A5075473373- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- TiO2 Photocatalysis and Solar Cells
- Perovskite Materials and Applications
- Luminescence and Fluorescent Materials
- Thin-Film Transistor Technologies
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Asymmetric Synthesis and Catalysis
- Nanoplatforms for cancer theranostics
- Advanced biosensing and bioanalysis techniques
- Synthetic Organic Chemistry Methods
- Molecular Junctions and Nanostructures
- Porphyrin and Phthalocyanine Chemistry
- Photochemistry and Electron Transfer Studies
- Synthesis and properties of polymers
- Nonlinear Optical Materials Research
- Chalcogenide Semiconductor Thin Films
- Chemical Synthesis and Analysis
- Nonlinear Optical Materials Studies
- RNA Interference and Gene Delivery
- Semiconductor materials and interfaces
- Analytical Chemistry and Sensors
- Copper-based nanomaterials and applications
Konkuk University
2014-2023
Yonsei University
2016-2023
Konkuk University Medical Center
2009-2018
Government of the Republic of Korea
2017-2018
Gwangju University
2017-2018
Fraunhofer Institute for Solar Energy Systems
2016-2017
Fraunhofer Society
2015
Kangwon National University
2012
Chonnam National University Hospital
2010
Shanghai Jiao Tong University
2009
Many aptamers have been evaluated for their ability as drug delivery vehicles to target ligands, and a variety of small interfering RNAs (siRNAs) tested anti-cancer properties.However, since these two types molecules similar physicochemical properties, it has so far difficult formulate siRNA-encapsulating carriers guided by aptamers.Here, we propose aptamer-coupled lipid nanocarriers encapsulating quantum dots (QDs) siRNAs theragnosis triple-negative breast cancer (TNBC).Methods: Hydrophobic...
Abstract Co-application of fluorescent quantum dot nanocrystals and therapeutics has recently become a promising theranostic methodology for cancer treatment. We developed tumor-targeted lipid nanocarrier that demonstrates notable efficacy in gene delivery as well tumor bio-imaging. Coupling aptamer molecules against the EGF receptor (EGFR) to distal termini nanoparticles provided carrier with tumor-specific recognition capability. The cationic component, referred O , ’-dimyristyl-N-lysyl...
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...
Triple-negative breast cancer (TNBC) cells do not contain various receptors for targeted treatment, a reason behind the poor prognosis of this disease. In study, biocompatible theranostic erythrocyte-derived nanoparticles (EDNs) were developed and evaluated effective early diagnosis treatment TNBC. The anti-cancer drug, doxorubicin (DOX), was encapsulated into EDNs diagnostic quantum dots (QDs) incorporated lipid bilayers tumor bio-imaging. Then, anti-epidermal growth factor receptor (EGFR)...
Oligofluorenes (a trimer, pentamer, and heptamer) with one fluorenone unit in the center (OFnK: n=3, 5, or 7) were synthesized used as models to understand origin of low-energy emission band photoluminescence electroluminescence spectra some polyfluorenes. All compounds form glasses T(g) at 30 degrees C (OF3 K), 50 (OF5 K) 57 (OF7 K). Oligomers OF5 K OF7 exhibit smectic liquid crystal phases that undergo transition isotropic melts 107 205 C, respectively. Oligomer could be obtained single...
Polymer solar cells (PSCs) consisting of fullerene bis-adduct and poly(3-hexylthiophene) (P3HT) blends have shown higher efficiencies than P3HT:phenyl C(61)-butyric acid methyl ester (PCBM) devices, because the high-lying lowest unoccupied molecular orbital (LUMO) level bis-adducts. In contrast, use bis-adducts in donor-acceptor (DA) copolymer systems typically causes a decrease device's performance due to decreased short-circuit current (J(SC)) fill factor (FF). However, reason for such...
Intramolecular rotation around the vinyl moiety plays an important role in whole AIE process of DSA derivatives.
Tumor-targeted theranostic nanoparticles prepared by considering nano-bio interactions exhibited improved tumor imaging and efficient inhibition of growth.
Upconversion-induced fluorescence in platinum-octaethylporphyrin (PtOEP)-doped thin films of a spirobifluorene-anthracene copolymer has been investigated. Upon exciting the range absorption band (2.31 eV, 537 nm) guest molecules, blue (2.75 450 from spirobifluorene host was observed. The intensity upconverted emission found to be one order magnitude higher than PtOEP doped but anthracene-free and previously reported for metallated porphyrin-doped polyfluorene samples. It is argued that...
Organic nonlinear optical materials combining high luminescence quantum yields and large two-photon absorption cross-sections are attractive for both fundamental research practical applications, such as up-converted lasers fluorescence microscopy. Herein, we reported a series of conjugated dendrimers (AnG0, AnG1, AnG2) which showed weak emissions in dilute solution due to the twisted intramolecular charge transfer (TICT) free rotational motion. On contrary, (up 0.85) have been observed...
Novel boron dipyrromethene (BODIPY) derivatives having significant absorption and emission in the longer wavelength region were synthesized. BODIPY showed anomalous S2 from second excited (S2) state at shorter wavelength. The photodynamics of was investigated by fluorescence up-conversion transient spectroscopic measurements. decay time dependent on internal conversion intersystem crossing process. assignments transitions supported a theoretical calculation based time-dependent density...
The internal absorption, charge recombination and collection in HC(NH<sub>2</sub>)<sub>2</sub>PbI<sub>3</sub> (FAPbI<sub>3</sub>) perovskite solar cells with P3HT spiro-OMeTAD as the HTL are investigated. results show that can affect absorption spectra of layers, is beneficial for reducing enhancing PeSCs.
The current noninvasive diagnostic approaches for detecting bladder cancer (BC) often exhibit limited clinical performance, especially the initial diagnosis. This study aims to evaluate validity of a streamlined urine-based PENK methylation test called EarlyTect BCD in BC patients with hematuria scheduled cystoscopy Korean and American populations. seamlessly integrates two steps, linear target enrichment quantitative methylation-specific PCR within single closed tube. detection limitation...
Steady state as well time-resolved fluorescence of phenyl-substituted polyphenylenevinylene (PhPPV), both in solution and form spin-coated films has been measured. In the decays exponentially with a 1/e decay time ∼700 ps, whereas film is ∼400 ps approaches stretched exponential an exponent β=0.65. Doping various amounts trinitrofluorenone (TNF) shortens without changing Kohlrausch–Williams–Watts law. This signature exciton dissociation random polymer matrix through electron transfer to TNF....
Employing the time-of-flight (TOF) technique, hole mobility in films of polyphenylenevinylene-ether has been measured as a function electric field and temperature. Charge carriers were generated upon either photoexcitation into S1←S0 transition polymer or via sensitized injection from thin rhodamine 6G layer. The results will be interpreted terms concept hopping among segments featuring Gaussian distribution energies, its variance being 91 meV. While TOF signals are similar to those...
Hole transport in a polyspirobifluorene homopolymer and statistical polyspirobifluorene-triarylamine copolymer has been studied detail employing the charge-generation layer time-of-flight (TOF) technique over wide range of electric fields temperatures. Both materials exhibit nondispersive TOF signals after injection sheet charge carriers from thin (10nm) perylene-diimide charge-carrier generation into relatively thick (d&gt;1μm) polymer film. Results were analyzed within framework...
The photoluminescence (PL) properties of oligofluorenes with 2-ethylhexyl group in 9, 9′ position solution and as thin films were investigated by time-resolved techniques at both room temperature 77 K. fluorescence lifetimes the oligomers decrease chain length. τ follow relation τ=386+808(1∕n) (ps) where n is number fluorene units oligomer. Concentration laser excitation energy dependences PL spectra are also given. Phosphorescence was observed for frozen matrix MTHF lifetime phosphorescence...
Silicon in [Cl--SiH(3)--Cl](-) is hypervalent, whereas carbon [Cl--CH(3)--Cl](-) not. We have recently shown how this can be understood terms of the ball-in-a-box model, according to which silicon fits perfectly into box that constituted by five substituents, too small and, a sense, "drops bottom" box. But does acquire hypervalency isostructural and isoelectronic noble gas (Ng)/methyl cation complexes [Ng--CH(3)--Ng](+) (Ng=He Ne), feature delocalized D(3h)-symmetric structure with two...
Semiconductor quantum dots (QDs) are promising photocatalysts for water splitting due to the large specific area, but influence of surface trap states on photocatalytic activity QDs is still not fully understood yet. To answer this question, CdSe with same morphology, diameter, crystal structure, and energy level prepared following a hydrazine hydrate (N2H4) promoted synthesis strategy conventional hydrothermal method. Through various characterizations analysis, it found that synthesized...
The Y-shaped, low molecular mass, hole-conductor (HC), acidic coadsorbents 4-{3,7-bis[4-(2-ethylhexyloxy)phenyl]-10H-phenothiazin-10-yl}benzoic acid (PTZ1) and 4-{3,7-bis[4-(2-ethylhexyloxy)phenyl]-10H-phenothiazin-10-yl}biphenyl-4-carboxylic (PTZ2) were developed. Owing to their tuned negative-shifted HOMO levels (vs. NHE), they used as HC in dye-sensitized solar cells (DSSCs) improve cell performance through desired cascade-type hole-transfer processes. Their detailed functions DSSCs...