|★ Date & Time : 16:15-18:15, November 7 (THU)
★ Cost: FREE for ICAE 2019 Participants
Actuator applications of piezoelectrics started in late 1970s, and enormous investment was installed on practical developments during ‘80s, aiming at consumer applications such as precision positioners with high strain materials, multilayer device designing and mass-fabrication processes for portable electronic devices, ultrasonic motors for micro-robotics and smart structures. After the slump due to the worldwide economic recession in late ‘90s, we are now facing a sort of “Renaissance” of piezoelectric actuators according to the social environmental changes.
In order to stimulate young researchers in this area, I dare to create this teaching material, “Professor’s Misconceptions Top 10”. The “piezoelectric actuator” is a really interdisciplinary area, to which materials, electrical and mechanical engineers are primarily approaching. Because of narrow knowledge of young professors, they occasionally instruct the students with a sort of misconceptions. During my 40 year experiences in this world as both academic authority and industrial executive, I accumulated various professors’ misconceptions. This paper reviews the top 10 among these. Initially try the following True/False tests (All are actually False). If you do not find any “False”, you are a serious patient, and you should take this tutorial course as a prescription.
In order to provide a long-term research strategies, the author present the application trends in the 21st century. Global regulations are strongly called on ecological and human health care issues, and the government-initiated technology (i.e., “politico-engineering”) has become essential. Because of significantly high energy efficiency of piezoelectrics in comparison with other actuators such as chemical engines and electromagnetic components, piezoelectric actuators have been re-focused recently in the sustainable society (i.e., “Renaissance” in piezoelectric actuators). Crisis technology applications such as earthquake detection, infrastructure monitoring, virus inspection as well as sophisticated warfare will be expanding in the market. Designing principles of ultrasonic motors, piezoelectric transformers and energy harvesting systems are briefly introduced during this presentation.
Kenji Uchino, one of the pioneers in piezoelectric actuators, is Founding Director of International Center for Actuators and Transducers, Materials Research Institute and Professor of EE and MatSE, Distinguished Honors Faculty of Schreyer Honors College at The Penn State University. He was Associate Director (Global Technology Awareness) at The US Office of Naval Research – Global Tokyo Office from 2010 till 2014. He was also the Founder and Senior Vice President & CTO of Micromechatronics Inc., State College, PA from 2004 till 2010. After being awarded his Ph. D. degree from Tokyo Institute of Technology, Japan, he became Research Associate/Assistant Professor (1976) in Physical Electronics Department at this university. Then, he joined Sophia University, Japan as Associate Professor in Physics Department in 1985. He was then recruited from The Penn State University in 1991. He was also involved with Space Shuttle Utilizing Committee in NASDA, Japan during 1986-88, and Vice President of NF Electronic Instruments, USA, during 1992-94. He was the Founding Chair of Smart Actuators/Sensors Committee, Japan Technology Transfer Association sponsored by Ministry of Economics, Trading and Industries, Japan from 1987 to 2014, and is a long-term Chair of International Conference on New Actuators, Messe Bremen, Germany since 1997. He was also the associate editor for Journal of Advanced Performance Materials, J. Intelligent Materials Systems and Structures and Japanese Journal of Applied Physics. Uchino served as Administrative Committee Member (Elected) of IEEE Ultrasonics, Ferroelectrics and Frequency Control (1998-2000) and as Secretary of American Ceramic Society, Electronics Division (2002-2003).
His research interest is in solid state physics, especially in ferroelectrics and piezoelectrics, including basic research on theory, materials, device designing and fabrication processes, as well as application development of solid state actuators/sensors for precision positioners, micro-robotics, ultrasonic motors, smart structures, piezoelectric transformers and energy harvesting. K. Uchino is known as the discoverer/inventor of the following famous topics: (1) lead magnesium niobate (PMN)-based electrostricive materials, (2) cofired multilayer piezoelectric actuators (MLA), (3) superior piezoelectricity in relaxor-lead titanate-based piezoelectric single crystals (PZN-PT), (4) photostrictive phenomenon, (5) shape memory ceramics, (6) magnetoelectric composite sensors, (7) transient response control scheme of piezoelectric actuators (Pulse-Drive technique), (8) micro ultrasonic motors, (9) multilayer disk piezoelectric transformers, and (10) piezoelectric loss characterization methodology. On-going research projects are also in the above areas, especially in the last three items (8), (9) and (10). He has authored 582 papers, 77 books and 33 patents in the ceramic actuator area. 49 papers/books among his publications have been cited more than 100 times, leading to his average h-index 71. Total citation number 27,140 and annual average citation number 560 are very high in College of Engineering.
He was also awarded his MBA degree from St. Francis University (2008), and authored a textbook, “Entrepreneurship for Engineers” for College of Business. He is a Fellow of American Ceramic Society since 1997, a Fellow of IEEE since 2012, and also is a recipient of 30 awards, including Wilhelm R. Buessem Award from the Center for Dielectrics and Piezoelectrics, The Penn State University (2019), Distinguished Lecturer of the IEEE UFFC Society (2018), International Ceramic Award from Global Academy of Ceramics(2016), IEEE-UFFC Ferroelectrics Recognition Award (2013), Inventor Award from Center for Energy Harvesting Materials and Systems, Virginia Tech (2011), Premier Research Award from The Penn State Engineering Alumni Society (2011), the Japanese Society of Applied Electromagnetics and Mechanics Award on Outstanding Academic Book (2008), SPIE (Society of Photo-Optical Instrumentation Engineers), Smart Product Implementation Award (2007), R&D 100 Award (2007), ASME (American Society of Mechanical Engineers) Adaptive Structures Prize (2005), Outstanding Research Award from Penn State Engineering Society (1996), Academic Scholarship from Nissan Motors Scientific Foundation (1990), Best Movie Memorial Award at Japan Scientific Movie Festival (1989), and the Best Paper Award from Japanese Society of Oil/Air Pressure Control (1987). He is also one of the founding members of Worldwide University Network, which encourages the linking between the UK and US multiple universities since 2001.
Electrospinning has been recognized as one of the most efficient techniques for producing non-woven fiber webs in the order of several hundreds of nanometers by electrically charging a suspended droplet of polymer solution with/without inorganic precursors or melt. Various types of materials with a high degree of porosity, a large surface area, superior mechanical properties, and modified surface functionalities, can be electrospun into nanofibrous structures. These materials include polymeric nanofibers as well as metallic and metal-oxide nanofibers which are prepared by a subsequent heat treatment in a reducing or oxidizing atmosphere of metal salt precursor/polymer composite fibers. In particular, the simplicity of the process combined with the possibility of large-scale production through the use of multiple-nozzles makes this process very attractive and therefore opens up new commercial markets for diverse applications.
In this tutorial, I will explain the fundamental operation mechanism of electrospinning as well as recent progress and a collection of advances, particularly focused on the synthesis, characterization, and utilization of electrospun functional nanofibers. These materials include metal oxide, metal nitride, and metal sulfide for broad applications.
I will end my presentation by suggesting possible future research direction and potential suitability of 3D nanofibers for applications in colorimetric sensors, exhaled breath gas analyzing sensors for early stage disease diagnosis, and energy storage materials.
The detailed presentation contents include:
1. Understanding on processing parameters in electrospinning
2. Rational designing of microstructures and morphologies of metal oxide nanofibers
3. Effective anchoring of catalytic nanoparticles onto nanofibers for selective sensing
4. Nanofiber platform for highly efficient colorimetric gas sensing
5. Recent advances in energy storage devices using electrospun nanofibers
6. 3D printing technique combined with electrospinning for customized battery design
Il-Doo Kim is Professor of Department of Materials Science and Engineering and Head of the Advanced Nanomaterials and Energy Laboratory at the Korea Advanced Institute of Science and Technology (KAIST), and the Director of Advanced Nanosensor Research (ANR) Center for KAIST Institute. He obtained his Ph.D. at KAIST in 2002 in the field of dielectric & ferroelectric thin films and experienced the postdoctoral research at Massachusetts Institute of Technology (MIT) with Prof. Harry L. Tuller. He returned to Korea Institute of Science and Technology (KIST) as a senior research scientist. In Feb. 2011, Prof. Kim joined the Department of Materials Science & Engineering of KAIST as an assistant professor, and he has been promoted to an associate professor and full professor in 2013 and 2018, respectively. He was a visiting scholar in Prof. Reginald M. Penner's group at the Department of Chemistry at UC Irvine in 2017.
Prof. Il-Doo Kim's research group is focused on novel synthesis of various inorganic nanomaterials optimized for application in ultra-sensitive chemical sensors (environmental hazardous gas detection and exhaled breath gas analysis for disease diagnosis) and high performance storage devices (Li-ion, Li-S, and Li-O2 batteries). Our research works aim at developing new synthetic methods that rely on a modified electrospinning method to produce unique nano-building blocks such as highly porous nanofibers and open tubular structures. In addition, we rationally design multi-dimensional catalyst-functionalized nanofibers, i.e., oxide, nitride, and sulfide materials, as cost-effective and highly efficient nano-catalysts. Up to date, Prof. Kim has published over 260 articles, 5 book chapters, and holds 204 international patents. Moreover, a number of patents related to nanofiber synthesis and applications have been successfully licensed to 8 companies.
Prof. Kim has been awarded the Grand Prize at the 9th KINC Fusion Research Award (2019), the Certificate of commendation by Ministry of Science and ICT (2019), won the Grand Prize of 2018 National R&D Excellence 100 Selection (2018), the Songok Science Award (2018), the KAIST Technology Innovation Grand Prize 2017 (2017), the Young Ceramist Award in the Korea Ceramic Conference (2016), the presidential award to the national industrial development through the invention promotion at the 51st invention day (2016), the International Cooperation Award in the celebration of KAIST's 45th Anniversary (2016), the Grand Prize, EEWS Business Contest Award (2016), the Excellent Lecture Award: Nano IP Enterprise Program at Seoul National University (2014), the Excellence Award in (2013) KAIST R&D 10 Selection (2013), the Leading Scientist of Emerging 100 Technologies for Korea 2020, The National Academy of Engineering of Korea (2013), the Korea Top 10 New Technology Award (Prize for Excellence, Minister of Industry and Commerce Award 2009), the Davinci Young Scientist Award (Korea Research Council of Fundamental Science & Technology 2008), and the KIST Researcher of the Month (KIST 2008).
Prof. Kim had served as a Deputy Editor in the Journal of Electroceramics and currently serves as an Associate Editor of the ACS Nano. He is a member of Young Korea Academy Science and Technology (YKAST).
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