A5045551283- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Carbon and Quantum Dots Applications
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- Electrocatalysts for Energy Conversion
- Luminescence and Fluorescent Materials
- Semiconductor materials and devices
- Supercapacitor Materials and Fabrication
- TiO2 Photocatalysis and Solar Cells
- Luminescence Properties of Advanced Materials
- Analytical Chemistry and Sensors
- Diamond and Carbon-based Materials Research
- Ionic liquids properties and applications
- Perovskite Materials and Applications
- Electrochemical sensors and biosensors
- Catalytic Processes in Materials Science
- Natural product bioactivities and synthesis
- Graphene and Nanomaterials Applications
- Essential Oils and Antimicrobial Activity
- Organic Light-Emitting Diodes Research
- Lignin and Wood Chemistry
- CO2 Reduction Techniques and Catalysts
Korea Research Institute of Bioscience and Biotechnology
2015-2024
University of Kentucky
2014-2023
Sam Houston State University
2018-2023
Yong In University
2018
Hanyang University
2015
Natural (Czechia)
2015
Sungkyunkwan University
2015
Dong-A University
2013-2014
Michigan State University
2009-2013
Samsung (South Korea)
2007-2013
Fluorescent carbon nanodots (CNDs) were synthesized in oxidized and reduced forms analyzed at the single-particle level. Images of single CNDs different excitation energies revealed significant heterogeneity lower energy trap sites between particles. We observed that a high percentage CND particles transitioned multiple fluorescence intensity levels indicative multichromophoric systems. Despite this behavior, individual exhibit single-step photobleaching transient blinking to background...
Larger dopants with high electron affinities are found to yield increased electrical conductivities and power factors at lower doping concentrations.
This paper is focused on how the spectroscopic properties of conjugated polymers evolve in size range between single polymer chains and bulk material. The measurements used single-particle spectroscopy techniques include both static dynamic measurements. main observation this work that MEH-PPV rapidly as a function nanoparticle achieve bulk-like for nanoparticles greater than 10 nm size. Nanoparticles were assembled by reprecipitation technique characterized fluorescence emission...
UV- and blue-emitting graphene quantum dots (GQDs) were synthesized from carbon nano-onions compared for metal ion sensing.
Nitrogen-doped graphene quantum dots (N-GQDs) have promising applications in catalysis and photoluminescence, but many existing synthetic methods require uses of harsh chemicals, long reaction times, complicated purification steps poor control over the surface functional groups. Laser ablation liquid (LAL) is a alternative method to prepare nanomaterials because its fast production, use fewer simple purification, byproducts product by precise tuning laser parameters. We report LAL produce...
The optical properties of top-down synthesized oxidized graphene quantum dots (ox-GQDs) and nitrogen-incorporating (N-GQDs) along a range hydrothermal treatment temperatures were observed.
Valorization of lignin to high-value chemicals and products along with biofuel production is generally acknowledged as a technology platform that could significantly improve the economic viability biorefinery operations. With growing demand for electrical energy storage materials, lignin-derived activated carbon (AC) materials have received increasing attention in recent years. However, there an apparent gap our understanding impact precursors (i.e., structure, composition inter-unit...
Metal halide perovskite nanocrystals (NCs) are attractive materials for optoelectronics. However, further improvements in stability, reproducibility, and photoluminescence quantum yield (ΦPL) essential enabling future applications. Inadequate surface passivation is a major cause of instability, irreproducibility, less than unity ΦPL. Herein, we probe the influence multiple ligand binding groups on colloidal stability ΦPL CsPbBr3 (NCs). We find that post-synthetic treatment with dodecanethiol...
Abstract Photocatalytic water splitting was performed on TiO 2 and metal‐containing (MTiO ) catalysts under UV light irradiation. added with various metals of different work functions, namely, Pt (5.93 eV), Pd (5.60 Cu (5.10 Ru (4.71 Ag (4.26 eV). The hydrogen production found to increase linearly increasing metal function. rate charge recombination increases decreasing function difference between the . were highly efficient co‐catalysts for generation from due their larger upward‐bent band...
Two types of temperature sensor which have pyrene (Pyr) and fullerene (C60) attached to poly(N-isopropylacrylamide) (PNIPAM) are synthesized, their thermal sensitivities examined in terms the fluorescence quenching efficiency C60: One is pyrene−poly(N-isopropylacrylamide)−fullerene (Pyr-PNIPAM-C60) has Pyr C60 each chain end PNIPAM, other pyrene−poly(N-isopropylacrylamide-co-fullerenylethyl methacrylate) (Pyr-P(NIPAM-co-C60)) one PNIAPM two C60s onto PNIPAM backbone. Both them exhibit same...
We report evidence for the transient formation of Cr(VI) oxide species in Trivalent Chrome Process (TCP) coating on AA2024-T3 alloys. TCP is leading replacement environmentally-unfriendly chromate conversion (CCC) that commonly used to pretreat aerospace aluminum Transient hexavalent chrome these coatings important learn about as presence this will affect active level corrosion protection well environmental impact coating. Specifically, we tested hypothesis dissolved O2 reduced H2O2 at...
The emissive properties of both doped and nondoped graphene quantum dots (GQDs) with sizes ranging from 3 to 11 nm were analyzed at the single particle level. Both GQDs are a composite particles exhibiting green, red, or NIR fluorescence on excitation 488, 561, 640 nm, respectively. Nitrogen-doped (N-GQDs) diameters 3.4 5.2 show larger proportion emission as compared particles. Doping also resulted in changes photostability intermittency seen GQD While milliseconds seconds time scale...
Mesoporous TiO2 films treated with N2/argon plasma were studied for ultraviolet and visible-light-induced photocatalytic water oxidation activity. Compared to pristine films, plasma-treated showed remarkable enhancement of photocurrents (up 80–240 times) in both light visible light, greatly surpassing enhancements previously reported the literature. The cubic-ordered mesoporous thin prepared by a surfactant-templated sol–gel method plasma, an approach hypothesized capitalize on high degree...
Ruthenium(II) complexes developed for photodynamic therapy (PDT) are almost exclusively tris-bidentate systems with C2 or D3 symmetry. This is due to the fact that this structural framework commonly produces long-lived excited states, which, in turn, allow generation of large amounts singlet oxygen (1O2) and other reactive species. Complexes containing tridentate ligands would be advantageous biological applications as they generally achiral (D2d C2v symmetry), which eliminates possibility...
Metabolomics approaches are becoming popular for a rational and efficient approach to standardize research including optimal harvest time determination improve the values of plant raw materials. In this study, multivariate statistical analysis metabolites from Artemisia gmelinii Weber ex Stechm (AG) by growth stage according (from June October) was performed ultra-performance liquid chromatography (UPLC) coupled with quadrupole flight mass spectrometry (Q-TOF/MS). Secondary metabolite...