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나노메뉴팩쳐링

  • 김회준 교수 (대구경북과학기술원(DGIST))

    Subject: Additive manufacturing of functional composite materials and mechanical metamaterials for smart sensing applications

    자세히보기
    Education
    2009.5 B.S., Dept. of Mechanical Engineering, Applied Mathematics and Statistics (Double Major),Johns Hopkins University
    2011.5 M.S., Dept. of Mechanical Engineering, University of Illinois at Urbana-Champaign
    2015.1 Ph.D., Dept. of Mechanical Engineering, University of Illinois at Urbana-Champaign
    Professional Career
    2015.2-2016.11 Postdoctoral Research Associate Carnegie Mellon University
    2017.2-Present Assistant Professor, Department of Robotics Engineering, DGIST
    Lecture Summary
    Additive manufacturing of functional composite materials and mechanical metamaterials for smart sensing applications

    Recent advancements in additive manufacturing (3D printing) has enabled many exciting applications in areas of biomedical and robotic systems. Additive manufacturing is suited for a rapid prototyping of rather complex geometries that are hard to be produced using conventional manufacturing methods (i.e. injection molding, micromachining, shearing and forming). Among various 3D printing technologies FFF (fused filament fabrication) or so called (fused deposition modeling) allows a wide range of printable materials while ensuring mm scale printing resolution. FFF technology also allows a facile method to integrate functional nanomaterials to add additional dimension of the printed structure, and thus completing the 4D printing concept.
    In this talk, I will review recent trend in FFF based 4D printing and introduce our accomplishments in PLA-CNT composite printing towards multi-axis pressure sensing with temperature calibration capabilities. The sensor can accurately detect both magnitude and direction of the applied pressure while tracking the changes in environmental temperature. In addition, I will introduce the printing of mechanical metamaterial (gyroid) and its application towards high-range pressure sensing and energy harvesting.

  • 옥종걸 교수 (서울과학기술대학교)

    Subject: Fab-less fab: lithography-free nanopatterning and vacuum-free nanoarchitecturing

    자세히보기
    Education
    2002 B.S., Mechanical and Aerospace Engineering, Seoul National University
    2007 M.S., Mechanical and Aerospace Engineering, Seoul National University
    2013 Ph.D., Mechanical Engineering, University of Michigan
    Professional Career
    2013 Research Fellow, Department of Electrical Engineering and Computer Science, University of Michigan
    2013 - 2014 Research Staff, Samsung Advanced Institute of Technology, Samsung Electronics, co., ltd.
    2014 – 2020 Assistant Professor, Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology
    2020 – Present Associate Professor, Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology
    Lecture Summary
    Fab-less fab: lithography-free nanopatterning and vacuum-free nanoarchitecturing

    Responding to the rapidly emerging needs, the next-generation micro- and nanoscale (MN) structures call for more productive and scalable fabrication methodology, namely by exploiting photomask- and etch-free MN-patterning and vacuum-free MN-architecturing. This study will present several promising strategies on that way, specifically by utilizing the direct mechanical MN patterning and solution-processable MN architecturing. As the first one, a solution-processible metal electrode embedding in dynamically inscribed nanopattern, termed SPEEDIN, is demonstrated which enables the scratch-proof, highly-durable electrode frameworks; the a micro- or nanopatterned trench structure is directly machined on a flexible substrate in a continuous fashion by dynamic nanoinscribing (DNI). Then a colloidal Ag nanoparticle solution is coated on and doctor-bladed off the trench-patterned surface, finalized by slight baking, to make the Ag wires selectively embedded inside the trenches. The second case is the solution-processable Ag nanostructure (SPAN) fabrication technique, the SPAN-mediated ZnO nanowire (ZNW) growth (SPAZN), and their practical extension to the roll-to-roll-configurable process. The nanoporous Ag layer can be created simply by coating the ionic Ag solution layer and its subsequent reduction by mild annealing. By controlling the ionic Ag solution concentration, coating speed and annealing temperature, the thickness, porosity, and morphology of the SPAN layer can be readily tuned, which can catalyze the hydrothermal ZNW growth at low temperature without resorting to high-temperature ZnO seed sintering. The SPAN/SPAZN protocol can be further scaled up by photo roll lithography (PRL). Many diverse applications can benefit from the presented methods, including but not limited to the flexible and scalable UV and gas sensors, commercially-feasible LIDARs, and transparent and wearable heaters.

    Acknowledgement

    * This work was supported by the National Research Foundation of Korea (NRF) grants (No. 2021M3H4A3A02099204 (Ministry of Science and ICT), and No. 2019R1A6A1A03032119 (Ministry of Education)), funded by the Korean Government.
  • 이호원 교수 (서울대학교)

    Subject: Digital 4D Printing for Engineered Living Materials

    자세히보기
    Education
    1997.3 - 2004.2 B.S., Mechanical Engineering, Seoul National University
    2004.3 - 2006.2 M.S.,Mechanical Engineering, Seoul National University
    2006.8 - 2011.9 University of Illinois at Urbana-Champaign Champaign, IL Ph.D. in Mechanical Engineering
    Professional Career
    2006.8 – 2011.9 University of Illinois at Urbana-Champaign Champaign, IL
    Graduate Research Assistant
    Graduate Teaching Assistant
    2011.10 – 2013.12 Postdoctoral Associate, Massachusetts Institute of Technology Cambridge, MA Battelle/MIT Postdoctoral Fellow Advisor: Prof. Nicholas X. Fang
    2014.1 – 2021.2 Assistant Professor, Rutgers University New Brunswick, NJ Department of Mechanical and Aerospace Engineering
    2021.3 – Present Associate Professor, Seoul National University Seoul, Korea Department of Mechanical Engineering
    Lecture Summary
    Digital 4D Printing for Engineered Living Materials

    Engineered living materials refer to artificial materials systems that have attributes of living systems, including the ability to sense the presence of external stimuli and adapt to the changing environment. Such materials systems offer tremendous potential for autonomous and intelligent engineering systems when precisely manufactured in specific architectures with programmed responses. Emerging pathway to create dynamic and adaptive mechanical systems involves additive manufacturing (often called 3D printing) of responsive materials. This approach has been recently termed “4D printing”, with the 4th dimension being time.

    In this work, 4D printing of responsive materials using projection micro-stereolithography (PµSL) is studied. PµSL is a micro 3D printing technique that turns light into a complex 3D structure by utilizing digital light processing (DLP) technology. Combining rapid, versatile, and scalable micro 3D printing technique with smart materials, design principles and mechanics inspired by exquisite motions and morphologies in nature are physically realized. Micro-structures that can transform, move, and even jump are demonstrated by programming of dynamic response of various responsive hydrogels. In addition, unprecedented access to micro- and nano-scale afforded by precision micro 3D printing allows for implementation of mechanics-driven design principles in micro-architectures, leading to mechanical properties far superior to those found in nature, such as ultra-low density and high stiffness. Furthermore, geometrically reconfigurable, functionally deployable, and mechanically tunable lightweight material is created through 4D printing with a shape memory polymer. Also discussed is some of biomedical applications of 4D printing including a microneedle array with enhanced tissue adhesion and transformable culture tubes for rapid histological analysis of spheroids/organoids.

나노소재

  • 강승균 교수 (서울대학교)

    Subject: Biodegradable Nanomaterials for Zero-Waste Electronics

    자세히보기
    Education
    2006 B.S., Materials Science and Engineering, Seoul National University, Korea
    2012 Ph.D., Materials Science and Engineering, Seoul National University, Korea,
    Professional Career
    2012 Guest lecturer, UNIST, School of Mechanical & Advanced Materials Engineering, 313 Mechanical Behavior of Materials
    2016 Guest lecturer, Purdue University, Biomedical Engineering, BME 495 Soft Bioelectronics
    2012 - 2017 Postdoctoral fellowship
    2017 - 2019 Department of Bio and Brain Engineering, KAIST
    2019- 2021 Assistant professor, Department of Materials Science and Engineering, Seoul National University
    2019 – Present Associate professor,Department of Materials Science and Engineering, Seoul National University,
    Lecture Summary
    Biodegradable Nanomaterials for Zero-Waste Electronics

    There are growing interest in worldwide waste issue as the environmental pollution caused by plastic waste become serious. The electronic waste, called E-waste, is also a part of complex and important issue in waste management. In particular, wearable patch-type electronic devices are emerging as future electronic devices for ubiquitous IT access and advanced real-time bio-healthcare, so disposal strategy of them becomes important. The patch-type electronic device uses a crosslinked elastomeric polymer, which is hard to be degraded into smaller molecule, to maximize flexibility and stretchability. The multiplayer structure with small amount of nanomaterials and films makes the recycle difficulty and inefficient. The recently proposed concept of transient electronic device which is composed only of biodegradable materials presents a new perspective of environmentally friendly and biodegradable devices for zero-waste wearable electronics. In this presentation we would like to introduce the transient electronic technology focusing on the waste management application of flexible and stretchable electronic devices. An MgZnCa-based amorphous alloy is introduced as a conductive nanomaterial with flexible and stretchable properties. This biodegradable material showed excellent elongation and fatigue resistance with superior elasticity originated from the free crystalline-defects. Tribonanogenerator scavenging electricity from mechanical frictions demonstrated the performance and longevity of biodegradable conductive alloys. In addition, we present a biodegradable and conductive composite ink that enables conductive interconnecting of transient devices. Introducing biodegradable lubricants assisted the uniform dispersion of micro particles in polymer matrix and maximized both elongation and conductivity. Finally, application examples for wearable and implantable medical devices including intracranial pressure monitor, wireless electroceuticals, and wearable strain monitor will be discussed.

  • 장재범 교수 (KAIST)

    Subject: Visualization of the nanoscale details of biological structures using electron microscopy and fluorescence microscopy

    자세히보기
    Education
    2001.3 – 2008.2 B.S., ., Physics, Biological Science (double major)
    Korea Advanced Institute of Science and Technology, Korea
    2008.9 – 2014.1 Ph.D., Department of Materials Science and Engineering
    Massachusetts Institute of Technology, USA
    Professional Career
    2014.3 – 2016.2 Postdoctoral associate
    Massachusetts Institute of Technology (MIT), USA
    2016.3 – 2018.8 Assistant professor
    Sungkyunkwan University, Korea
    2018.8 - Present Assistant professor
    Korea Advanced Institute of Science and Technology, Korea
    Lecture Summary
    Visualization of the nanoscale details of biological structures using electron microscopy and fluorescence microscopy

    Visualization of proteins inside biological systems with a nanoscale resolution is critical to understanding the molecular mechanism behind the biological phenomena. In the last thirty years, various super-resolution imaging techniques have been developed, but still achieving the resolution beyond the diffraction limit of the light is challenging. In addition, such super-resolution imaging of proteins inside thick tissue slices is even more challenging. Here, we introduce two imaging techniques, which are the Development of silver on gold nanoparticles for correlative fluorescence and scanning electron Microscopy (DecoM) and the Whole-body Expansion Microscopy (ExM). DecoM images the same specimen with electron microscopy and fluorescence microscopy. Electron microscopy images provide the nanoscale details of the labeled proteins and fluorescence microscopy images provide the molecular information. When these two images are merged, multiplexed super-resolution imaging of cultured cells can be achieved. Whole-body ExM, on the other hand, uses only fluorescence microcopy. Instead, this technique uses swellable hydrogel to expand biological specimens physically. After expansion, nanoscale details of labeled proteins inside thick tissue slices can be clearly visualized with diffraction-limited microscopy. These two techniques would be highly useful tools to study the molecular mechanism of life.

  • 강용묵 교수 (고려대학교)

    Subject: New perspectives for balancing the inharmony between electrons and alkali ions in layered cathodes

    자세히보기
    Education
    1999 B.S., Korea Advanced Institute of Science and Technology
    2001 M.S., Korea Advanced Institute of Science and Technology
    2004 Ph.D., Korea Advanced Institute of Science and Technology
    Professional Career
    senior researcher at Samsung SDI Co., LTD
    professor at Department of Materials Science and Engineering in Korea University
    research advisor in National Institute for Materials Science, Japan
    Lecture Summary
    New Perspectives for Balancing the Inharmony Between Electrons and Alkali Ions in Layered Cathodes

    Visualization of proteins inside biological systems with a nanoscale resolution is critical to understanding the molecular mechanism behind the biological phenomena. In the last thirty years, various super-resolution imaging techniques have been developed, but still achieving the resolution beyond the diffraction limit of the light is challenging. In addition, such super-resolution imaging of proteins inside thick tissue slices is even more challenging. Here, we introduce two imaging techniques, which are the Development of silver on gold nanoparticles for correlative fluorescence and scanning electron Microscopy (DecoM) and the Whole-body Expansion Microscopy (ExM). DecoM images the same specimen with electron microscopy and fluorescence microscopy. Electron microscopy images provide the nanoscale details of the labeled proteins and fluorescence microscopy images provide the molecular information. When these two images are merged, multiplexed super-resolution imaging of cultured cells can be achieved. Whole-body ExM, on the other hand, uses only fluorescence microcopy. Instead, this technique uses swellable hydrogel to expand biological specimens physically. After expansion, nanoscale details of labeled proteins inside thick tissue slices can be clearly visualized with diffraction-limited microscopy. These two techniques would be highly useful tools to study the molecular mechanism of life.

나노바이오

  • 이내응 교수 (성균관대학교)

    Subject: Biosensors towards on-site testing and self-testing

    자세히보기
    Education
    1986 BS., Seoul National University
    1988 MS., Seoul National University
    1996 Ph D., Materials Science and Engineering from University of Illinois at Urbana-Champaign
    Professional Career
    1987.6 – 1990.5 동선특수재료(주) 연구소 (연구원)
    1990.8 – 1996.3 Coordinated Science Lab., University of Illinois (Research Assistant)
    1996.3 – 1998.2 Lam Research Corp., USA (Senior Process Engineer
    1998.4 – 2004.3 성균관대학교 재료공학과 (전임강사, 조교수)
    2004.4 – 2010.3 성균관대학교 신소재공학부 (부교수)
    2004.9 – 2004.12 Dept. of ECE, Nagoya University (방문교수)
    2005.3 – 2005.5 Dept. of Physics, University of West Bohemia (방문교수)
    2009.3 – 2011.2 성균관대학교 공과대학 (부학장)
    2012.1 - 2013.1 Dept. of Bioengineering, Stanford University (방문교수)
    2010.3 - 현재 성균관대학교 나노기술원 (SKKU Advanced Institute of Nanotechnology, SAINT) (겸임교수)
    2010.4 - 현재 성균관대학교 신소재공학부 (교수)
    2011.3 - 현재 성균관대학교 융합의과학원 (Samsung Advanced Institute of Health Sciences and Technology, SAIHST) (겸임교수)
    2018.9 - 현재 성균관대학교 양자생명물리과학원 (Institute of Quantum Biophysics, IQB) (겸임교수)
    Lecture Summary
    Biosensors towards on-site testing and self-testing

    On-site testing and self-testing are promising for personal safety and healthcare in near future. For the purpose, a seamless integration of sample collection, treatment and detection is required to minimize user intervention while the assay accuracy should be secured. Recently, a variety of biosensor-integrated mobile or wearable systems have been extensively investigated but there have been many challenging hurdles in meeting the requirements (Figure 1). Here, we will discuss digital fluorescence imaging techniques integrated with fluorescence-enhancing nanomaterials for highly sensitive on-site detection of chemicals and pathogenic bacteria in environmental and foodsamples which can be integrated with smartphone or portable IOT systems.

    Furthermore, we will present our recent works on wearable biosensor patches integrated with fully stretchable components of microfluidic device for sweat collection, transport and electrochemical biosensors based on nanomaterials for label-free immunodetection of cortisol and neuropeptide-Y as well as continuous monitoring of glucose in humansweat. The wearable electrochemical biosensor patches with a seamless integration of sampling and detection functions are promising for self-testing under untact environment.

    Figure 1. Concept of mobile and wearable POCT technologies for on-the-spot testing and self-testing. Reproduced form Chemical Society Reviews (2020, S. Shrivatava, T.Q. Trung and N.-E. Lee).

  • 이문근 박사 (나노종합기술원)

    Subject: Development of cartridge-based high-throughput nano-analysis system for early diagnosis of dementia

    자세히보기
    Education
    1990-1997 B.S., Hanyang University
    1997-1999 M.S., Hanyang University
    2005-2012 Ph.D., Hanyang University
    Professional Career
    1999.5 – 2005.4 Analytic Engineer in Analysis Team, Memory R&D Center at Hynix Semiconductor Inc
    2005.6 – 2010.10 Application Engineer in Veeco Metrology at Veeco Korea Inc
    2009.8 – 2010.2 Application Engineer in Veeco Solar at Veeco Korea Inc.
    2010.11 - 2011.5 OLED Site Manager in Veeco OLED at Veeco Korea Inc.
    2011.6 - 2011.9 TPS (Total Product Support) member in Veeco MOCVD at Veeco Korea Inc.
    2021.2 – 2012.8 Senior Researcher in Nanobio Fusion Tech. at National Nano-Fab Center
    2012.9 – Present Senior Researcher in Center for Nanobio Development at National Nano-Fab Center
    Lecture Summary
    Development of cartridge-based high-throughput nano-analysis system for early diagnosis of dementia

    Although research on biomarkers for diagnosing Alzheimer's dementia continues, technology for diagnosing early dementia, including mild cognitive impairment, is well known as a very difficult challenge. In particular, many of the major biomarkers for dementia diagnosis need to detect extremely low concentrations of several pg/ml, and the need for mass production as a diagnostic technology that quickly analyzes large samples has emerged. This study deals with the research and development of a high-throughput automated nano-analysis system that detects dementia diagnostic markers at very low concentrations by utilizing vertical cartridges for sample pre-processing based on nano-bio fusion technology.

  • 김재혁 교수 (부산대학교)

    Subject: Development of rapid multiplex kit for detection of infectious diseases based on high efficiency upconversion nanophotonic material

    자세히보기
    Education
    1998.3 - 2002.2 B.S. in Chemical Engineering, Seoul National University, Republic of Korea
    2002.3 - 2009.2 Unified Master’s and Doctor’s Course at department of Chemical and Biological Engineering, Seoul National University, Republic of Korea
    Professional Career
    2009.3 – 2010.9 Postdoctoral researcher in School of Chemical and Biological Engineering, Seoul National University, Republic of Korea
    2010.10 – 2013.7 Postdoctoral researcher in School of Civil and Environmental Engineering, Georgia Institute of Technology, US
    2013.8 – 2014.2 Postdoctoral associate in department of Chemical and Environmental Engineering, Yale University, US
    2014.3 – 2018.2 Assistant professor in School of Chemical and Environmental Engineering, Pusan National University, Republic of Korea
    2018.3 - Present Associate professor in School of Chemical and Environmental Engineering, Pusan National University, Republic of Korea
    Lecture Summary
    Development of rapid multiplex kit for detection of infectious diseases based on high efficiency upconversion nanophotonic material

    Due to the nature of infectious diseases that spread rapidly, prompt and accurate diagnosis of infection at an early stage is very important to prevent the pandemic. In addition, as the inspection test target should be expanded to the level of complete enumeration according to the specificity of the infectious disease, the superiority, supply, and low cost of diagnostic technology must also be secured.

    The immunodiagnostic kit is the most effective way to implement this, but due to the optical limitations of the detection particles and the structural limitations of the strip-based immunodiagnostic kit, the diagnostic sensitivity and reliability are significantly lower than that of the PCR-based diagnostic technology.

    In this study, we aim to develope a high-reliability/-sensitivity rapid multiplex kit for detection of multiple infectious deseases by integrating two breakthrough technologies; i) triplet-triplet annihilation-based upconversion (TTA-UC) nanophotonic material, and ii) and ii) the microfluidic-based immunodiagnostic kit, which will overcome the limitations of the existing detection nanoparticles, and strip-based immunodiagnostic kit, respectively. In particular, the TTA-UC nanophotonic material, a core material in our research, aims for 100% localization and semi-mass production from material to synthesis technology.

나노에너지

  • 이상욱 교수 (한양대학교 ERICA )

    Subject: Theoretical Investigation of Argyrodite-based Solid State Electrolytes: Screening Descriptor

    자세히보기
    Education
    1992.3-1999.2 한양대학교, 화학과 학사
    1999.3-2001.2 한양대학교 이론물리화학, 석사
    2005.10-2008.9 Tohoku University, Japan 전산재료공학, 박사
    Professional Career
    2001.2-2012.8 LG화학 기술연구원, 분석센터, 계산화학팀 부장
    2005.10-2008.9 LG화학 기술연구원, 일본 Tohoku University, 학위파견
    2012.9-2014.8 울산대학교 화학과, 조교수
    2014.9-현재 한양대학교 ERICA 화학분자공학과 교수
    Lecture Summary
    Theoretical Investigation of Argyrodite-based Solid State Electrolytes: Screening Descriptor

    Lithium argyrodites is the promising family of solid-state electrolytes which have been developed with considerable interests with numerous substituted compositions. To study vast number of compositions, potentially available from the Periodic Table, it is essential to design a simple descriptor for the computational screening of Li argyrodite-based superionic conductors. Furthermore, there is a need for a method to accurately predict experimental Li-ion conductivity by considering the degree of crystallinity and the thermodynamic and kinetic contributions of local structures with different types of atomic arrangement. Herein, we systematically investigated the “composition-structure-property” relationship in Li6–xPS5–xX1+x (0 ≤ x ≤ 1 and X=Cl, Br or I) structures using ab initio molecular dynamics (AIMD) simulations.
    Our results reveal that the uniform size of cage-like Li sublattice around the S2–/X– single anions accelerate the inter-cage diffusion of Li-ions and consequently improves the Li-ion conductivity. And by comparing the theoretically predicted Li-ion conductivity using the proposed correction method for accurate bulk ionic conductivity with experimentally observed Li-ion conductivity in halogen excess argyrodite, we clearly confirm there is a close correlation between the Li-ion conductivity and the standard deviation (STD) of Li-cage size. Therefore, we propose a standard deviation of Li-cage size around S2–/X–as a descriptor for the screening of argyrodite-based superionic conductors.

  • 인수일 교수 (대구경북과학기술원(DGIST))

    Subject: Solar fuels: Research and development strategies to accelerate photocatalytic CO2 conversion by nano-technology

    자세히보기
    Education
    2000 인하대학교 화학과 학사
    2003 한국과학기술원(KAIST) 화학과 석사
    2008 University of Cambridge 화학과 박사
    Professional Career
    2000.12 – 2001.02 미국 UC 버클리 방문연구원
    2008 - 2010 덴마크 공대 박사후 연구원
    2010 - 2012 미국 펜실베니아 주립대 박사후 연구원
    2019.9 – 2020.8 미국 캘리포니아 공대(Caltech) 방문 교수
    2020.8 - Present DGIST 에너지시스템공학전공 부교수 (현)
    Lecture Summary
    Solar fuels: Research and development strategies to accelerate photocatalytic CO2 conversion by nano-technology

    Research into CO2 reduction has the potential to diminish our dependence on petroleum products and restrain global warming. Fossil fuels account for a large majority of global energy consumption, resulting in excessive emissions of CO2 and other harmful gases. Furthermore, the current global economy and human society are heavily reliant on fossil fuels. Thus, there is an urgent need to develop renewable energy resources to generate energy and chemicals. Photocatalytic CO2 reduction is one promising strategy for obtaining renewable energy and hydrocarbon fuels. However, we must first confront several challenges, such as limited light-harvesting and suboptimal photocatalytic activity. These challenges and potential solutions are the focus of the present talk, alongside a discussion of our current theoretical understanding and consideration of the commercial/economic viability of CO2 photoreduction technology.

    • 1. "A novel N-doped graphene oxide enfolded reduced titania for highly stable and selective gas-phase photocatalytic CO2 reduction into CH4: An in-depth study on the interfacial charge transfer mechanism", Chemical Engineering Journal 416 (2021) 127978 
    • 2. "Activity, selectivity, and stability of earth-abundant CuO/Cu2O/Cu0-based photocatalysts toward CO2 reduction", Chemical Engineering Journal 429 (2022) 131579 
    • 3. "Electronic interaction between transition metal single-atoms and anatase TiO2 boosts CO2 photoreduction with H2O", Energy & Environmental Science (2021) DOI: 10.1039/D1EE01574E
    • 4. "Solar fuels: Research and development strategies to accelerate photocatalytic CO2 conversion into hydrocarbon fuels", Energy & Environmental Science (2021) DOI: 10.1039/d1ee02714j
  • 신현정 교수 (성균관대학교)

    Subject: Charge Transport Mechanism in Highly Efficient Organic – Inorganic Lead Halide Perovskite Solar Cells

    자세히보기
    Education
    1986-1991 B.S. Ceramic Engineering, YonSei University, Seoul, Korea
    1991-1994 M.S. Materials Science and Engineering, Case Western Reserve University, Cleveland, OH USA
    1994-1996 Ph.D. Materials Science and Engineering, Case Western Reserve University, Cleveland, OH USA
    Professional Career
    1996 – 1997 Alexander von Humboldt Research Fellow, Max-Plank Institute fur Metallforschung, Stuttgart, Germany
    1997 – 2002 Member of Research Staff, Samsung Advanced Institute of Technology, Suwon, Korea
    2003 – 2003 Visiting Scholar, Max-Plank Institute fur Metallforschung, Stuttgart, Germany
    2007 – 2008 Visiting Professor, Department of Materials and Engineering, University of Texas, Dallas, Tx
    2002 – 2012 Visiting Researcher, Samsung Advanced Institute of Technology, Suwon, KoreaProfessor, School of Advanced Materials Engineering, Kookmin University
    2019 – 2020 Visiting Researcher, Samsung Advanced Institute of Technology, Suwon, Korea
    2018 – Present Director, Nature Inspired Materials Processing Research Center, Sungkyunkwan University, Suwon, Korea
    2012 - Present Professor, Department of Energy Science, Sungkyunkwan University
    Lecture Summary
    Charge Transport Mechanism in Highly Efficient Organic – Inorganic Lead Halide Perovskite Solar Cells

    The interaction of charge carriers with lattice vibrations (phonons) in hybrid perovskites is currently still a subject of intense debate and a clear understanding of the mechanism governing intrinsic charge-carrier transport is not provided. To understand polaron formation and transport dynamics, we have examined the temperature dependence of the charge-carrier mobility, µ, which was found to a scale with (Temp.)p. Here we investigate the phototransistors based on hybrid perovskite (MAPbI3 and FAPbI3) films and provide direct evidence for their superior carrier transport property with ambipolar characteristics. Careful temperature dependent studies reveal the values of exponent (p) in the mobility vs temperature curve, which are p = -1.77, -1.41 and -0.98 for the orthorhombic, tetragonal, and cubic phases of MAPbI3, respectively, which proposed that electron-phonon coupling is mainly governed by deformation potential scattering with acoustic phonons at low temperature and optical phonons at higher temperature. We believe this result lay the groundwork for more quantitative models of charge-carrier mobility values and cooling dynamics that underpin new explorations of functional hot carrier materials and photovoltaic device operation in the future.

나노정보전자

  • 이문상 교수 (인하대학교)

    Subject: In-situ visualization of localized surface plasmon-driven hot hole

    자세히보기
    Education
    2004.9 – 2006.8 Master, Department of Material Science and Engineering, Seoul National Univ. (Korea)
    2011.9 – 2014.8 Ph.D., Department of Material Science and Engineering, Seoul National Univ. (Korea)
    Professional Career
    2006.07 - 2011.12 Samsung Advanced Institute of Technology(SAIT), Samsung Electronics Co., Ltd, as a memeber
    2011.01 - 2013.10 Samsung Advanced Institute of Technology(SAIT), Samsung Electronics Co., Ltd, as a project leader
    2013.11 - 2015.1 Semiconductor R&D Center, Samsung Electronics Co., Ltd, as a team member
    2015.3 - 2021.02 Korea Basic Science Institute
    2021.03 - Present Department of advanced materials engineering, Inha University
    Lecture summary
    In-situ visualization of localized surface plasmon-driven hot hole

    Non-radiative surface plasmon decay produces highly energetic electron-hole pairs with desirable characteristics, but the measurement and harvesting of nonequilibrium hot holes remains challenging due to ultrashort lifetime and diffusion length. Here, we visualize the direct observation of surface plasmon-driven hot holes created in a Au nanoprism/p-GaN platform using photoconductive atomic force microscopy (pc-AFM). Significant enhancement of photocurrent in the plasmonic platforms under light irradiation was revealed, providing direct evidence of plasmonic hot hole generation. Experimental and numerical analysis verified that a confined |E|-field surrounding a single Au nanoprism spurred resonant coupling between localized surface plasmon resonance (LSPR) and surface charges, thus boosting hot hole generation. Also, we demonstrate a direct photoelectrochemical (PEC) experimental proof that the injection of plasmonic hot holes depend on the size of the metallic nanostructures. PEC results clearly indicate that a plasmonic template with smaller Au nanoprisms exhibits higher external and internal quantum efficiency rates, leading to a significant enhancement of both the oxygen evolution and hydrogen evolution reactions. The direct visualization of hot hole flow at the nanoscale provides significant opportunities for harnessing the underlying nature and potential of plasmonic hot holes.

  • 이명재 박사 (KIST)

    Subject: Single-photon avalanche diode

    자세히보기
    Education
    2006 B.S., Electrical and Eelectronic Engineering, Yonsei University
    2008 M.S., Electrical and Electronic Engineering, Yonsei Univeristy
    2013 Ph.D., Electrical and Electronic Engineering, Yonsei Univeristy
    Professional Career
    2010.2 – 2010.5 Guest Scientist, IHP
    2013.2 – 2013.8 Postdoc, Yonsei University
    2013.8 – 2017.2 Postdoc Researcher. TU Delft
    2017.2 – 2019.1 Scientist, EPFL
    2019.1 – Present Principal Inverstigator / Senior Research Scientist, KIST
    Lecture summary
    Single-photon avalanche diode

    A single-photon avalanche diode (SPAD) is a solid-state photodiode/photodetector that can detect very low-intensity signals, down to the single-photon level, thanks to its avalanche gain mechanism and generate a digital pulse from a photon. So, with the SPAD, one can do accurate photon counting and time-of-arrival detection, and therefore it has been receiving an enormous amount of attention from scientific and industrial communities because the device has a strong impact on next-generation applications such as advanced driver assistance systems (ADAS), autonomous vehicles, robots, drones, uncrewed aerial vehicle, machine vision, AR/VR, etc. with great scientific, economic, and social potential. It is also very useful technology for biomedical and quantum applications, including time-of-flight positron emission tomography (TOF PET), fluorescence-lifetime imaging microscopy (FLIM), superresolution microscopy, near-infrared imaging or optical tomography (NIRI/NIROT), quantum key distribution (QKD), quantum random number generator (QRNG), quantum cryptography, etc. A SPAD based on CMOS technology is considered the most suitable solution for most of the applications since CMOS technology promises the most cost-effective and high-volume solution as a universal platform. This talk will give an overview of the SPAD, its applications, and the challenges and requirements needed for SPADs in CMOS technology. A brief outlook on the future of the SPAD will conclude the talk.

  • 강보석 교수 (성균관대학교)

    Subject: Single-crystalline organic semiconductor thin films deposited by motion-programmed bar-coating

    자세히보기
    Education
    2006.3 – 2010.2 Dual B.S. in Chemical Engineering and Mathematics, POSTECH, Pohang, Korea Graduated Summa Cum Laude (1st place)
    2010.3 – 2015.8 Ph.D. in Chemical Engineering, POSTECH, Pohang, Korea
    Thesis title: “Structure and Charge Transport in Organic Semiconductor Thin Films”
    Professional Career
    2015.8 – 2016.2 Postdoctoral Research Associate, Polymer Research Institute and Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
    2016.3 – 2019.2 Postdoctoral Research Associate, Center for Advanced Soft Electronics (CASE) and Department of Chemical Engineering, POSTECH, Pohang, Korea
    2018.5 – 2019.2 Postdoctoral Research Associate, Cavendish Laboratory, University of Cambridge, Cambridge, UK
    2019.3 – present Assistant Professor, Sunkyunkwan University
    Lecture summary
    Single-crystalline organic semiconductor thin films deposited by motion-programmed bar-coating

    Solution-processed organic thin-film transistors (OTFTs) have received enormous interest due to their great potential for realizing low-cost, lightweight and flexible electronics applications. Although several novel solution-processing techniques for achieving highly-crystalline organic semiconductor (OSC) films have been introduced to OTFTs, there still remains a challenging work to control thin-film properties. Here, I will present a new solution coating method that is compatible with a fast-moving roll-to-roll system by using a gap-controllable wire-bar and a bar-motion programming strategy. The developed method is highly practical and industry-friendly as well as feasible to fabricate high-quality OSC thin films in a large area at a high rate. A crystallization and growth mechanism of the bar-coated films and structure-charge-transport properties will be discussed.