A5100635599- ZnO doping and properties
- Polymer Surface Interaction Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Advanced Biosensing Techniques and Applications
- Catalytic Processes in Materials Science
- Electrospun Nanofibers in Biomedical Applications
- Graphene research and applications
- RNA Interference and Gene Delivery
- Photoreceptor and optogenetics research
- Advanced Sensor and Energy Harvesting Materials
- Stellar, planetary, and galactic studies
- Nanofabrication and Lithography Techniques
- GaN-based semiconductor devices and materials
- Catalysis and Oxidation Reactions
- Astronomy and Astrophysical Research
- Nanoparticle-Based Drug Delivery
- Optical Imaging and Spectroscopy Techniques
- Nanoparticles: synthesis and applications
- Advanced Fluorescence Microscopy Techniques
- Cardiac and Coronary Surgery Techniques
- Thin-Film Transistor Technologies
- Connective tissue disorders research
- Microfluidic and Capillary Electrophoresis Applications
- Astrophysical Phenomena and Observations
Seoul National University
2008-2024
Advanced Institute of Convergence Technology
2021-2024
Brown University
2024
Korea Research Institute of Chemical Technology
2021-2024
Kangwon National University
2007-2023
Institute for Basic Science
2017
Jeonbuk National University
2015
International St. Mary's Hospital
2015
Government of the Republic of Korea
2015
Catholic Kwandong University
2015
Electrospun nanofibers have been widely used as substrata for mammalian cell culture owing to their structural similarity natural extracellular matrices. Structurally consistent electrospun can be produced with synthetic polymers but require chemical modification graft cell-adhesive molecules make the functional. Development of a facile method grafting functional on will contribute production diverse type-specific nanofiber substrata. Small molecules, peptides, and functionalized gold...
We demonstrate that surface plasmon resonance (SPR) is applicable to the optical detection of neural signals. A low-noise SPR sensor was developed as a label- and artifact-free method for extracellular recording activity. The responses obtained from rat sciatic nerve were highly correlated with simultaneously recorded electrical responses. Additional studies stimulation intensity lidocaine further confirmed optically measured signals originated activities.
Various strategies for combination therapy to overcome current limitations in cancer have been actively investigated. Among them, simultaneous delivery of multiple drugs is a subject high interest due anticipated synergistic effect, but there difficulties designing and developing effective nanomaterials this purpose. In work, dual-pore coexisting hybrid porous silica nanoparticles are developed through Volmer-Weber growth pathway efficient co-delivery gene anticancer drug. Based on the...
The selective catalytic reduction of NO using urea (urea-SCR) is one the promising technologies for removing x from diesel engine exhaust. engine-out reduced by ammonia (NH 3 ) derived over a catalyst to environmentally benign N 2 . In this paper, we investigate effect various reactor operating conditions on performance three different formulations (e.g., Cu-zeolite, Fe-zeolite, Vanadium-based) obtain useful guidance in design and operation urea-SCR lean emission control systems. We examine...
Triggering changes in surface porosity enabled the controlled release of biomolecules from elastin-like polypeptide (ELP) microspheres. The transition temperature (Tt) cross-linked microspheres was determined by differential scanning calorimetry, and Tt agreement with volume observed changing external incubation media. thermoresponsive pore structure ELP their morphology were examined field-emission electron microscopy. investigated as a smart drug carrier using model molecules, bovine serum...
The rapid response of a smart material surface to external stimuli is critical for application cell-based biochips. sharp and controllable phase transition elastin-like polypeptide (ELP) enabled reversible cell adhesion on the by changing temperature or salt concentration in system. First, ELP micropatterns were prepared glass modified into aldehyde. lysine-containing (ELP-K) was genetically synthesized from E. coli conjugation with aldehyde surface. monitored PBS culture media using...
We report on an observing campaign in 2001 March to monitor the brightness of later arriving Q0957+561B image order compare with previously published observations (first-arriving) A image. The 12 participating observatories provided 3543 frames, which we have analyzed for fluctuations. From our classical methods time-delay determination, find a 417.09 ± 0.07 day time delay, should be free effects due incomplete sampling. During period, quasar was relatively constant and only small...
Fluorescent Au nanocrystals (AuNCs)-silica hybrid nanocomposite (FLASH) was synthesized by co-condensation of surface-modified AuNCs. Present FLASH exhibited four times the enhanced photoluminescence and photocatalytic activity compared to single nanocrystals. On basis these optical features, we successfully demonstrated in vitro fluorescence bioimaging introduced human cervical cancer cell line (HeLa). Beyond confirmation from photodegradation methylene blue as a model compound, regional...
The on-board production of a reducing gas mixture from liquid hydrocarbon for controlling diesel engine NOx emissions is being considered as an alternative to the other technologies that require supplemental agents such urea. Among catalysts evaluated formation acetaldehyde by partial oxidation ethanol under reaction conditions are suitable side-stream fuel reforming device, silver, molybdenum, and vanadium have been identified be most promising this application. Mo/Al2O3 exhibit highest...
This paper investigates the chemical modification of a cell-repellent poly(ethylene glycol) (PEG)-based polymer to enhance its hydrophilicity with sulfonate groups, and application in fabrication cell microarray. First, comprised methyl methacrylate (MMA) backbone PEG side-chains (PMMA-b-PEG) was synthesized from three monomers by radical polymerization purified. Despite hydrophilic side-groups amphiphilic polymer, structure's hydrophobicity allows for local adsorption biomolecules...
The fabrication of multi-dimensional nanocomposites has been extensively attempted to achieve synergistic performance through the uniform mixing functional constituents. Herein, we report a one-pot composed carbon nanotubes (CNTs) and Al2O3 powder. Our strategy involves synthesis CNTs on entire surface using rotatable chemical vapor deposition system (RCVD). Ehylene ferritin-induced nanoparticles were used as source wet catalyst, respectively. RCVD was quartz reaction tube, 5.08 cm in...
An observing campaign with 10 participating observatories has undertaken to monitor the optical brightness of Q0957 gravitationally lensed quasar for consecutive nights in 2000 January. The resulting A image curve significant fluctuations and makes a photometric prediction B light second planned 2001 March 12-21. ultimate purpose is determine gravitational lens time delay fraction an hour seek evidence rapid microlensing.
We report preliminary results on high-resolution in vivo imaging of fast intrinsic optical signals neuronal activity the frequency domain. An coherence tomography (OCT) system was used for dynamic cross section rodent somatosensory cortex at 250 frame/s. Neurons were excited by contralateral forepaw stimulation, and ipsilateral stimulated as a control. Hemodynamic responses cortical surface, which simultaneously measured using CCD, confirmed that stimulation properly evoked activation....
Two-dimensional materials have attracted great attention for their outstanding electronic properties. In particular, molybdenum disulfide (MoS2) shows potential as a next-generation semiconductor due to its tunable direct bandgap with high on–off ratio and extraordinary stability. However, the performance of MoS2 synthesized by physical vapor deposition has been limited contact resistance between an electrode MoS2, which determines overall device characteristics. Here, in order reduce...