatalytic degradation antibacterial activity. hydrogen-treated (Pd(1)Co(1)/ATO (red))...
Multicolor emitting microspheres with three dimensionally controlled nanostructures are produced via a simple and efficient method. Location control separation of the quantum dots (QDs) within achieved by supramolecular assembly block copolymer micelles to Förster resonance energy transfer efficiency between different-colored QDs. As service our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may be re-organized for online...
Activation of hematite by low-temperature hydrogen reduction induced highly Sn<sup>4+</sup> diffusion.
Abstract Silk suture material is primarily composed of silk fibroin and regarded as a non-resorbable material. It slowly degraded by proteolysis when it implanted into the body. 4-Hexylresorcinol (4HR) well-known antiseptic. In this study, biodegradability 4HR-incorporated sutures were compared to that untreated polyglactin 910 sutures, commercially available resorbable suture. exhibited anti-microbial properties. Matrix metalloproteinase (MMP) can digest wide spectrum proteins. 4HR...
Patterned WO<sub>3</sub> microdisc arrays exhibit excellent photoelectrochemical performances, owing to enhanced light absorption and effective charge separation.