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신소재공학전공(과)
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연구실 :
팔달관707

연구실번호 :
1680

이메일 :
hakkiyu@ajou.ac.kr

연구관심분야 :
저차원 재료 성장 및 응용

홈페이지 :
https://sites.google.com/site/hakkiyu/
학력
졸업연도/학교/학위
2010.08 포항공과대학교 박사
졸업연도/학교/학위
2003.08 포항공과대학교 학사
경력 -Postdoctoral Research Fellow (09/2010 ~ 10/2011)
Pohang University of Science and Technology (POSTECH), Dept. of Materials Science and Engineering, Research Areas: Fabrication of large area nano-structures and applications to optoelectronic devices (Advisor: Prof. Jong-Lam Lee).
-Postdoctoral Research Fellow (11/2011 ~ 02/2015)
Department of Dynamics at Surfaces, Max Planck Institut für Biophysikalische Chemie & Institut für Physikalische Chemie, Georg-August University of Göttingen, Research Areas: Synthesis of complex surfaces for molecular beam scattering experiments (Advisor: Prof. Alec M. Wodtke).
연구분야 1. Rational synthesis of nano-materials
-Graphene growth and applications
Growth of high quality graphene layer using CVD method and transfer process.
Making free-standing graphehe using TEM grid patterns.
Application of free-standing graphene for low energy electron scattering.
Application of free-standing graphene for He scattering and molecular beam scattering.
Application of free-standing graphene for bio-molecule imaging using Cryo-TEM.
-Large-area nano facet (MgO), nanorods & wires (MgO, ZnO, ITO, and In2O3)
Application to GaN-based high-power vertical-structure light emitting diodes (V-LEDs) &
Alq3 based organic light emitting diodes (OLEDs) for solid-state lightings.
Piezo-electronic devices such as haptic devices and energy harvesting devices.
Super-hydrophobic surfaces for self-cleaning devices.
-Nanomaterials for advanced catalysts and sensors (VO2, RuO2, SnO2, MoO2, WO2, TiO2, and ReO3)
Growth mechanism analysis of nanorods (VLS & non-VLS process).
Metal oxide nanowire with carbon complex for Li ion battery anode applications.
Mott-transition of VO2 in nano-structure and their application as sensors.
2. Epitaxial growth of close packed metal (Ag, Cu, Pt, Au etc) and oxide materials (MgO, TiN, ZnO etc) and their characterization
Domain matching epitaxy for the large lattice mismatch systems.
Buffer layers of functional oxide such as ferroelectrics and wurtzite semiconductors.
3. Solar cell electrode design for high efficiency
ITO nano-branches for high efficient organic solar cells (P3HT:PCBM solar cells).
MgO facet design for the Yablonovitch limit (a-Si and Si based solar cells).
Graphene as a flexible electrode of organic solar cells.
Surface plasmon for the advanced light absorption.
Design of distributed Bragg reflector (DBR) for total light absorption.
4. MgO based secondary electron emitters
Control of preferred orientation of polycrystalline MgO film.
Defect level control using excimer laser annealing.
Application to plasma display panels, electron multipliers, and mass spectrometers.
기타 Patent.

1. (Granted) 유학기, 이종람
"보호막 및 그 형성 방법" (대한민국, 등록번호: 10-0886828-0000).
2. (Granted) H. K. Yu, J. -L. Lee
"PASSIVATION FILM AND METHOD OF FORMING THE SAME" (WO2008054102).
3. (Granted) H. K. Yu, J. -L. Lee
"PASSIVATION FILM AND METHOD OF FORMING THE SAME" (US7915153).
4. (Granted) 손준호, 유학기, 이종람
“MgO 피라미드 구조를 갖는 발광소자 및 그 제조방법” (대한민국, 등록번호: 10-1165259-0000).
5. (Granted) J. H. Son, H. K. Yu, J. -L. Lee
“LIGHT-EMITTING DEVICE HAVING AN MGO PYRAMID STRUCTURE AND MANUFACTURING METHOD FOR SAME” (WO2012005459).
6. (Granted) J. H. Son, H. K. Yu, J. -L. Lee
“Light emitting device having MgO pyramid structure and method for fabricating the same” (US20130207074 A1).
7. (Granted) J. H. Son, H. K. Yu, J. -L. Lee
“Light emitting device having MgO pyramid structure and method for fabricating the same” (US20158993997 B2).
8. (Granted) 유학기, 이종람
“버퍼층을 이용한 실리콘 기판 위의 산화아연 박막 형성 방법” (대한민국, 등록번호: 10-1135928-0000).
9. (Granted) 손준호, 유학기, 이종람
“표면증강라만산란 분광용 기판 제작 방법” (대한민국, 등록번호: 10-1097205-0000).
10. (Granted) 유학기, 정관호, 동완재, 이종람
“태양전지용 기판 및 이의 제조방법” (대한민국, 등록번호: 10-1186560-0000).
11. (Granted) H. K. Yu, G. H. Jung, W. J. Dong, J. -L. Lee
“SUBSTRATE FOR SOLAR CELL AND METHOD FOR MANUFACTURING SAME” (WO2013006017).
12. (Granted) 유학기, 이종람
“전자선 증착장비를 이용한 인듐 주석 산화물 나노 막대 제조 방법” (대한민국, 등록번호: 10-1217786-0000).
13. (Granted) 송양희, 유학기, 이종람
“습식 식각형 버퍼층을 이용한 수직형 발광다이오드 제조 방법” (대한민국, 등록번호: 10-1238169-0000).
14. (Granted) 유학기, 이종람
“전자선 증착 장비를 이용한 산화아연 나노 막대 제조방법” (대한민국, 등록번호: 10-1243633-0000).
15. (Granted) 유학기, 이종람
“투명 전도성 플렉서블 기판 및 그 제조방법” (대한민국, 등록번호: 10-1272796-0000).
16. (Granted) 정관호, 유학기, 동완재, 함주영, 이종람
“도전성 플렉서블 기판 및 그 제조방법” (대한민국, 등록번호: 10-1284873-0000).
17. (Granted) 유학기, 동완재, 정관호, 이종람
“태양전지 소자 및 그 제조방법” (대한민국, 등록번호: 10-1295199-0000). Prime Minister Award (2nd prize), the 32th Korea Invention Patent Exhibition.
18. (Granted) H. K. Yu, W. J. Dong, G. H. Jung, J. -L. Lee
“SOLAR CELL ELEMENT AND MANUFACTURING METHOD FOR SAME” (WO2013006016). Prime Minister Award (2nd prize), the 32th Korea Invention Patent Exhibition.
19. (Granted) 김성준, 홍기현, 유학기, 이종람
“유기 발광 다이오드용 기판 및 이의 제조방법” (대한민국, 등록번호: 10-1317276-0000).
20. (Granted) H. K. Yu, A. M. Wodtke
“Graphene with very high charge carrier mobility and preparation thereof” (EP2801551 A1)
21. (Granted) H. K. Yu, A. M. Wodtke
“Graphene with very high charge carrier mobility and preparation thereof” (WO2014180919 A1)
22. (Revision) 손준호, 유학기, 이종람
“MgO 피라미드 구조를 갖는 발광소자 및 그 제조방법” (대한민국, 분할출원: 10-2011-0115338).
논문 및 연구활동
연구활동(주요논문)
  • [논문] Understanding of preferred orientation formation in rock-salt materials: The case of MgO (CRYSTAL GROWTH & DESIGN) - 2016.04
    이종람, 류학기
  • [논문] Chemical vapor deposition of graphene on a "peeled-off" epitaxial Cu(111) foil: a simple approach to improved properties (ACS NANO) - 2014.08
    류학기, 김기수, 이종람, Alec M. Wodtke, Claus Ropers, Janina Krieg, Klaus Kern, Kannan Balasubramanian , Manisankar Maiti
  • [논문] Self-Connected and Habitually Tilted Piezoelectric Nanorod Array (ACS NANO) - 2011.11
    류학기, 이종람, 백정민
  • [논문] Three-Dimensional Nanobranched Indium–Tin-Oxide Anode for Organic Solar Cells (ACS NANO) - 2011.10
    류학기, 정관호, 이종람, 동완재
  • [논문] Enhanced Light Out-Coupling of Organic Light-Emitting Diodes: Spontaneously Formed Nanofacet-Structured MgO as a Refractive Index Modulation Layer (ADVANCED MATERIALS) - 2010.11
    류학기, 홍기현, 이종람, 김기수, 김성준, 이일환
국제학술논문지
  • [논문] Growth of ZnO thin film on graphene transferred Si (100) substrate (THIN SOLID FILMS) - 2016.10
    류학기, 서형탁, 유선종, 이아람, 김건영, 조인선, 안병민
  • [논문] Graphene protected Ag nanowires: Blocking of surface migration for thermally stable and wide-range-wavelength transparent flexible electrodes (RSC ADVANCES) - 2016.09
    류학기, 이재영, 이아람
  • [논문] Copper micro-labyrinth with graphene skin: New transparent flexible electrodes with ultimate low sheet resistivity and superior stability (NANOMATERIALS) - 2016.09
    류학기
  • [논문] Local transport measurements in Graphene on SiO2 using Kelvin Probe Force Microscopy (CARBON) - 2016.06
    류학기, Philip Willke, Christian Moehle, Martin Wenderoth, Thomas Kotzott, Alec Wodtke, Anna Sinterhauf
  • [논문] Understanding of preferred orientation formation in rock-salt materials: The case of MgO (CRYSTAL GROWTH & DESIGN) - 2016.04
    이종람, 류학기
  • [논문] Selective functionalization of graphene peripheries by using bipolar electrochemistry (CHEMELECTROCHEM) - 2016.03
    류학기, Laura Zuccaro, Kannan Balasubramanian, Mitsuharu Konuma, Klaus Kern, Alexander Kuhn
  • [논문] Antireflective Indium-Tin-Oxide Nanobranches for Efficient Organic Solar Cells (APPLIED PHYSICS LETTERS) - 2016.02
    류학기, 함주영, 이종람, 동완재, 정관호, 박재용
  • [논문] Quality of graphene on sapphire: long-range order from helium diffraction versus lattice defects from Raman spectroscopy (RSC ADVANCES) - 2016.02
    류학기, Gloria Anemone, Esteban Climent-Pascual, Amjad Al Taleb, Daniel Farias, Carlos Prieto, Alec Wodtke, Alicia De Andres, Felx Jimenez-Villacorta
  • [논문] Real-Time Label-Free Direct Electronic Monitoring of Topoisomerase Enzyme Binding Kinetics on Graphene (ACS NANO) - 2015.11
    류학기, Laura Zuccaro, Cinzia Tesauro, Tetiana Kurkina, Kannan Balasubramanian, Birgitta R Knudsen, Klaus Kern, Alessandro Desideri, Paola Fiorani
  • [논문] Helium diffraction and acoustic phonons of graphene grown on copper foil (CARBON) - 2015.09
    류학기, Alec M. Wodtke, Daniel Farías, Amjad Al Taleb, Gloria Anemone
  • [논문] Effective Reduction of Copper Surface for Clean Graphene Growth (JOURNAL OF THE ELECTROCHEMICAL SOCIETY) - 2015.09
    류학기
  • [논문] Enhancing the Electrochemical and Electronic Performance of CVD-Grown Graphene by Minimizing Trace Metal Impurities (CHEMELECTROCHEM) - 2014.12
    류학기, Rodrigo M Iost, Frank N. Crespilho, Kannan Balasubramanian, Alec M. Wodtke, Klaus Kern, Laura Zuccaro
  • [논문] Growth mechanism of metal-oxide nanowires synthesized by electron beam evaporation: A self-catalytic vapor-liquid-solid process (SCIENTIFIC REPORTS) - 2014.10
    류학기, 이종람
  • [논문] Probing the Growth Habit of Highly Single Crystalline Twinned V-Shape RuO2 Nanowires by Polarized Raman Scattering (JOURNAL OF PHYSICAL CHEMISTRY C) - 2014.09
    류학기, 신해영, 이재연, 이유민, 윤석현, 정하영, 백정민, 김명화, 정세원
  • [논문] Chemical vapor deposition of graphene on a "peeled-off" epitaxial Cu(111) foil: a simple approach to improved properties (ACS NANO) - 2014.08
    류학기, 김기수, 이종람, Alec M. Wodtke, Claus Ropers, Janina Krieg, Klaus Kern, Kannan Balasubramanian , Manisankar Maiti
  • [논문] Ultrafast low-energy electron diffraction in transmission resolves polymer/graphene superstructure dynamics (SCIENCE) - 2014.07
    류학기, Max Gulde, Simon Schweda, Claus Ropers, Manisankar Maiti, Alec M. Wodtke, Sascha Schäfer, Gero Storeck
  • [논문] Effect of ion beam assisted deposition on the growth of indium tin oxide (ITO) nanowires (CRYSTENGCOMM) - 2014.05
    류학기, 이종람
  • [논문] Nano-branched transparent conducting oxides: beyond the brittleness limit for flexible electrode applications (NANOSCALE) - 2012.11
    류학기, 구본형, 이종람, 이보라, 함주영, 김성준, 정관호
  • [논문] Enhancing Light Emission of Nanostructured Vertical Light-Emitting Diodes by Minimizing Total Internal Reflection (ADVANCED FUNCTIONAL MATERIALS) - 2012.02
    류학기, 예병욱, 김범준, 손준호, 김명화, 이종람, 백정민, 송양희
  • [논문] MgO nano-facet embedded silver-based dielectric/metal/dielectric transparent electrode (OPTICS EXPRESS) - 2012.01
    류학기, 김성준, 홍기현, 김기수, 이종람, 이일환, 김경보, 김태엽, 손준호
  • [논문] Effects of W diffusion barrier on inhibition of AlN formation in Ti/W/Al ohmic contacts on N-face n-GaN (APPLIED PHYSICS LETTERS) - 2011.12
    류학기, 송양희, 이종람, 김범준, 유철종, 손준호
  • [논문] Self-Connected and Habitually Tilted Piezoelectric Nanorod Array (ACS NANO) - 2011.11
    류학기, 이종람, 백정민
  • [논문] Design of Epitaxially Strained Ag Film for Durable Ag-Based Contact to p-Type GaN (CRYSTAL GROWTH & DESIGN) - 2011.11
    류학기, 손준호, 이종람, 김범준, 송양희
  • [논문] Three-Dimensional Nanobranched Indium–Tin-Oxide Anode for Organic Solar Cells (ACS NANO) - 2011.10
    류학기, 정관호, 이종람, 동완재
  • [논문] Enhanced Secondary Electron Emission in Nanoscale Thin Metal Containing MgO Film: Laser Irradiation on Creation of F Centers (JOURNAL OF PHYSICAL CHEMISTRY C) - 2011.09
    류학기, 박응철, 이종람, 구본웅, 김영운, 류재화, 김웅권, 김재성
  • [논문] Domain Matching Epitaxy of Mg-Containing Ag Contact on p-Type GaN (CRYSTAL GROWTH & DESIGN) - 2011.06
    류학기, 송양희, 손준호, 이종람, 정관호, 이정용, 이주호
  • [논문] Design of an Interfacial Layer to Block Chemical Reaction for Epitaxial ZnO Growth on a Si Substrate (CRYSTAL GROWTH & DESIGN) - 2011.06
    류학기, 이종람, 백정민
  • [논문] Modulating ZnO nanostructure arrays on any substrates by nanolevel structure control (JOURNAL OF PHYSICAL CHEMISTRY C) - 2011.05
    류학기, 예병욱, 이종람, 백정민, 김명화
  • [논문] Facile synthesis of single crystalline metallic RuO2 nanowires and electromigration-induced transport properties (JOURNAL OF PHYSICAL CHEMISTRY C) - 2011.03
    류학기, 이유민, 백정민, 이종람, 김명화, 예병욱
  • [논문] Synthesis of metallic ReO3 nanowires (PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS) - 2010.12
    류학기, 명동신, 이유민, 김명화, 이종람, 백정민, 김웅, 이재연
  • [논문] Growth mechanism of MgO film on Si (100): Domain matching epitaxy, strain relaxation, preferred orientation formation (CRYSTAL GROWTH & DESIGN) - 2010.12
    이종람, 류학기
  • [논문] Enhanced Light Out-Coupling of Organic Light-Emitting Diodes: Spontaneously Formed Nanofacet-Structured MgO as a Refractive Index Modulation Layer (ADVANCED MATERIALS) - 2010.11
    류학기, 홍기현, 이종람, 김기수, 김성준, 이일환
  • [논문] MgO nano-pyramids structure for enhancement of light extraction efficiency in vertical light-emitting diodes (OPTICS EXPRESS) - 2010.09
    류학기, 이종람, 손준호
  • [논문] The role of reflective p-contacts in the enhancement of light extraction in nanotextured vertical InGaN light-emitting diodes (NANOTECHNOLOGY) - 2010.01
    류학기, 장호원, 이종람, 이상한, 류성욱
  • [논문] Effects of Ni cladding layers on suppression of Ag agglomeration in Ag-based Ohmic contacts on p-GaN (APPLIED PHYSICS LETTERS) - 2009.08
    류학기, 이종람, 송양희, 손준호
  • [논문] Degradation Mechanism of Secondary Electron Emission in Plasma-Exposed MgO Films (JAPANESE JOURNAL OF APPLIED PHYSICS) - 2009.07
    류학기, 김웅권, 이종람, 김재성, 류재화, 박응철
  • [논문] Low Resistance and Themarlly Stable Ohmic Contact on p-type GaN Using a RuO2 Diffusion Barrier (ELECTRONIC MATERIALS LETTERS) - 2008.10
    류학기, 이종람, 송양희, 손준호
  • [논문] Effect of N 2, Ar, and O 2 plasma treatments on surface properties of metals (JOURNAL OF APPLIED PHYSICS) - 2008.04
    류학기, 김수영, 이종람, 김기수, 김웅권, 홍기현
  • [논문] Highly efficient organic light-emitting diodes with hole injection layer of transition metal oxides (JOURNAL OF APPLIED PHYSICS) - 2005.11
    류학기, 이종람, 백정민, 김수영
  • [논문] Rhodium-oxide-coated indium tin oxide for enhancement of hole injection in organic light emitting diodes (APPLIED PHYSICS LETTERS) - 2005.08
    류학기, 김수영, 이종람, 김광영, 탁윤흥, 백정민
  • [논문] Ohmic contacts for high power LEDs (PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE) - 2004.09
    류학기, 장호원, 이종람, 김수영, 김종규
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