A5100424867- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Advanced Sensor and Energy Harvesting Materials
- Dielectric materials and actuators
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Organic Electronics and Photovoltaics
- Advanced battery technologies research
- Advanced Memory and Neural Computing
- Electrochemical sensors and biosensors
- Molecular Junctions and Nanostructures
- Transition Metal Oxide Nanomaterials
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Electrocatalysts for Energy Conversion
- Process Optimization and Integration
- Crystallization and Solubility Studies
- Ferroelectric and Piezoelectric Materials
- Phase Equilibria and Thermodynamics
- Advanced Nanomaterials in Catalysis
- Synthesis and properties of polymers
- Carbon Dioxide Capture Technologies
- Gas Sensing Nanomaterials and Sensors
- Numerical methods for differential equations
Hongik University
2014-2024
Korea Institute of Industrial Technology
2024
Korea International Cooperation Agency
2024
Chungbuk National University
2024
Purdue University West Lafayette
2019
Samsung (South Korea)
2014
Gwangju Institute of Science and Technology
2013
Pohang University of Science and Technology
2008-2012
Ulsan National Institute of Science and Technology
2012
Pusan National University
2012
Among electrochemical energy storage (EES) technologies, rechargeable batteries (RBs) and supercapacitors (SCs) are the two most desired candidates for powering a range of electrical electronic devices. The RB operates on Faradaic processes, whereas underlying mechanisms SCs vary, as non-Faradaic in double-layer capacitors (EDLCs), at surface electrodes pseudo-capacitors (PCs), combination both hybrid (HSCs). EDLCs offer high power density but low density. HSCs take advantage process without...
Electrochemical impedance spectroscopy (EIS) is one of the most important tools to elucidate charge transfer and transport processes in various electrochemical systems including dye-sensitized solar cells (DSSCs). Even though there are many books reports on EIS, it often very difficult explain EIS spectra DSSCs. Understanding through calculating spreadsheet can be a powerful approach as user, without having any programming knowledge, go each step calculation get instant feedback by...
Abstract Novel digital memory devices were fabricated with a thermally and dimensionally stable polyimide containing carbazole moieties in its side groups by using simple conventional solution coating process. The exhibit excellent unipolar ON OFF switching behavior. With very low power consumption, the can be repeatedly written, read, erased air. ON/OFF current ratio of is high up to 10 11 . stability devices, as well their repeatable writing, reading, erasing capability open possibility...
We have synthesized a new thermally and dimensionally stable polyimide, poly(4,4'-amino(4-hydroxyphenyl)diphenylene hexafluoroisopropylidenediphthalimide) (6F-HTPA PI). 6F-HTPA PI is soluble in organic solvents thus easily processed with conventional solution coating techniques to produce good quality nanoscale thin films. Devices fabricated films thicknesses less than 77 nm exhibit excellent unipolar write-once-read-many-times (WORM) memory behavior high ON/OFF current ratio of up 10(6),...
We have fabricated electrically programmable memory devices with thermally and dimensionally stable poly(N-(N',N'-diphenyl-N'-1,4-phenyl)-N,N-4,4'-diphenylene hexafluoroisopropylidene-diphthalimide) (6F-2TPA PI) films investigated their switching characteristics reliability. 6F-2TPA PI were found to reveal a conductivity of 1.0 × 10−13–1.0 10−14 S cm−1. The exhibit versatile that depend on the film thickness. All are initially present in OFF state. thickness >15 <100 nm excellent...
A novel electrochemical sensor was fabricated by simply screen printing reduced graphene oxide (rGO) paste on F-doped tin (FTO) (rGO-SP-FTO) followed sintering at 450°C in Argon and employed for detecting dopamine (DA) uric acid (UA) simultaneously. The rGO film characterized using Raman spectroscopy, field emission scanning electron microscope (FE-SEM), Fourier transform infrared spectroscopy (FTIR). surface sensing features of rGO-SP-FTO were studied with impedance (EIS) cyclic voltammetry...
In this work, an ionic conjugated polymer with propargyl side groups (poly(2-ethynylpyridinum bromide); PEP-P) was synthesized. High-quality thin films smooth surfaces were prepared from on silicon substrates and metal electrodes, via a conventional, simple solution-coating drying process. Synchrotron X-ray scattering analysis showed that the in nanoscale amorphous, but somewhat preferentially oriented film plane, rather than randomly oriented. Using synchrotron reflectivity analysis,...
A new oxadiazole-containing brush polymer, poly(5-phenyl-1,3,4-oxadiazol-2-yl-[1,1′-biphenyl]carboxyloxy-n-nonyl acrylate) (PPOXBPA), was synthesized. The polymer thermally stable up to 350 °C. Below the degradation temperature, it showed a glass transition, crystal melting and liquid isotropic melt transition. Its optical electrochemical properties were also investigated. This found always self-assemble into multibilayer structure, with partial interdigitation between bristles from...
We present the regenerative label-free fiber optical biosensor that exploits surface plasmon resonance for quantitative detection of fibrinogen (Fbg) extracted from human blood plasma.The sensor head was made up a multimode with its polymer cladding replaced by metal composite nanometer thickness silver, aluminum, and nickel. The Ni layer coated allowed direct immobilization histidine-tagged peptide (HP) on without an additional cross-linker in between. On HP layer, immunoglobulin G then...
Delivery of bioactive materials into a cell is highly important in the study biology and medical treatments. Ideal nanoinjectors should be able to deliver biomaterials with high spatial resolution while causing minimum damage. We developed Au nanowire (NW) nanoinjector that has thinnest diameter (100–150 nm) among DNA delivering devices as well optimum mechanical properties, minimizing Well-defined (111) single-crystalline surface electric conductivity NW allow precisely timed efficient...