Gun Young Jung

ORCID: 0000-0003-1163-8651
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About
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Research Areas
  • Nanofabrication and Lithography Techniques
  • ZnO doping and properties
  • Nanowire Synthesis and Applications
  • GaN-based semiconductor devices and materials
  • Gas Sensing Nanomaterials and Sensors
  • Conducting polymers and applications
  • Perovskite Materials and Applications
  • Advanced Memory and Neural Computing
  • Advancements in Photolithography Techniques
  • Organic Electronics and Photovoltaics
  • Microfluidic and Capillary Electrophoresis Applications
  • Analytical Chemistry and Sensors
  • Graphene research and applications
  • Advanced Photocatalysis Techniques
  • Semiconductor materials and devices
  • Ga2O3 and related materials
  • Quantum Dots Synthesis And Properties
  • Molecular Junctions and Nanostructures
  • Nanomaterials and Printing Technologies
  • Organic Light-Emitting Diodes Research
  • TiO2 Photocatalysis and Solar Cells
  • Photonic Crystals and Applications
  • Neuroscience and Neural Engineering
  • Advanced Sensor and Energy Harvesting Materials
  • Advanced biosensing and bioanalysis techniques

Gwangju Institute of Science and Technology
2015-2025

Incheon St. Mary's Hospital
2022

Government of the Republic of Korea
2017-2020

Sungkyunkwan University
2016-2020

King Abdullah University of Science and Technology
2018-2020

Gwangju University
2017-2020

Taif University
2020

Kyung Hee University
2013-2014

Pukyong National University
2014

Jeonbuk National University
2012-2013

Molecular electronics offer an alternative pathway to construct nanoscale circuits in which the critical dimension is naturally associated with molecular sizes. We describe fabrication and testing of molecular-electronic that comprise a monolayer [2]rotaxanes sandwiched between metal nanowires form 8 × crossbar within 1 µm2 area. The resistance at each cross point can be switched reversibly. By using as active memory cell, were operated rewritable, nonvolatile density 6.4 Gbits cm−2. setting...

10.1088/0957-4484/14/4/311 article EN Nanotechnology 2003-03-20

Osteoarthritis (OA) is a chronic degenerative disease of articular cartilage that the most common joint worldwide. Mesenchymal stem cells (MSCs) have been extensively explored for treatment OA. Recently, it has demonstrated MSC-derived extracellular vesicles (EVs) may contribute to potential mechanisms MSC-based therapies. In this study, we investigated therapeutic human adipose-derived EVs (hASC-EVs) in alleviating OA, along with mechanism. were isolated from culture supernatants hASCs by...

10.1080/20013078.2020.1735249 article EN cc-by-nc Journal of Extracellular Vesicles 2020-03-09

The explosive demand for a wide range of data processing has sparked interest towards new logic gate platform as the existing electronic gates face limitations in accurate and fast computing. Accordingly, optoelectronic (OELGs) using photodiodes are significant due to their broad bandwidth transmission, but complex configuration, power consumption, low reliability issues still inherent these systems. Herein, we present novel all-in-one OELG based on bipolar spectral photoresponse...

10.1038/s41467-022-28374-w article EN cc-by Nature Communications 2022-02-07

One diode–one resistor (1D–1R) hybrid-type devices consisting of an inorganic Schottky diode and organic unipolar memory show electrically rewritable switching characteristics as well rectifying properties. The 1D–1R array architecture improves the sensing efficiency cell, ultimately creating possibility for high-density integrated without restrictions due to cross-talk between cells.

10.1002/adma.200903203 article EN Advanced Materials 2009-12-14

High density metal cross bars at 17 nm half-pitch were fabricated by nanoimprint lithography. Utilizing the superlattice nanowire pattern transfer technique, a 300-layer GaAs/AlGaAs was employed to produce an array of 150 Si nanowires (15 wide 34 pitch) as imprinting mold. A successful reproduction demonstrated. Furthermore, cross-bar platinum with cell approximately 100 Gbit/cm2 two consecutive processes.

10.1021/nl052110f article EN Nano Letters 2006-02-04

This paper describes the resistive switching of a cross-point cell array device, with junction area 100 nm x nm, fabricated using ultraviolet nanoimprinting. A GdO(x) and Cu-doped MoO(x) stack platinum top bottom electrodes served as layer, which shows analog memory characteristics resistance ratio greater than 10. To demonstrate neural network circuit, we operated device an electrically modifiable synapse circuit carried out weighted sum operation. demonstration arrays, based on memory,...

10.1088/0957-4484/20/34/345201 article EN Nanotechnology 2009-08-04

We report the fabrication of three-dimensional (3D) branched nanowire (NW) heterostructures, consisting periodically ordered vertical Si NW trunks and ZnO branches, their application for solar water splitting. The photoelectrodes show orders magnitudes higher photocurrent compared to bare electrodes. More interestingly, selective photoelectrochemical cathodic or anodic behavior resulting in either oxidation reduction was achieved by tuning doping concentration p-type core. Specifically,...

10.1021/nl304539x article EN Nano Letters 2013-05-28

Fully stretched DNA molecules are becoming a fundamental component of new systems for comprehensive genome analysis. Among number approaches elongating molecules, nanofluidic molecular confinement has received enormous attentions from physical and biological communities the last several years. Here we demonstrate well-optimized condition that molecule can stretch almost to its full contour length: average is 19.1 µm ± 1.1 YOYO-1 stained λ (21.8 length) in 250 nm × 400 channel, which longest...

10.1039/c0lc00680g article EN Lab on a Chip 2011-01-01

We report the systematic study of 3D ZnO/Si branched nanowire (b-NW) photoelectrodes and their application in solar water splitting. focus our on correlation between electrode design structures (including Si NW doping, dimension trunk branch ZnO NWs, b-NW pitch size) photoelectrochemical (PEC) performances (efficiency stability) under neutral conditions. Specifically, we show that for electrodes with lightly doped p-Si core, larger branches longer cores give a higher photocathodic current,...

10.1021/nn404170y article EN ACS Nano 2013-09-10

Polymer residue-free graphene nanoribbons (GNRs) of 200 nm width at 1 μm pitch were periodically generated in an area cm2 via laser interference lithography using a chromium interlayer prior to photoresist coating. High-quality GNRs evidenced by atomic force microscopy, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy measurements. Palladium nanoparticles then deposited on the as catalysts for sensing hydrogen gases, GNR array was utilized electrically conductive path with less...

10.1021/am503105s article EN ACS Applied Materials & Interfaces 2014-07-22

Recently, many kinds of printing processes have been studied to fabricate perovskite solar cells (PeSCs) for mass production. Among them, slot-die coating is a promising candidate roll-to-roll processing because high-throughput, easy module patterning, and premetered system. In this work, we employed mixed lead precursors consisting PbAc2 PbCl2 PeSCs via coating. We observed that slot-die-coated films based on the exhibited well-grown uniform morphology, which was hard achieve by using only...

10.1021/acsami.8b02549 article EN ACS Applied Materials & Interfaces 2018-04-18

The production of hydrogen peroxide (H2O2) using photocatalytic nanoparticles is an emerging field with applications in organic synthesis, biosensors, and fuel cells. Colloidal photocatalysts are, however, limited their because poor efficiency stability. In this study, millimolar H2O2 was achieved within 5 min solid-phase photocatalysts—Au nanoislands (NIs) on porous TiO2 films—without supplying O2 or stirring the solution. Au/TiO2 showed almost 80-fold greater productivity than TiO2, which...

10.1021/acscatal.9b02269 article EN ACS Catalysis 2019-09-03

Abstract Perovskite quantum dot (QD) light‐emitting diodes (PeLEDs) are ideal for next‐generation display applications because of their excellent color purity, high efficiency, and cost‐effective fabrication. However, developing a technology high‐resolution multicolor patterning perovskite QDs remains challenging, owing to the chemical instability these materials. To overcome issues, in this work, generation surface defects is prevented by controlling ligand‐binding kinetics using stable...

10.1002/adma.202007855 article EN Advanced Materials 2021-05-03

Abstract Selective spectral discrimination of visible and near‐infrared light, which accurately distinguishes different light wavelengths, holds considerable promise in various fields, such as automobiles, defense, environmental monitoring. However, conventional imaging technologies suffer from issues, including insufficient spatial optimization, low definition, optical loss. Herein, a groundbreaking advancement is demonstrated the form dual‐band photodiode with distinct near‐infrared‐...

10.1002/advs.202308840 article EN Advanced Science 2024-03-09

In this paper, we focus on the synthesis and structure of new bis(1,3,4-oxadiazole) system 2,5-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]pyridine (PDPyDP). We have fabricated light-emitting diodes (LEDs) using poly[2-methoxy-5-(2-ethylhexoxy)-1,4-phenylene vinylene] (MEH−PPV) as emissive material, with without a thermally evaporated electron-injection/hole-blocking layer either PDPyDP or its vinylene analogue (E)-1,2-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]ethene (PDVDP)...

10.1021/cm0010250 article EN Chemistry of Materials 2001-03-23

Abstract Position‐configurable, vertical, single‐crystalline ZnO nanorod arrays are fabricated via a polymer‐templated hydrothermal growth method at low temperature of 93 °C. A sol‐gel processed dense c ‐oriented seed layer film is employed to grow nanorods along the ‐axis direction [0001] regardless any substrate crystal mismatches. Here, one‐beam laser‐interference lithography utilized fabricate nanoscale holes over an entire 2‐in. wafer during preparation polymer template. As such,...

10.1002/adfm.201000613 article EN Advanced Functional Materials 2010-07-13

A periodically aligned submicron ZnO hemispheres array was embedded into a TiO2 nanoparticulate thin film (thickness; ca. 12 μm) as photoanode for dye-sensitized solar cells (DSSCs). The hemisphere provided light scattering centers that excited more dyes and direct electron pathways to the electrodes, which is beneficial high efficiency DSSCs. Detailed facts of importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset....

10.1002/adma.201103985 article EN Advanced Materials 2012-01-03

By combining nanoimprint lithography technique and a two-step lift-off process, Si nanotube array is fabricated applied as light absorber for n-Si/PEDOT:PSS hybrid solar cells. The effectively trapped within the nanotubes device reveals Jsc of 29.9 mA·cm−2 power conversion efficiency 10.03%, which an enhancement 13.4% compared to cell having best-known architecture nanocones date.

10.1002/adma.201305394 article EN Advanced Materials 2014-02-18

One-dimensional (1-D) SnO2 nanorods (NRs) with a rutile structure are grown on various substrates regardless of the lattice-mismatch by using new nutrient solution based tin oxalate, which generated supersaturated Sn2+ sources. These affluent sources appropriate for producing large number nanoparticles, sufficient stacking substrate surface gravity, then acts as seed layer subsequent nanorod growth. Single crystalline along [001] direction oriented attachment phenomenon in attached...

10.1039/c2nr33114d article EN Nanoscale 2013-01-01

A periodically aligned Pt nanocup array is employed as a counter electrode in dye-sensitized solar cells (DSSCs). The enhances the catalytic area, which results greater fill factor (FF) and higher short-circuit current (Jsc). density of nanocups preferable for performance DSSCs.

10.1002/smll.201201214 article EN Small 2012-09-13

A novel cell-based biosensing platform is developed using a combination of sequential laser interference lithography and electrochemical deposition methods. This enables the sensitive discrimination dopaminergic cells from other types neural in completely nondestructive manner. detection strategy may become an effective noninvasive situ monitoring tool that can be used to determine stem cell fate for various regenerative applications. As service our authors readers, this journal provides...

10.1002/adma.201502489 article EN Advanced Materials 2015-09-21
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