A5068356054- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Engineering Applied Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Hybrid Renewable Energy Systems
- Acute Myeloid Leukemia Research
- Nanoparticles: synthesis and applications
- Electric Vehicles and Infrastructure
- Maritime Transport Emissions and Efficiency
- Copper-based nanomaterials and applications
- Electrocatalysts for Energy Conversion
- Nanomaterials for catalytic reactions
- Near-Field Optical Microscopy
- Orbital Angular Momentum in Optics
- Advanced Cellulose Research Studies
- Various Chemistry Research Topics
- Nanofabrication and Lithography Techniques
- 3D IC and TSV technologies
- Marine and Coastal Research
- Optical properties and cooling technologies in crystalline materials
- Retinoids in leukemia and cellular processes
- Marine Biology and Environmental Chemistry
- Pharmacological Receptor Mechanisms and Effects
- Biosensors and Analytical Detection
- Mechanical Behavior of Composites
Kunsan National University
2019-2024
Seoul National University
1997-2022
Twin Cities Orthopedics
2018
University of Minnesota
2018
Chung-Ang University
2013
GS Caltex (South Korea)
2004
ConspectusThe initial observations of surface-enhanced Raman scattering (SERS) from individual molecules (single-molecule SERS, SMSERS) have triggered ever more detailed mechanistic studies on the SERS process. The not only reveal existence extremely enhanced and confined fields at gaps Ag or Au nanoparticles but also that spatial, spectral, temporal behaviors SMSERS signal critically depend many factors, including plasmon resonances nanostructures, diffusion (lateral orientational)...
Spinal astrocytes have emerged as important mechanistic contributors to the genesis of mechanical allodynia (MA) in neuropathic pain. We recently demonstrated that spinal sigma non-opioid intracellular receptor 1 (σ1 receptor) modulates p38 MAPK phosphorylation (p-p38), which plays a critical role induction MA rats. However, histological and physiological relationships among σ1, p-p38 astrocyte activation is unclear.We investigated: (i) precise location σ1 receptors dorsal horn; (ii) whether...
This study presents a simple and effective method for fabricating porous photocatalyst composite membrane with excellent wet strength, utilizing cellulose nanofibril (CNF) zinc oxide–silver (ZnO–Ag) nanorod (NRs) treating dye-contaminated water. The self-standing CNF high strength was prepared by NaOH treatment. Besides treatment also controlled the pore characteristics of membrane, which could tightly attach NRs in them. simply drop-drying ZnO–Ag onto ensuring attachment within pores....
The paper presents experimental results from the operation of a proto-type green ship in Geoje island, South Korea. After ground testing with stand-alone PV generation system, this system was added to conventional diesel ship. Proto-type is consisted photovoltaic (PV) engine, battery energy storage, hybrid control and grid-connected inverter. aim not only minimize fuel consumption but also support power grid as distributed (DG) near future.
A well-designed narrow gap between noble metal nanostructures plays a prominent role in surface-enhanced Raman scattering (SERS) to concentrate electromagnetic fields at the local point, called "hot spot". However, SERS-active substrate fabrication remains substantial hurdle due high process cost and difficulty of engineering efficient plasmonic hot spots target area. In this study, we demonstrate simple photolithographic method for generating ultrasensitive SERS desired positions. The...
Abstract We provide a technical report on designing an Arduino-based wireless spectrometer using old spectrometer. The designed is environmentally friendly and cost-effective can be used in physical analytical laboratories. enables students to understand the fundamental theory of spectroscopy communication among instruments. rotating motions mirror grating turret inside are controlled by pre-written source code based Arduino program. This procedure give insight into spectroscopic analysis...
We introduce and describe performance of the 6-meter telescope Seoul Radio Astronomy Observatory (SRAO). All softwares instruments except antenna structure its driving system are developed for ourselves. The SIS mixer type receiver resulted in noise temperature less than 50 K (DSB) over whole 3-mm radio window. An autocorrelation spectrometer, first Korea, provides maximum MHz band width 1024 channels. Antenna surface is measured adjusted using template method holography which a superb...
Realizing bright colloidal infrared emitters in the midwavelength (or mid-IR), which can be used for low-power IR light-emitting diodes (LEDs), sensors, and deep-tissue imaging, has been a challenge last few decades. Here, we present tellurium nanowires with strong emission intensity at room temperature even lasing 3.6 μm (ω) under cryotemperature. Furthermore, second-harmonic field 1.8 (2ω) third-harmonic 1.2 (3ω) are successfully generated thanks to intrinsic property of nanowire. These...
Plasmonic nanoparticles (NPs) hold considerable potential as photocatalysts owing to their robust light–matter interactions across diverse electromagnetic wavelengths, which significantly influence the photophysical characteristics of adjacent molecular entities. Despite widespread use noble-metal NPs in surface-enhanced Raman scattering (SERS) applications, little is known about kinetics nanoparticle aggregation and how it affects configurations. This study investigates plasmon-driven...
Optical trapping using nanoapertures in metal films has advanced significantly recent years, allowing for the of nanoparticles single digit nanometer range, including proteins. It been recognized previously by theoretical studies coaxial that apertures with small gaps a film can provide extremely large potentials such nanoparticles. However, past approaches to nanofabrication, as focussed ion beam milling, do not reliably produce sub-10 nm features. Here we demonstrate use combined...
This paper describes the system configuration and some results of prototype wide-band digital autocorrelation spectrometer for radio astronomy observation, which will be used as back-end 2/3mm dual channels SIS receiver at Taeduk Radio Astronomy Observatory. consists high-speed sampler module, circular memory buffer correlator module based on QUAINT chip. The developed autocorrelator shows good performance 50MHz 100MHz mode with 10MHz CW source input. After calibration procedure, this can use TRAO
We report the development of a Ti–Ti bonding process at low temperature below 200 °C using chemically surface-activated Ti thin films and reliable evaluation method for measuring bond strength by means atomic force microscopy (AFM). Using as an interlayer enables void-free because exhibits fast diffusion oxide solubility. On other hand, wafer is important processing step 3D circuit integration that requires high reliability process. However, bonding-strength values obtained employing...
Plasmonic nanoparticles (NPs) hold considerable promise as photocatalysts owing to their robust light-matter interactions over a wide range of electromagnetic wavelengths, which significantly influence the photophysical characteristics adjacent molecular entities. In this study, we investigated plasmon-driven photochemical conversion 4-nitrobenzenethiol (NBT) into 4,4′-dimercaptoazobenzene (DMAB) on Au and Ag nanorods using surface-enhanced Raman scattering (SERS). The photoconversion...