Professor Ryu's Research Group
Nano-photonics Laboratory
2021
1. Flexible Self-Powered Piezoelectric Pressure Sensor Based on GaN/p-GaN Coaxial Nanowires, A Waseem, MA Johar, MA Hassan, IV Bagal, A Abdullah, SW Ryu*, J. Alloys Compd., 2021.
2. CF4 Plasma-treated Porous Silicon Nanowire Arrays Laminated with MnO2 Nanoflakes for Asymmetric Pseudocapacitors, IV Bagal, NR Chodankar, A Waseem, MA Johar, SJ Patil, A Abdullah, MA Hassan, YK Han, SW Ryu*, Chem. Eng. J,2021.
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3. Room temperature quantum key distribution characteristics of low-noise InGaAs/InP single-photon avalanche diode, SH Baek, SC Yang, CY Park, CW Park, SB Cho, SW Ryu*, J. Korean Phys. Soc., 2021.
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4. GaN/Al2O3 core-shell nanowire based flexible and stable piezoelectric energy harvester, A Waseem, MA Johar, MA Hassan, IV Bagal, JS Ha, JK Lee, SW Ryu*, J. Alloys Compd., 158545, 2020
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5. GaN Nanowire Growth Promoted by In–Ga–Au Alloy Catalyst with Emphasis on Agglomeration Temperature and In Composition, A Waseem, MA Johar, MA Hassan, IV Bagal, A Abdullah, JS Ha, JK Lee, SW Ryu*,ACS omega, 2021.
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6. Flexible, polymer-supported, ZnO nanorod array photoelectrodes for PEC water splitting applications, TF Hou, A Shanmugasundaram, IV Bagal, SW Ryu, DW Lee, Mater Sci Semicond Process, 121., 105445, 2021.
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7. Synergic effect of ZnO nanostructures and cobalt phosphate co-catalyst on photoelectrochemical properties of GaN, SS Patil, MA Johar, MA Hassan, A Waseem, IV Bagal, DE Shinde, SW Ryu*, Mater. Chem. Phys., 260.124141, 2021.
8.Stabilizing nanocrystalline Cu2O with ZnO/rGO: Engineered photoelectrodes enables efficient water splitting, A Shanmugasundaram, MA Johar, R Boppella, DS Kim, YJ Jeong, JY Kim, MA Hassan, SW Ryu, DW Lee, Ceram. Int., 2021.
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2020
1. Highly Durable Piezoelectric Nanogenerator by Heteroepitaxy of GaN Nanowires on Cu Foil for Enhanced Output Using Ambient Actuation Sources, MA Johar, A Waseem, MA Hassan, IV Bagal, A Abdullah, JS Ha, SW Ryu*, Adv. Ener. Mater. 10, 2002608, 2020.
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2. Epitaxial Growth of GaN Core and InGaN/GaN Multiple Quantum Well Core/Shell Nanowires on a Thermally Conductive Beryllium Oxide Substrate, MA Johar, A Waseem, MA Hassan, IV Bagal, A Abdullah, JS Ha, JK Lee, SW Ryu*, ACS Omega 5, 17753, 2020.
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3. RGB arrays for micro-LED applications using nanoporous GaN embedded with quantum dots, JH Kang, B Li, T Zhao, MA Johar, CC Lin, YHs Fang, WH Kuo, KL Liang, S H, SW Ryu, J Han, ACS Appl. Mater. Inter. 12, 30980, 2020.
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4. Three-Dimensional Integration of CuO-Si Hierarchical Nanowires for Electrochemical Detection of N2H4, IV Bagal, A Ejaz, A Waseem, MA Johar, M A Hassan, JH Han, SW Ryu*, ACS Appl. Nano. Mater. 3, 4394, 2020.
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5. Growth of a-axial GaN core nanowires, semi-polar (1-101) GaN/InGaN multiple quantum well co-axial nanowires on Si substrate, and their carrier dynamics, MA Johar, A Waseem, HG Song, M A Hassan, I V Bagal, YH Cho, SW Ryu*, Opt. Mater. 105,109854, 2020.
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6. Single-step fabrication of 3D hierarchical ZnO/ZnS heterojunction branched nanowires by MOCVD for enhanced photoelectrochemical water splitting, MA Hassan, A Waseem, MA Johar, IV Bagal, JS Ha, SW Ryu*, J. Mater. Chem. A 8, 8300, 2020.
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7. Cu2O Heterostructured GaN Thin Film and GaN Nanowire Piezoelectric Nanogenerators, A Waseem, MA Johar, MA Hassan, IV Bagal, JS Ha, JK Lee, SW Ryu*, Phys. Status Solidi A 217, 1900798, 2020.
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8. Vertically aligned one-dimensional ZnO/V2O5 core–shell hetero-nanostructure for photoelectrochemical water splitting, TF Hou, MA Johar, R Boppella, MA Hassan, SJ Patil, SW Ryu, DW Lee, Journal of Energy Chemistry 49, 262, 2020.
9. Three-dimensional hierarchical semi-polar GaN/InGaN MQW coaxial nanowires on a patterned Si nanowire template, MA Johar, T Kim, HG Song, A Waseem, JH Kang, MA Hassan, IV Bagal, YH Cho, SW Ryu*, Nanoscale Advances 2, 1654, 2020.
10. Pd-Ni nanoalloy decorated carbon nanotubes based efficient and stable silicon photocathode for acidic water splitting, H Bae, V Burungale, JB Park, SW Bang, SH Kang, SW Ryu, JS Ha, Appl Surf. Sci. 510, 145389, 2020.
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11. Transparent carbon nanotube web structures with Ni-Pd nanoparticles for electromagnetic interference (EMI) shielding of advanced display devices, J Park, H Rho, AN Cha, H Bae, SH Lee, SW Ryu, JS Ha, Appl Surf. Sci. 516, 145745 (2020).
12. Universal and scalable route to fabricate GaN nanowire-based LED on amorphous substrate by MOCVD, MAJohar HG Song, A Waseem, MA Hassan, IV Bagal, YH Cho, SW Ryu*, Appl. Mater. Today 19, 100541, 2020.
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13. Optical characterization of type-II ZnO/ZnS multiple quantum wells grown by atomic layer deposition, MA Hassan, A Waseem, MA Johar, SY Yu, JK Lee, JS Ha, SW Ryu*, Thin Solid Films 694, 137740, 2020.
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14. Enhanced stability of piezoelectric nanogenerator based on GaN/V2O5 core-shell NWs with capacitive contact, A Waseem, MA Johar, MA Hassan, I Bagal, JS Ha, June Key Lee, SW Ryu*, Nanotechnology 31, 075401, 2020.
2019
1. Enhanced photoelectrocatalytic water oxidation using CoPi modified GaN/MWCNTs composite photoanodes, SS Patil, MA Johar, MA Hassan, DR Patil, SW Ryu*, Sol Energy 178, 125, 2019.
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2. Photoelectrochemical Characterization of p-type InAlP on GaAs for Solar Water Splitting Application, MA Hassan, JH Kang, SS Patil, MA Johar, SW Ryu*, SI Park, J Song, J. Kor. Phys. Soc. 74, 116, 2019.
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3. Highly Stable Bulk GaN Photoanode Grown by Hydride Vapor-Phase Epitaxy for Photoelectrochemical Water Splitting, H Bae, H Kim, JW Ju, DW Jeon, SW Ryu, Y Moon, JS Ha, J. Electrochem. Soc. 166, H103, 2019.
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4. Type-II ZnO/ZnS core-shell nanowires: Earth abundant photoanode for solar-driven photoelectrochemical water splitting, MA Hassan, MA Johar, A Waseem, IVBagal, JS Ha, SW Ryu*, Opt. Exp. 27, A184, 2019.
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5. Enhanced photoelectrochemical stability of GaN photoelectrodes by Al2O3 surface passivation layer, H Kim, H Bae, SW Bang, S Kim, SH Lee, SW Ryu, JS Ha, Opt. Exp. 27, A206, 2019.
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6. Hybrid material passivation approach to stabilize the silicon nanowires in aqueous electrolyte for high-energy efficient supercapacitor, NR Chodankar, IV Bagal, SW Ryu*, DHKim, Chem. Eng. J. 362, 609, 2019.
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7. Effect of crystal orientation of GaN/V2O5 core-shell nanowires on piezoelectric nanogenerators, A Waseem, MA Johar, MA Hassan, IV Bagal, JS Ha, JK Lee, SW Ryu*, Nano Energy 60, 413, 2019.
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8. Highly conversion efficiency of solar water splitting over p-Cu2O/ZnO photocatalyst grown on a metallic substrate, WZ Tawfik, MA Hassan, MA Johar, SW Ryu, JK Lee, J. Catal. 374, 276, 2019.
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9. Ultrafast carrier dynamics of conformally grown semi-polar (11-22) GaN/InGaN multiple quantum well co-axial nanowires on m-axial GaN core nanowires, MA Johar, HG Song, A Waseem, JH Kang, JS Ha, YH Cho, SW Ryu*, Nanoscale 11, 10932, 2019.
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10. ZnO/Cu2O-decorated rGO: Heterojunction photoelectrode with improved solar water splitting performance”, TF Hou, A Shanmugasundaram, MA Hassan, MA Johar, SW Ryu, DW Lee, Int. J. Hydrogen Energy, 44, 19177, 2019.
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11. Cu2O as an emerging photocathode for solar water splitting - A status review, IVBagal, NR Chodankar, MA Hassan, A Waseem, MA Johar, DH Kim, SW Ryu*, Int. J. Hydrogen Energy 44, 21351, 2019.
12. Transferred monolayer MoS2 onto GaN for heterostructure photoanode: Toward stable and efficient photoelectrochemical water splitting, MA Hassan, MW Kim, MA Johar, A Waseem, MK Kwon, SW Ryu*, Sci. Rep. 9,20141, 2019.
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13. Cathodoluminescence of a 2 inch ultraviolet-light-source tube based on the integration of AlGaN materials and carbon nanotube field emitters, WZ Tawfik, CM Manoj Kumar, J Park, SK Shim, H Lee, JLee, JH Han, SW Ryu, NLee, JK Lee, Journal of Materials Chemistry C 7, 11540, 2019.
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14. Nano-Micro-Structured Nickel-Cobalt Hydroxide/Ni2P2O7 Assembly on Nickel Foam: An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction, NR Chodankar, IV Bagal, SW Ryu, YK Han, DH Kim, ChemCatChem 11, 4256, 2019.
2018
1.High-performance ZnS/GaN heterostructure photoanode for photoelectrochemical water splitting applications, MA Hassan, JH Kang, MA Johar, JS Ha, SW Ryu*, Acta Materialia 146, 171, 2018.
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2. Efficient Electrochemical Potentiostatic Activation Method for GaN-Based Green Vertical-LEDs, WZ Tawfik, SO Cho, JS Ha, SW Ryu, DJ Cai, JK Lee, ECS J. Solid State Sci. Technol. 7, Q47, 2018.
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3. Enhanced performance of GaN-based LEDs via electroplating of a patterned copper layer
on the backside, WZ Tawfik, GY Hyun, SJ Lee, SW Ryu, JS Ha, JK Lee, J. Mater. Sci. 53, 8878, 2018.
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4. A scalable, flexible and transparent GaN based heterojunction piezoelectric nanogenerator for bending, air-flow and vibration energy harvesting, MA Johar, JH Kang, MA Hassan, SW Ryu*, Appl. Energy 222, 781, 2018.
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5. Enhanced piezoelectric output of NiO/nanoporous GaN by suppression of internal carrier screening, A. Waseem, DK Jeong, MA Johar, JH Kang, JS Ha, JK Lee, SW Ryu*, Semicon. Sci. Technol. 33, 065007, 2018.
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6. Solvent Additive-Assisted Anisotropic Assembly and Enhanced Charge Transport of π‑Conjugated Polymer Thin Films, JW Jeong, G Jo, S Choi, YA Kim, H Yoon, SW Ryu, J Jung, Mincheol Chang, ACS Appl. Mater. Inter. 10, 18131, 2018.
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7. Stable and High Piezoelectric Output of GaN Nanowire-Based Lead-Free Piezoelectric Nanogenerator by Suppression of Internal Screening, MA Johar, MA Hassan, A Waseem, JS Ha, JK Lee, SW Ryu*, Nanomaterials 8, 437, 2018.
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8. Anchoring MWCNTs to 3D honeycomb ZnO/GaN heterostructures to enhancing photoelectrochemical water oxidation, SS Patil, MA Johar, MA Hassan, DR Patil, SW Ryu*, Appl. Catal. B Environ. 237, 791, 2018.
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9. Facile morphology control of high aspect ratio patterned Si nanowires by metal-assisted chemical etching, IVBagal, MA Johar, MA Hassan, A Waseem, SW Ryu*, J. Mater. Sci. Mater. Electron. 29, 18167, 2018.
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10. Optical and Structural Analysis of Zinc Oxysulfide Digital Alloys Grown by Atomic Layer Deposition SY Yu, MA Hassan, MA Johar, SW Ryu*, J. Kor. Phys. Soc. 73, 649, 2018.
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11. Research on Fabrication of Silicon Lens for Optical Communication by Photolithography Process, J Park, D Lee, H Rho, S Kim, J Heo, SW Ryu, SJ Kang, JS Ha, J. Microelectron. Packag. Soc. 25, 35, 2018.
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12. Facile growth of high aspect ratio c-axis GaN nanowires and their application as flexible p-n NiO/GaN piezoelectric nanogenerators, MA Johar, A Waseem, MA Hassan, JH Kang, JS Ha, JK Lee, SW Ryu*, Acta Materialia 161, 237, 2018.
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13. Facile Synthesis of Well-Aligned ZnO Nanowires on Various Substrates by MOCVD for Enhanced Photoelectrochemical Water-Splitting Performance, MA Hassan, MA Johar, SY Yu, SW Ryu*, ACS Sustain. Chem. Eng. 6, 16047, 2018.
2017
1. Low-Cost CWDM Transceiver Module by Spatial Power Combination and Division for Multimode Fiber Links, HKim, I Kim, HS Lee, JB Yoon, HK Shin, SW Ryu*, IEEE Photon. Technol. Lett. 29, p. 39, 2017.
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2. Controlled synthesis of GaN-based nanowires for photoelectrochemical water splitting applications, M Ebaid, JH Kang, SW Ryu*, Semicon. Sci. Technol. 32, 013001, 2017.
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3. Enhanced performance of a GaN piezoelectric nanogenerator with an embedded nanoporous layer via the suppressed carrier screening effect, JH Kang, DK Jeong, JS Ha, JK Lee, SW Ryu*, Semicon. Sci. Technol. 32, 025001, 2017.
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4. Improvement in homogeneity and binning yield of color coordinate by a conformal phosphor sheet technique in white flip-chip LEDs, SH Park, SH Lee, YH Kim, YW Kim, SW Ryu*, Semicon. Sci. Technol. 32, 035022, 2017.
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5. The Effect of the number of InGaN/GaN pairs on the photoelectrochemical properties of InGaN/GaN multi quantum wells, H Bae, JB Park, K Fujii, HJ Lee, SH Lee, SW Ryu, JKLee, JS Ha, Appl. Surf. Sci. 401, 348-352, 2017.
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6. Transparent, Flexible Piezoelectric Nanogenerator Based on GaN Membrane Using Electrochemical Lift-Off, JH Kang, DK Jeong, SW Ryu*, ACS Appl. Mater. Inter. 9, 10637-10642, 2017.
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7. Design of Silicon Plano Convex Lens for Optimized Light Coupling Between Laser Diodes and Single Mode Optical Fiber, IY Hwang, J Park, JS Ha, SW Ryu*, Korean J. Met. Mater. 55, 274-283, 2017.
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8. Controlled conductivity of p-type CuxO/GaN piezoelectric generator to harvest very high piezoelectric potential, MA Johar, JH Kang, JS Ha, JK Lee, SW Ryu*, J. Alloy Compd. 726, 765-771, 2017.
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9. One-Pot in Situ Hydrothermal Growth of BiVO4/Ag/rGO Hybrid Architectures for Solar Water Splitting and Environmental Remediation, SS Patil, MG Mali, MA Hassan, DR Patil, SS Kolekar, SW Ryu*, Sci. Rep. 7, 8404, 2017.
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10. Enhanced piezoelectric operation of NiO/GaN heterojunction generator by suppressed internal carrier screening, DK Jeong, JH Kang, JS Ha, SW Ryu*, J. Phys. D: Appl. Phys. 50, 425101, 2017.
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11. Design of a Silicon Fresnel Lens for Optimized Light Coupling in a Transmitter Optical Subassembly, IY Hwang, JS Ha, SW Ryu*, Korean J. Met. Mater. 55, 813, 2017.
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12. Facile growth of density- and diameter-controlled GaN nanobridges and their photodetector application, J Kang, MA Johar, B Alshehri, E Dogheche SW Ryu*, J. Mater. Chem. C 5, 11879, 2017.
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13. Controlled carrier screening in p-n NiO/GaN piezoelectric generators by an Al2O3 insertion layer, MA Johar, DK Jeong, MA Hassan, JH Kang, JS Ha, JK Lee, SW Ryu*, J. Phys. D: Appl. Phys. 50, 485501, 2017.
2016
1. Improved Reliability of InGaN-Based Light-Emitting Diodes by HfO2 Passivation Layer, SH Park, YS Kim, Tae Hoon Kim, SW Ryu*, J. Nanosci. Nanotech. 16, 1765-1767, 2016.
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2. Piezoelectric field in highly stressed GaN-based LED on Si (111) substrate, WZ Tawfik, GY Hyun, SW Ryu, JS Ha, JK Lee, Optical Materials 55, p. 17, 2016.
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3. Direct growth of nano-crystalline graphite films using pulsed laser deposition with in-situ monitoring based on reflection high-energy electron diffraction technique, JH Kwak, SS Lee, HJ Lee, G Anoop, HJ Lee, WS Kim, SW Ryu, HS Kim, JY Jo, Appl. Phys. Lett. 108, p. 123107, 2016.
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4. Efficient energy harvesting of a GaN p–n junction piezoelectric generator through suppressed internal field screening, JH Kang, M Ebaid, DK Jeong, JK Lee, SW Ryu*, J. Mater. Chem. C 4, p. 3337, 2016.
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5. Parallel Aligned Mesopore Arrays in Pyramidal-Shaped Gallium Nitride and Their Photocatalytic Applications, HJ Kim, J Park, BU Ye, CJ Yoo, JL Lee, SW Ryu, H Lee, KJ Choi, JM Baik, ACS Appl. Mater. Inter. 8, p. 18201-18207, 2016.
6. Optical Characteristics of Wet-Thermally Oxidized Bulk and Nanoporous GaN, S Kim, M Kadam, JH Kang, SW Ryu*, Electron. Mater. Lett. 12, p. 596, 2016.
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7. Fabrication of High Reflectivity Nanoporous Distributed Bragg Reflectors by Controlled Electrochemical Etching of GaN, SM Lee, JH Kang, JK Lee, SW Ryu*, Electron. Mater. Lett. 12, p. 673, 2016.
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8. Optical Characteristics of Single-Crystal InGaN Nanowires Grown via Metal-Organic Chemical Vapor Deposition with a Ni Catalyst, SY Kwon, SK Moon, C Lee, M Ebaid, JH Kang, SW Ryu, JK Yang, J. Nanosci. Nanotech. 16, p. 12967, 2016.
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9. Influence of Mg Flux on the Photoelectrochemical Properties of p-Type GaN for Hydrogen Production, H Bae, E Kim, JB Park, K Fujii, S Lee, HJ Lee, SW Ryu, JK Lee, JS Ha, J. Nanosci. Nanotech. 16, p. 10635, 2016.
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10. Fabrication of Colloidal InGaN/GaN Quantum Dots from Epitaxially Grown Quantum Wells, JH Kang, M Ebaid, J Lee, SW Ryu*, Nanosci. Nanotech. Lett. 8, p. 760, 2016.
2015
1. A 1´8 Splitter Chip with Integrated Fiber Grooves for Reliable Passive Alignment of Fiber Arrays, JK Oh, JH Cho, SW Ryu, HJ Lee, IEEE Photon. Technol. Lett. 27, p. 249-252, 2015.
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2.Enhanced solar hydrogen generation of high density, high aspect ratio, coaxial InGaN/GaN multi-quantum well nanowires, M Ebaid, JH Kang, SH Lim, JS Ha, JK Lee, YH Cho, SW Ryu* , Nano Energy 12, p. 215, 2015.
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3. Controllable Synthesis of Vapor-Liquid-Solid Grown GaN Nanowires for Photoelectrochemical Water Splitting Applications, M Ebaid, JH Kang, SW Ryu*, J. Electrochem. Soc. 162, p. H264, 2015.
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4. Towards highly efficient photoanodes: The role of carrier dynamics on the photoelectrochemical performance of InGaN/GaN multiple quantum well coaxial nanowires, M Ebaid, JH Kang, SH Lim, YH Cho, SW Ryu*, RSC Adv. 5, p. 23303, 2015.
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5. Effect of Sapphire Substrate Thickness on the Characteristics of 450 nm InGaN/GaN Multi-Quantum Well Light-Emitting Diodes, WZ Tawfik, SJ Bae, SB Yang, SW Ryu, JK Lee, J. Nanosci. Nanotech. 15, p. 5140, 2015.
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6. Optically pumped GaN vertical cavity surface emitting laser with high index-contrast nanoporous distributed Bragg reflector, SM Lee, SH Gong, JH Kang, M Ebaid, SW Ryu, YH Cho, Optics Express 23, p. 11023-11030, 2015.
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7. Chemical synthesis of porous web-structured CdS thin films for photosensor applications, SR Gosavi, CP Nikam, AR Shelke, AM Patil, SW Ryu, JS Bhat, N.G. Deshpande, Mater. Chem. Phys. 160, p. 244-250, 2015.
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8. Electrochemical removal of hydrogen atoms in Mg-doped GaN epitaxial layers, JK Lee, GY Hyeon, WZ Tawfik, HS Choi, SW Ryu, T Jeong, E Jung, H Kim, J. Appl. Phys. 117, p. 185702, 2015.
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9. Optical study of phase-separated thick InGaN layers grown on a compliant substrate, JH Kang, M Ebaid, JK Lee, SW Ryu*, Appl. Phys. A 121, p. 765-771, 2015.
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10. Vertically aligned InGaN nanowires with engineered axial In composition for highly efficient visible light emission, M Ebaid, JH Kang, YS Yoo, SH Lim, YH Cho, SW Ryu*, Scientific Reports 5, p. 17003, 2015.
2014
1. Ultrashort carrier lifetime of vapor–liquid–solid-grown GaN/InGaN multi-quantum-well coaxial nanorods, M Ebaid, JH Kang, SH Lim, SM Ko, YH Cho, SW Ryu*, Acta Materialia 65, p. 118, 2014.
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2. Nano-Scale SiO2 Patterned n-Type GaN Substrate for 380 nm Ultra Violet Light Emitting Diodes, MS Jo, HW Seo, WZ Tawfik, SB Yang, JJ Lee, SW Ryu, JS Ha, SR Jeon, H Cui, SH Park, JK Lee, J. Nanosci. Nanotech. 14, p. 6108, 2014.
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3. Improved efficiency and stability of GaN photoanode in photoelectrochemical water splitting by NiO cocatalyst, SH Kim, M Ebaid, JH Kang, SW Ryu*, Appl. Surf. Sci. 305, p. 638, 2014.
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4. Enhanced Water Splitting Stability with Controlled NiO Co-Catalyst on GaN Photoanode, SH Kim, JH Kang, and SW Ryu*, J. Nanosci. Nanotech. 14, p. 7903, 2014.
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5. Fabrication of Vertical Light Emitting Diode Based on Thermal Deformation of Nanoporous GaN and Removable Mechanical Supporter, JH Kang, M Ebaid, JK Lee, T Jeong, SW Ryu*, ACS Appl. Mater. Inter. 6, p.8683, 2014.
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6. Optical waveguiding properties into porous gallium nitride structures investigated by prism coupling technique, B Alshehri, SM Lee, JH Kang, SH Gong, SW Ryu, YH Cho, E Dogheche, Appl. Phys. Lett. 94, p. 221907, 2014.
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7. Efficient photoelectrochemical water splitting by a doping-controlled GaN photoanode coated with NiO cocatalyst, JH Kang, SH Kim, M Ebaid, JK Lee, SW Ryu*, Acta Materialia 79, p. 188, 2014.
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8. Effect of residual compressive stress on near-ultraviolet InGaN/GaN multi-quantum well light-emitting diodes, WZ Tawfik, SJ Bae, SW Ryu, T Jeong, JK Lee, Optical Materials 38, p. 131, 2014.
2013
1. Improvement in Crystal Quality and Optical Properties of n-Type GaN Employing Nano-Scale SiO2 Patterned n-Type GaN Substrate, MS Jo, KG Sadasivam, WZ Tawfik, SB Yang, JJ Lee, JS Ha, YB Moon, SW Ryu, JK Lee, J. Nanosci. Nanotech. 13, p. 545, 2013.
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2. Self Assembled Growth of GaSb Nano Triangles on GaN/Sapphire Substrate, SH Moon, J Park, JK Lee, SW Ryu*, J. Nanosci. Nanotech. 13, p. 1943, 2013.
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3. Effect of Silicon Doping on GaN Nanorods during Vapor–Liquid–Solid Growth”, M Ebaid, JH Kang, JK Lee, SW Ryu*, Jap. J. Appl. Phys. 52, p. 08JE08, 2013.
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4. High Diffuse Reflectivity of Nanoporous GaN Distributed Bragg Reflector Formed by Electrochemical Etching, J Park, JH Kang, SW Ryu*, Appl. Phys. Express 6, 072201, 2013.
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5. Enhanced photocurrent and persistent photoconductivity in nanoporous GaN formed by electrochemical etching, YH Lee, JH Kang, SW Ryu*, Thin Solid Films 540, 150, 2013.
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6. Surface Passivation of High Density InGaN/GaN Nanorods Fabricated by Reactive Ion Etching, YM Song, SH Kim, JH Kang, J Park, SR Jeon, SW Ryu*, J. Nanosci. Nanotech. 13, p. 7177, 2013.
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7. Electrochemical potentiostatic activation for improvement of internal quantum efficiency of 385-nm ultraviolet light-emitting diodes, HS Choi, HJ Kim, JJ Lee, HW Seo, WZ Tawfik, JS Ha, SW Ryu, SR Jun, T Jeong, JK Lee, Appl. Suf. Sci. 283, p. 521, 2013.
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8. Effect of external tensile stress on blue InGaN/GaNmulti-quantum-well light-emitting diodes, WZ Tawfik, J Song, JJ Lee, JS Ha, SW Ryu, HS Choi, B Ryu, JK Lee, Appl. Suf. Sci. 283, p. 727, 2013.
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9. Controlled growth mode of high-aspect-ratio GaN nanorods by Ni/In/Ga catalyst, M Ebaid, JH Kang, JK Lee SW Ryu*, J. Phys. D: Appl. Phys. 46, p. 385105, 2013.
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10. Uni-axial external stress effect on green InGaN/GaN multi-quantum-well light-emitting diodes, B Ryu, WZ Tawfik, SJ Bae, JS Ha, SW Ryu, HS Choi, JK Lee, J. Phys. D: Appl. Phys. 46, p. 435103, 2013.