A5100330080- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Supercapacitor Materials and Fabrication
- IPv6, Mobility, Handover, Networks, Security
- Advanced Photonic Communication Systems
- Advanced Memory and Neural Computing
- Advanced Optical Network Technologies
- Optical Network Technologies
- Advanced Wireless Network Optimization
- Wireless Networks and Protocols
- Conducting polymers and applications
- Advanced battery technologies research
- Transition Metal Oxide Nanomaterials
- Semiconductor Lasers and Optical Devices
- Radio Frequency Integrated Circuit Design
- Software-Defined Networks and 5G
- HVDC Systems and Fault Protection
- Advanced Power Amplifier Design
- Wireless Communication Networks Research
- Ferroelectric and Negative Capacitance Devices
- Advanced Sensor and Energy Harvesting Materials
- Advanced Battery Materials and Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Advanced DC-DC Converters
Nanyang Technological University
2023-2025
Seoul National University
2019-2024
Kyoto Katsura Hospital
2012-2024
Kyoto University
2012-2024
Korea Electric Power Corporation (South Korea)
2024
Inha University
2021-2024
Gachon University
2017-2024
Samsung (South Korea)
2022-2024
Korea University
2012-2023
Sungkyunkwan University
2016-2023
A lot of development in terms science and technology has taken place to address the increasing energy needs. This demand is expected increase, especially due environmental concerns associated with fossil fuels which have led aggressive research toward storage materials devices. Looking at this emerging trend, devices that can convert, store, save are need hour. Electrochromic assimilate these functionalities, along bias-induced color modulation, very promising as they not only help...
We propose a hardware-friendly architecture of convolutional neural network using 32 × memristor crossbar array having an overshoot suppression layer. The gradual switching characteristics in both set and reset operations enable the implementation 3-bit multilevel operation whole that can be utilized as 16 kernels. Moreover, binary activation function mapped to read voltage ground is introduced evaluate result training with boundary 0.5 its estimated gradient. Additionally, we adopt fixed...
Fast-scan cyclic voltammetry (FSCV) with carbon-fiber microelectrodes has been successfully used to detect catecholamine release in vivo. Generally, waveforms anodic voltage limits of 1.0 or 1.3 V (vs Ag/AgCl) are for detection. The excursion provides good temporal resolution but suffers from a lack sensitivity. increases sensitivity also response time, which can blur the detection neurochemical events. Here, scan rate was increased improve while maintaining rapid response. However,...
Water-in-salt electrolytes (WiSEs) are a promising candidate for use in energy storage devices because of their wide electrochemical stability window (ESW) that overcomes the thermodynamic limit water electrolysis (1.23 V). Despite high density arising from ESW, it is assumed power WiSE-based will always be less than those operate with dilute higher viscosity WiSEs. However, present study demonstrates ion transport high-concentration WiSE (17 m NaClO4) can as fast electrolyte (1 NaClO4),...
In view of the need for environmental friendliness and cost effectiveness, enhancement energy density aqueous supercapacitor is in high demand. Recently, concentrated electrolytes known as water-in-salt (WiSEs) have attracted much attention due to their broad electrochemical stability window (2–3 V) relative that conventional dilute (∼1 V). Meanwhile, development redox-active has provided a great opportunity improve capacitance supercapacitors by providing an additional pseudocapacitive...
Abstract Supercapacitors (SCs) are considered to be a promising energy storage device owing their high‐power characteristics and long‐term cycling stabilities. Recently, ultrafast SCs have been extensively studied in the context of replacing aluminum electrolytic capacitors (AECs) that currently used for alternating current (AC) line filtering applications. Since generally more compact higher density, as compared AECs, replacement AECs with can lead miniaturization electronic devices. Here...
To apply resistive random‐access memory (RRAM) to the neuromorphic system and improve performance, each cell in array should be able operate independently by reducing device variation. In addition, it is necessary lower operating current of RRAM enable gradual switching characteristics mimic low‐energy operations biological. most filamentary RRAMs, however, overshoot occurs forming stage, shows large variation, high current, abrupt set reset characteristics. Herein, shortcomings occurring...
Carbon monoxide (CO) poisoning can easily occur in industrial and domestic settings, causing headaches, loss of consciousness, or death from overexposure. Commercially available CO gas sensors consume high power (typically 38 mW), whereas low-power using nanostructured materials with catalysts lack reliability uniformity. A (1.8 mW @ 392 °C), sensitive, selective, reliable, practical sensor is presented. The adopts floated WO3 film as a sensing material to utilize the unique reaction lattice...
Oxygen vacancies and adsorbed oxygen species on metal oxide surfaces play important roles in various fields. However, existing methods for manipulating surface require severe settings are ineffective repetitive manipulation. We present a method to manipulate the amount of by modifying adsorption energy electrically controlling electron concentration oxide. The control ability is verified using first-principles calculations based density functional theory (DFT), X-ray photoelectron...
The authors propose a design method for hierarchical crossconnect wavelength-division-multiplexed networks employing two-stage multiplexing scheme of waveband and wavelength, in order to reduce the complexity size optical at nodes. is formed by grouping lightpaths with same destination network. present an integer linear programming formulation routing lightpaths, heuristic also proposed as practical find solution general large-scale networks. It found that can largely requirements, although...
The development of synthetic methods for monodisperse nanomaterial is great importance in science and technology related to nanomaterials. strong demands prepare exceptionally nanocrystals have made digestive-ripening one the most sought-after size-focusing processes. Although processes been demonstrated produce various metals semiconductors, their applicability oxides has rarely studied despite unique properties applications oxide In this work, we demonstrate successful synthesis V-doped...
A redox-active electrolyte supercapacitor (RAES) is a promising system that increases the energy density of by providing additional pseudocapacitance, which arises from an inserted redox couple in electrolyte. However, RAESs still considerably low for practical applications, and enhancing operating voltage window as well capacitance very necessary. In this study, we rationally designed nonaqueous mainly on basis relative position electrochemical stability supporting potential couple....