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366 results on '"Jung, Jinwook"'

101. Wearable Electronics: Biocompatible Cost‐Effective Electrophysiological Monitoring with Oxidation‐Free Cu–Au Core–Shell Nanowire (Adv. Mater. Technol. 12/2020)

Author

Kim, Dongkwan, primary, Bang, Junhyuk, additional, Won, Phillip, additional, Kim, Youngtaek, additional, Jung, Jinwook, additional, Lee, Jinwoo, additional, Kwon, Jinhyeong, additional, Lee, Habeom, additional, Hong, Sukjoon, additional, Jeon, Noo Li, additional, Han, Seungyong, additional, and Ko, Seung Hwan, additional

Published
2020
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103. DATC RDF-2020

Author

Chen, Jianli, primary, Jiang, Iris Hui-Ru, additional, Jung, Jinwook, additional, Kahng, Andrew B., additional, Kravets, Victor N., additional, Li, Yih-Lang, additional, Lin, Shih-Ting, additional, and Woo, Mingyu, additional

Published
2020
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104. Routing-free crosstalk prediction

Author

Liang, Rongjian, primary, Xie, Zhiyao, additional, Jung, Jinwook, additional, Chauha, Vishnavi, additional, Chen, Yiran, additional, Hu, Jiang, additional, Xiang, Hua, additional, and Nam, Gi-Joon, additional

Published
2020
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108. Laser-Induced Crystalline-Phase Transformation for Hematite Nanorod Photoelectrochemical Cells

Author

Kong, Heejung, primary, Kwon, Jinhyeong, additional, Paeng, Dongwoo, additional, Jung, Won Jun, additional, Ghimire, Santosh, additional, Dho, Joonghoe, additional, Yoo, Jae-Hyuck, additional, Hong, Sukjoon, additional, Jung, Jinwook, additional, Shin, Jaeho, additional, Grigoropoulos, Costas P., additional, Ko, Seung Hwan, additional, and Yeo, Junyeob, additional

Published
2020
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109. Digital Laser Micropainting for Reprogrammable Optoelectronic Applications

Author

Lee, Younggeun, primary, Kwon, Jinhyeong, additional, Lim, Jaemook, additional, Shin, Wooseop, additional, Park, Sewoong, additional, Hwang, Eunseung, additional, Shin, Jaeho, additional, Cho, Hyunmin, additional, Jung, Jinwook, additional, Kim, Hyun‐Jong, additional, Han, Seungyong, additional, Lee, Habeom, additional, Son, Yong, additional, Ha, Cheol Woo, additional, Prabhakaran, Prem, additional, Yeo, Junyeob, additional, Ko, Seung Hwan, additional, and Hong, Sukjoon, additional

Published
2020
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111. Artificial Thermal Sensation: Stretchable Skin‐Like Cooling/Heating Device for Reconstruction of Artificial Thermal Sensation in Virtual Reality (Adv. Funct. Mater. 29/2020)

Author

Lee, Jinwoo, primary, Sul, Heayoun, additional, Lee, Wonha, additional, Pyun, Kyung Rok, additional, Ha, Inho, additional, Kim, Dongkwan, additional, Park, Hyojoon, additional, Eom, Hyeonjin, additional, Yoon, Yeosang, additional, Jung, Jinwook, additional, Lee, Dongjun, additional, and Ko, Seung Hwan, additional

Published
2020
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120. Wearable Temperature Sensors: Sensitive Wearable Temperature Sensor with Seamless Monolithic Integration (Adv. Mater. 2/2020)

Author

Shin, Jaeho, primary, Jeong, Buseong, additional, Kim, Jinmo, additional, Nam, Vu Binh, additional, Yoon, Yeosang, additional, Jung, Jinwook, additional, Hong, Sukjoon, additional, Lee, Habeom, additional, Eom, Hyeonjin, additional, Yeo, Junyeob, additional, Choi, Joonhwa, additional, Lee, Daeho, additional, and Ko, Seung Hwan, additional

Published
2020
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123. Directional Shape Morphing Transparent Walking Soft Robot

Author

Lee, Habeom, primary, Kim, Hyeonseok, additional, Ha, Inho, additional, Jung, Jinwook, additional, Won, Phillip, additional, Cho, Hyunmin, additional, Yeo, Junyeob, additional, Hong, Sukjoon, additional, Han, Seungyong, additional, Kwon, Jinhyeong, additional, Cho, Kyu-Jin, additional, and Ko, Seung Hwan, additional

Published
2019
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125. Magnetic states of atomic vacancies in graphite probed by scanning tunneling microscopy

Author

Youngtek Oh, Wonhee Ko, Jung Jinwook, Hwansoo Suh, Hyo Won Kim, Hyeokshin Kwon, Insu Jeon, Young Kuk, Yeonchoo Cho, Sungwoo Hwang, and JiYeon Ku

Subjects
010302 applied physics, Materials science, Spintronics, Condensed matter physics, Scanning tunneling spectroscopy, General Physics and Astronomy, Field strength, 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, 01 natural sciences, lcsh:QC1-999, Magnetic field, law.invention, Condensed Matter::Materials Science, law, 0103 physical sciences, Density functional theory, Scanning tunneling microscope, 0210 nano-technology, Anderson impurity model, lcsh:Physics
Abstract

Intrinsic defects in graphitic materials, like vacancies and edges, have been expected to possess magnetic states from the many-body interaction of localized electrons. However, charge screening from graphite bulk carriers significantly reduces the localization effect and hinders the observation of those magnetic states. Here, we use an ultra-low-temperature scanning tunneling microscope with a high magnetic field to observe the magnetic states of atomic vacancies in graphite generated by ion sputtering. Scanning tunneling spectroscopy reveals localized states at the vacancies, which exhibit splitting at a certain magnetic field whose separation increases with the field strength. The transition is well described by the “Anderson model,” which describes the emergence of localized magnetic states inside the metallic reservoir through electron–electron interaction. The interaction strength is estimated to be between 1 meV and 3 meV, which is supported by the density functional theory calculation. The observation provides an important foundation for application of intrinsic defects to carbon-based spintronic devices.

Published
2020

126. Development of virtual monochromatic imaging technique with spectral CT based on a photon-counting detector

Author

Choi Yuna, Duhgoon Lee, Jung Jinwook, Wooyoung Jang, Burnyoung Kim, Chang-Lae Lee, Seungwan Lee, Sooncheol Kang, and Jisoo Eom

Subjects
QAM, Transmission (telecommunications), business.industry, Modulation, Computer science, Bandwidth (signal processing), Electronic engineering, Spectral efficiency, business, Symbol rate, Digital signal processing, Transponder
Abstract

With the advent of the coherent age the implementation of massive digital signal processors (DSP) co-integrated with high speed AD and DA converters became feasible allowing for the realization of huge flexibility of transponders. Today the implementation of variable transponders is mainly based on variable programming of DSP to support different modulation formats and symbol rates. Modulation formats with high flexibility are required such as pragmatic QAM formats and hybrid modulation formats. Furthermore, we report on an implementable probabilistically shaping technique allowing for adjusting the bitrate. We introduce fundamental characteristics of all modes and describe basic operation principles. The modifications of the operational modes are enabled simply by switching between different formats and symbol rates in the DSP to adjust the transponders spectral efficiency, the bitrate and the maximum transmission distance. A fine granularity in bitrate and in maximum transmission distance can be implemented especially by hybrid formats and by probabilistically shaped formats. Furthermore, latter allow for ~+25% increase of the maximum transmission distance due their operation close to the Shannon limit as a consequence of their 2D Gaussian like signal nature. If the flexibility and programmability of transponders is implemented, it can be utilized to support different strategies for the application. The variability in symbol rate is mainly translated into variability in bitrate and in bandwidth consumption. Contrary the variable spectral efficiency translates into a variation of the maximum transmission reach and of the bitrate. A co-adjustment of both options will lead to a superior flexibility of optical transponders to address all requirements from application, transponder and fiber infrastructure perspective.

Published
2018

127. Sensitive Wearable Temperature Sensor with Seamless Monolithic Integration

Author

Shin, Jaeho, primary, Jeong, Buseong, additional, Kim, Jinmo, additional, Nam, Vu Binh, additional, Yoon, Yeosang, additional, Jung, Jinwook, additional, Hong, Sukjoon, additional, Lee, Habeom, additional, Eom, Hyeonjin, additional, Yeo, Junyeob, additional, Choi, Joonhwa, additional, Lee, Daeho, additional, and Ko, Seung Hwan, additional

Published
2019
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133. Moiré-Free Imperceptible and Flexible Random Metal Grid Electrodes with Large Figure-of-Merit by Photonic Sintering Control of Copper Nanoparticles

Author

Jung, Jinwook, primary, Cho, Hyunmin, additional, Choi, Seok Hwan, additional, Kim, Dongkwan, additional, Kwon, Jinhyeong, additional, Shin, Jaeho, additional, Hong, Sukjoon, additional, Kim, Hyeonseok, additional, Yoon, Yeosang, additional, Lee, Jinwoo, additional, Lee, Daeho, additional, Suh, Young D., additional, and Ko, Seung Hwan, additional

Published
2019
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139. Endoplasmic Reticulum Targeting Reactive Oxygen Species Sensor Based on Dihydrofluorescein: Application of Endoplasmic Reticulum Stress.

Author

Le, Hoa Thi, Jo, Hye‐Ryeong, Oh, Se‐Yun, Jung, Jinwook, Kim, Young Gi, Kang, Chulhun, and Kim, Tae Woo

Subjects
ENDOPLASMIC reticulum, OXYGEN detectors, REACTIVE oxygen species, CHEMORECEPTORS, TUNICAMYCIN
Abstract

Endoplasmic reticulum (ER) has a unique redox environment, which plays critical roles in the organelle's function and in its pathological responses such as ER stress. In this work, we introduce an ER‐targeting fluorogenic reactive oxygen species (ROS) chemosensor (ER‐Flu) from copper(I)‐catalyzed alkyne‐azide cycloaddition of 3‐propargyl ester of 2′,7′‐dichlorodihydrofluorescein diacetate and N3‐glibenclamide, which were adopted as a fluorogenic ROS sensing module and an ER‐targeting module, respectively. Thereby, a series of confocal microscopic experiments of ER‐Flu demonstrated that the sensor localizes in ER of the live cells and that ROS are elevated in the cells by ER stress inducers such as thapsigargin, brefeldin A, and tunicamycin. [ABSTRACT FROM AUTHOR]

Published
2021
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140. Digital Laser Micropainting for Reprogrammable Optoelectronic Applications.

Author

Lee, Younggeun, Kwon, Jinhyeong, Lim, Jaemook, Shin, Wooseop, Park, Sewoong, Hwang, Eunseung, Shin, Jaeho, Cho, Hyunmin, Jung, Jinwook, Kim, Hyun‐Jong, Han, Seungyong, Lee, Habeom, Son, Yong, Ha, Cheol Woo, Prabhakaran, Prem, Yeo, Junyeob, Ko, Seung Hwan, and Hong, Sukjoon

Subjects
LASERS, VISIBLE spectra, METALLIC oxides, OPTOELECTRONIC devices, BOLOMETERS, METALLIC surfaces
Abstract

Structural coloration is closely related to the progress of innovative optoelectronic applications, but the absence of direct, on‐demand, and rewritable coloration schemes has impeded advances in the relevant area, particularly including the development of customized, reprogrammable optoelectronic devices. To overcome these limitations, a digital laser micropainting technique, based on controlled thin‐film interference, is proposed through direct growth of the absorbing metal oxide layer on a metallic reflector in the solution environment via a laser. A continuous‐wave laser simultaneously performs two functions—a photothermal reaction for site‐selective metal oxide layer growth and in situ real‐time monitoring of its thickness—while the reflection spectrum is tuned in a broad visible spectrum according to the laser fluence. The scalability and controllability of the proposed scheme is verified by laser‐printed painting, while altering the thickness via supplementary irradiation of the identical laser in the homogeneous and heterogeneous solutions facilitates the modification of the original coloration. Finally, the proof‐of‐concept bolometer device verifies that specific wavelength‐dependent photoresponsivity can be assigned, erased, and reassigned by the successive application of the proposed digital laser micropainting technique, which substantiates its potential to offer a new route for reprogrammable optoelectronic applications. [ABSTRACT FROM AUTHOR]

Published
2021
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141. Low-strength electronic wastewater treatment using immobilized cells of TMAH-degrading bacterium followed by activated carbon adsorption

Author

Hyunseok Oh, Deokjin Jahng, Jung Jinwook, Benqin Yang, and Yong-Woo Lee

Subjects
Chemistry, Environmental engineering, Ocean Engineering, Pollution, Ammonium hydroxide, chemistry.chemical_compound, Activated sludge, Adsorption, Wastewater, Dissolved organic carbon, medicine, Sewage treatment, Effluent, Water Science and Technology, Nuclear chemistry, Activated carbon, medicine.drug
Abstract

An immobilized-cell process followed by activated carbon adsorption was developed to treat the tetra-methyl ammonium hydroxide (TMAH) containing low-strength electronic wastewater. The isolated TMAH-degrading bacterium (Mycobacterium sp. TMAH-W0418) and activated sludge were entrapped in polyethylene glycol cubes. The packing rate of 60% (v/v), biomass ratio between Mycobacterium and activated sludge of 2:3 (w/w), and total biomass of 7,000 mg/L were found to be optimal for removing dissolved organic carbon (DOC) and TMAH with the concentrations around 1 and 0.2 mg/L, respectively. Granular activated carbon was used to further decrease the DOC and TMAH in the effluent, and the concentrations of DOC and TMAH in the effluent of the combined system were below 1 mg/L and almost 0 mg/L, respectively. Scanning electron microscope results confirmed that cells were effectively immobilized in the polymer matrix. Thick biofilm on the surface of both polymer carriers and activated carbon granules was observe...

Published
2014

142. On the Coupling of Kinetic Thermomechanical Cucker-Smale Equation and Compressible Viscous Fluid System.

Author

Choi, Young-Pil, Ha, Seung-Yeal, Jung, Jinwook, and Kim, Jeongho

Abstract

In this paper, we pressent a global well-posedness of strong solutions and their emergent behaviors for the coupled kinetic-fluid system consisting of kinetic thermomechanical Cucker-Smale equation and compressible isentropic Navier-Stokes system. Particle and fluid systems are coupled via the drag force which is responsible for the asymptotic velocity alignment between kinetic equation and fluid system. For the well-posedness and velocity alignment, we employ an energy method and Lyapunov function method under suitable conditions on initial data and system parameters. [ABSTRACT FROM AUTHOR]

Published
2020
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143. DATC RDF

Author

Jung, Jinwook, primary, Jiang, Iris Hui-Ru, additional, Chen, Jianli, additional, Lin, Shih-Ting, additional, Li, Yih-Lang, additional, Kravets, Victor N., additional, and Nam, Gi-Joon, additional

Published
2018
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145. Color-Changing Soft Actuators: Biomimetic Color Changing Anisotropic Soft Actuators with Integrated Metal Nanowire Percolation Network Transparent Heaters for Soft Robotics (Adv. Funct. Mater. 32/2018)

Author

Kim, Hyeonseok, primary, Lee, Habeom, additional, Ha, Inho, additional, Jung, Jinwook, additional, Won, Phillip, additional, Cho, Hyunmin, additional, Yeo, Junyeob, additional, Hong, Sukjoon, additional, Han, Seungyong, additional, Kwon, Jinhyeong, additional, Cho, Kyu-Jin, additional, and Ko, Seung Hwan, additional

Published
2018
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148. Copper Nanowires: A Transparent and Flexible Capacitive-Force Touch Pad from High-Aspect-Ratio Copper Nanowires with Enhanced Oxidation Resistance for Applications in Wearable Electronics (Small Methods 7/2018)

Author

Kim, Dongkwan, primary, Kwon, Jinhyeong, additional, Jung, Jinwook, additional, Kim, Kyunkyu, additional, Lee, Habeom, additional, Yeo, Junyeob, additional, Hong, Sukjoon, additional, Han, Seungyong, additional, and Ko, Seung Hwan, additional

Published
2018
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149. Biomimetic Color Changing Anisotropic Soft Actuators with Integrated Metal Nanowire Percolation Network Transparent Heaters for Soft Robotics

Author

Kim, Hyeonseok, primary, Lee, Habeom, additional, Ha, Inho, additional, Jung, Jinwook, additional, Won, Phillip, additional, Cho, Hyunmin, additional, Yeo, Junyeob, additional, Hong, Sukjoon, additional, Han, Seungyong, additional, Kwon, Jinhyeong, additional, Cho, Kyu‐Jin, additional, and Ko, Seung Hwan, additional

Published
2018
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