Here is the preliminary list of invited speakers for FCSE-2017:
You will also find the biography of each individual speaker and the abstract of their respective presentation.
❯ Ahmet T. Alpas, University of Windsor, ON, Canada
Dr. Ahmet T. Alpas, professor of Materials Science and Engineering at the University of Windsor (Ontario, Canada), has joined the Department of Mechanical Automotive and Materials Engineering in 1989 following a post-doctoral fellowship appointment at McMaster University. Dr. Alpas is international leader in the area of tribology of lightweight alloys and composites through microstructural design to control materials’ properties and allow for new and efficient manufacturing methods. His transformative work consisting of more than hundred fifty publications in a peer reviewed journals and transactions has been cited over 5,700 times and forms the basis for the use of new core enabling manufacturing technologies and processes by industry. Dr. Alpas’ research initiatives have led to the establishment of a world-class centre of excellence in tribology of materials research at the University of Windsor. Dr. Alpas’ work as an Industrial Research Chair has contributed significantly to the expansion of non-traditional and innovative applications of lightweight alloys, in particular for development of efficient and durable and low friction automotive engines that feature improved fuel economy and a lesser environmental impact. He currently serves on the editorial board of the international journal of Wear. Dr. Alpas was awarded General Motors’ Campbell Award for contributions to “Fundamentals of Interfacial Tribology” and “Most Valuable Colleague Award”. Dr. Alpas’ contributions to science and engineering were also acknowledged by the University of Windsor’s Excellence in Research and Scholarship. Dr. Alpas received NSERC Synergy Award from the Governor General of Canada for contributions to lightweight automotive products and manufacturing processes.
“Carbon-based coatings for industrial applications”
A. T. Alpas, S. Bhowmick, Z. Yang, F.G. Sen, A. Banerji
Tribology of Materials Research Centre, Department of Mechanical, Automotive and Materials Engineering, University of Windsor, Windsor, ON, Canada
This talk focusses on the tribological applications of diamond-like carbon (DLC) coatings and multilayered graphene (MLG) in manufacturing of lightweight engineering components. Adhesion of softer materials to stamping dies and machining tools limit the efficiency and quality of lightweight alloy manufacturing processes. Accordingly, the need for identifying adhesion mitigating low friction coatings has become a critical topic in tribology. While the carbon-based coatings provide low adhesion surfaces that increase energy efficiency during manufacturing, their environmental stability and high temperature performances should be improved for specific applications like warm and hot forming. The study evaluates the friction reduction mechanisms and interfacial material transfer processes that occur when DLC and MLG are placed in sliding contact with aluminum and titanium alloys.
❯ Andre Anders, Lawrence Livermore Laboratory, Berkeley, CA, USA
André Anders is a Senior Scientist and Leader of the Plasma Applications Group at Lawrence Berkeley National Laboratory, Berkeley, California, and also the Editor-in-Chief of Journal of Applied Physics published by AIP Publishing. He grew up in East Germany and studied physics in Wrocław (Poland), Moscow (Russia, then Soviet Union), and Berlin, to obtain his PhD in physics from Humboldt University, (East) Berlin. After the fall of the Berlin Wall he joined Berkeley Lab in Berkeley, California, where he worked in different fields of plasma and material sciences. He has extensively published especially on cathodic arc and sputtering plasmas. His publications, including three books, have been cited approximately 12,000 times. Dr. Anders has been the recipient of several awards and was elected Fellow of the American Physical Society (APS), the American Vacuum Society (AVS), the Institute of Electrical and Electronic Engineers (IEEE), and the Institute of Physics (IoP, UK).
“Non-evaporative getter and other coatings for applications in ultrahigh vacuum”
André Anders, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Ultrahigh vacuum (UHV) is required for many applications, and coatings play an increasingly important role for both attaining UHV as well as applying processes that need to be done in UHV because high vacuum (HV) is just not good enough. A good portion of this talk is dedicated to how to achieve UHV for the next generation of synchrotron light sources based on diffraction-limited electron storage rings. The challenging part is to obtain UHV conditions in very narrow vacuum chambers with extreme aspect ratios. Narrow chambers have severe pumping speed limitations and therefore it is difficult to satisfy the ultrahigh vacuum (UHV) requirements with conventional pumps such as ion getter pumps or non-evaporative getter (NEG) cartridges. A solution to this problem is to turn the narrow vacuum chambers into vacuum pumps by NEG coatings in them. NEG materials are alloys of Ti-V-Zr, a technology originally developed at CERN. Going to very narrow chambers, less than 10 mm in diameter, pushes the envelope of this technology. Coatings in vacuum chambers as small as 6 mm in diameter with a length of 1.2 m has been demonstrated. However, for even smaller diameter chambers, wire sputtering becomes impractical, and therefore alternatives are contemplated. Besides NEG coatings, other UHV-compatible coatings are of importance to applications, for example high emissivity coatings for radiative cooling of accelerator components, and coatings that either promote or suppress the emission of secondary electrons.
Advanced coating development is supported by the Office of Basic Energy Sciences of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
❯ Ladislav Bardos, Uppsala University, Sweden
Ladislav Bardos is Professor in Electricity at the Uppsala University in Sweden and Research leader of the Plasma group at the Angstrom Laboratory. He graduated from the Czech Technical University, Faculty of Nuclear Sciences and Engineering Physics in Prague and received his PhD degree in Applied Physics from the Czech Academy of Sciences and a Doctor of Science (DrSc) degree from the Charles University in Prague. In the Institute of Plasma Physics in Prague he co-founded a new Division of Applied Plasma. In 1984 he was awarded the Czechoslovak State Prize for outstanding research results in the plasma deposition of thin films. He is author of more than 200 publications and about 30 patents. Ladislav is an active member and course lecturer in Society of Vacuum Coaters and 2010 SVC Mentor Award Recipient for his leading research in plasma processes. He is a member of the Editorial Board of Vacuum and a member of the Management Committee in the EU COST Action “Electrical discharges with liquids for future applications”. He runs a consulting company BB Plasma Design AB in plasma sources and processing technology.
“Non-conventional plasmas for reduced and high pressure processes”
Ladislav Bardos and Hana Barankova
Uppsala University, Angstrom Laboratory, Uppsala, Sweden
New challenges in modern plasma processing technologies require new types of non-equilibrium plasmas with high densities and controllable energies of interacting particles. Besides frequent employment of high frequency power generators or high power pulses there are more simple ways, where high degree of ionization can be reached due to geometrical confinement of the plasma in hollow cathodes. In this presentation different non-conventional arrangements and processing applications utilizing hollow cathodes in a broad range of gas pressures will be described, including plasma systems working at atmospheric pressure. Such systems can be applied in fast PVD or PE CVD processes, in dry etching, as well as in many gas-phase plasma-chemical processes. Principles and applications of novel plasma systems capable of operation even inside liquids will be shortly presented, too.
❯ Marcela Bilek, University of Sydney, Australia
Professor Marcela Bilek is Professor of Applied Physics at the University of Sydney. Previously she was a visiting Scientist at the Lawrence Berkeley National Laboratory, USA, a visiting Professor at the Technische Universitat Hamburg-Harburg, Germany and a Research Fellow at Emmanuel College, University of Cambridge, UK.
She has published over 270 refereed journal articles, 1 book, 4 book chapters in the field of plasma surface engineering and materials synthesis. For her work she was awarded the Malcolm McIntosh Prize for Physical Scientist of the Year (2002), ARC Federation Fellowship (2003), the Australian Academy of Science Pawsey Medal (2004) Australian Innovation Challenge Award (2011) and an ARC Future Fellowship (2012). She was elected to the Fellowships of the American Physical Society and the IEEE in 2012 and 2015, respectively.
“Hemocompatible and inherently biofunctionalisable coatings for cardiovascular stents”
M. Bilek1, M. Santos1, R. Ganesan1, D.G McCulloch2, M. Hiobb3, A. Kondyurin1, D.R. McKenzie1, A.S. Weiss3, M.K.C. Ng4, S.G. Wise4
1) School of Physics, A28, University of Sydney, NSW, 2006, Australia,
2) Applied Sciences, RMIT University, Melbourne, Victoria 3001, Australia,
3) School of Molecular Biosciences, University of Sydney, NSW, 2006, Australia,
4) Heart Research Institute, Sydney, NSW, 2042 Australia.
Cardiovascular disease is a leading cause of death and cardiovascular devices such as stents are an increasingly important treatment modality. Cardiovascular stents are made from metals to provide the mechanical strength needed to hold blood vessels open. Metals are thrombogenic so patients need to take blood thinning medication, increasing their risk of serious bleeding episodes. Metal stents typically occlude due to the inflammatory response (known as restenosis), while drug eluting stents which eliminate restenosis, impede healing of the endothelium, leading to potentially fatal late stent thrombosis.
In this work, we show that carbon-based coatings deposited using processes where substantial ion energy can be delivered to the coating during deposition provide a coating with strikingly low thrombogenicity and adhesion capable of withstanding major mechanical deformation, that is also easily functionalisable. We describe the conditions required in plasma synthesis to achieve this combination of properties and demonstrate the covalent attachment of inherently hemocompatible biomolecules to inhibit restenosis and accelerate endothelium formation. As the biofunctionalisation is achieved by a simple buffer incubation without linker chemistry the process is easily translated to practice.
❯ Eric Chason, Brown University, CT, USA
Eric Chason is a professor in the School of Engineering at Brown University. His research focuses primarily on the evolution of surfaces and thin films during materials processing. This work has led to the development of several in situ diagnostics that enable the monitoring of thin film stress, surface morphology, microstructure and interfacial reactions. This includes the development of a multi-beam optical technique (MOSS) for monitoring stress evolution in situ during processing. Recent projects include residual stress in polycrystalline films, whisker formation in Sn, anodes for Li-ion batteries and ion-induced surface nano-patterning. Before moving to Brown in 1998, he was a senior member of the technical staff at Sandia National Laboratories in Albuquerque. He received his Ph.D. degree in physics in 1985 from Harvard University.
“Relating thin film stress to the processing conditions and microstructure”
Brown University, School of Engineering, Providence RI USA
Thin films often develop residual stress while they are being grown with a magnitude that can be large enough to cause film failure by delamination, cracking, etc. The amount of stress depends on the processing conditions and also on the film’s microstructure. A better understanding of the origins of film stress would enable us to predict and control it. We present experimental results and modeling that attempt to provide a quantitative understanding of stress evolution during film growth. To determine the dependence on growth conditions, we have performed real-time stress measurements using a wafer curvature technique. Cross-sectional measurements after the growth enable us to determine the grain size at different stages of the growth. The model is based on describing the different stress-generating kinetic processes occurring during growth of polycrystalline films. We show how the model is able to explain the observed dependence on temperature, growth rate and microstructural evolution in several different studies. We also describe how the model can be extended to include the effects of energetic deposition processes (sputtering) on stress.
❯ Diederik Depla, Ghent University, Belgium
Prof. Dr. D. Depla has received his Master Degree in Chemistry in 1991 at Ghent University (Belgium). In 1996 he promoted with a PhD thesis in Solid State Chemistry on spray drying of precursors for superconductors. After a short period as senior scientist in the Department of Solid State Sciences, he became in 1999 Professor at the same department. His research focuses on the fundamental aspects of reactive magnetron sputter deposition. He has shown the importance of ion implantation on this process, and explained the discharge voltage behavior during reactive sputter deposition. In this way, his continuous research in this area resulted in several publications. He is now head of the research group “Dedicated research on advanced films and targets (DRAFT)” in the same department. More details can be found on www.draft.ugent.be.
“Some answers and a million of questions about reactive magnetron sputtering”
D. Depla, K. Strijckmans, R. Schelfhout
Ghent University, Belgium
Magnetron sputtering is a mature technique for the deposition of thin films, both at laboratory and industrial level. Conceptually, the technique is quite simple and the process can be summarized in a few lines. But this apparent simplicity quickly vanishes, when one aims to model the process. The RSD model developed within the research group DRAFT reveals that reactive sputter deposition is a complex interplay between different physical and chemical processes. At the target, different processes such as chemisorption, knock-on and direct ion implantation, and re-deposition influence the target condition as a function of the reactive gas flow. A detailed description of these processes, together with the strategies to get quantitative input parameters, will form the first part of the talk. In the second part of the talk, some modelling results for DC magnetron sputtering and HiPIMS will be discussed.
The authors hope to provide at least some answers to the attendees’ questions. However, we also hope that the talk will puzzle the attendees. Indeed, with the RSD model we aim, as mentioned by Samuel Karlin, for a model that not (only) fits the data, but also sharpens the questions.
❯ Gary Doll, University of Akron, OH, USA
Gary Doll is the Timken Professor of Surface Engineering and the Director of the Timken Engineered Surfaces Laboratories at the University of Akron. He holds joint appointments in the Civil Engineering, Mechanical Engineering, and Chemical and Biomolecular Engineering Departments. He received his Ph.D. in Condensed Matter Physics from the University of Kentucky where he studied the optical and structural properties of layered materials, including alkali-metal doped polyacetylene with coauthor and Nobel Laureate A. G. MacDiarmid. Based upon his graduate research, he was awarded a postdoctoral fellowship in Physics at the Massachusetts Institute of Technology with Prof. M. S. Dresselhaus, where he began his research into the deposition and characterization of thin films – specifically group III-N and copper oxide superconductors. After MIT, he joined the General Motors Research Laboratories where he continued his research in thin film coatings, surface engineering, and tribology. His research at GM led to advancements in the deposition of cubic boron nitride and the first commercial development and implementation of tribological coatings on automotive gears. In 1996, he became the Chief Technologist of Tribology at the Timken Company where he was responsible for global research and development activities in tribology, lubrication, surface engineering, and non-ferrous materials. His group at Timken developed the award winning ES302 diamondlike carbon coating that enabled the launch of the world’s most wear resistant rolling element bearings. Dr. Doll retired from Timken and became the Timken Professor of Surface Engineering at the University of Akron in 2011. In addition to his normal faculty responsibilities, Prof. Doll is also the Director of the Timken Engineered Surfaces Laboratories (TESL) and the Center for Surface Engineering and Lubrication Research (CSELR). At the University of Akron, he has continued his research in thin film coatings for tribological applications, specifically focusing upon developing thin film solutions to surface initiated wear of mechanical systems. He was elected as an ASM Fellow in 2009, and an STLE Fellow in 2016 for his contributions to the field of Surface Engineering. He is a member of the SVC, STLE, ASME, and the ASM International organizations, and is an associate editor for Tribology Transactions. In 2016, he was awarded a Distinguished Fellowship by the Royal Academy of Engineering. Over his career, Dr. Doll has published over 300 articles and book chapters, edited numerous proceedings, received more than 25 US Patents, and has a citation index of 32.
“Wear and corrosion resistant coatings for demanding environments”
B. Strahin1, D. Shreeram2, and G. L. Doll1,2
1) Department of Mechanical Engineering, The University of Akron, Akron OH USA 44325
2) Department of Chemical and Biomolecular Engineering, The University of Akron, Akron OH USA 44325
Mechanical systems that function in agricultural, construction, and mining and mineral processing applications for example often operate in abrasive, corrosive, and/or boundary lubrication environments. Consequently, the operational periods of mechanical components in these applications are usually much less than their designed and desired lifetimes. Surface treatments in the form of thin film coatings can sometimes increase the lives of mechanical components that must operate in demanding environments. Examples of coatings that have significantly improved the performance of steel mechanical components that operate in boundary lubrication are the families of diamondlike carbon (DLC) and dichalcogenides (e.g., MoS2), which are applied by vacuum deposition processes. However, these coatings do not usually function well in highly abrasive and/or corrosive environments. Metal carbide coatings applied by thermal reactive diffusion, and metallic coatings applied by electrodeposition can sometimes offer substantial improvements to component performance when operating in abrasive and/or corrosive environments, but do not perform nearly as well as DLC in boundary lubrication environments. This presentation shall review the properties and performances of some of the more successful thin film coatings that have been developed and utilized in demanding environments.
❯ Ali Erdemir, Argonne National Laboratory, Argonne, IL, USA
Dr. ALI ERDEMIR is a Distinguished Fellow and a Senior Scientist at Argonne National Laboratory with international recognition and significant accomplishments in the fields of materials science, surface engineering, and tribology. He received his B.S. degree from Istanbul Technical University in 1977 and M.S. and Ph.D. degrees in Materials Science and Engineering from the Georgia Institute of Technology in 1982 and 1986, respectively. In recognition of his pioneering research, Dr. Erdemir has received numerous coveted awards and honors, including the University of Chicago’s Medal of Distinguished Performance, six R&D 100 Awards, Mayo D. Hersey Award of ASME, two Al Sonntag Awards and an Edmond E. Bisson Award from the Society of Tribologists and Lubrication Engineers (STLE). He is a Fellow of ASME, STLE, AVS, and ASM-International. He has authored/co-authored more than 300 research articles (240 of which are peer-reviewed) and 18 book/handbook chapters, edited three books, presented more than 160 invited/keynote/plenary talks, and holds 17 U.S. patents. His current research is directed toward nano-scale design and large-scale manufacturing of new materials, coatings, and lubricants for a broad range of applications in transportation, manufacturing, and other energy conversion and utilization systems.
“Re-engineering of tribological interfaces toward more efficient and green transportation technologies”
Argonne National Laboratory, Energy Systems Division, Argonne, IL, USA
About one-third of the fuel’s energy in our car’s engine is still consumed by friction, and on average, only about 20% of the total energy is actually used to move our cars. Globally, transportation sector accounts for about 20% of the world’s energy consumption and some 23% of total greenhouse-gas emissions every year. In this talk, I will survey some of the latest trends in surface engineering which can ultimately lead to more efficient and green transportation technologies. In particular, diamonlike carbon films have made significant positive impact on efficiency and environmental compatibility of current engines. Along these lines, we have been persistently designing, developing, and implementing superlow-friction materials and coatings with great success in our lab and quite recently pioneered the development of a new breed of nanocomposite coatings that are able to extract their own diamondlike carbon tribofilms in-situ and directly from the hydrocarbon molecules of lubricating oils to provide some of the lowest friction and wear coefficients. Overall, development and implementation of these and other emerging technologies will be crucial for a sustainable transportation future that is also environmentally desirable.
❯ Joseph E. Greene, University of Illinois at Urbana-Champaign, IL, USA
Joe Greene is the D.B. Willett Professor of Materials Science and Physics at the University of Illinois, the Tage Erlander Professor of Materials Physics at Linköping University, Sweden, and a Chaired Professor at the National Taiwan University of Science and Technology. The focus of his research has been the development of an atomic-level understanding of adatom/surface interactions during the dynamic process of vapor-phase crystal growth in order to controllably manipulate nanochemistry, nanostructure, and, hence, physical properties. His work has involved nanoscience and film growth by all forms of sputter deposition, solid and gas-source MBE, UHV-CVD, MOCVD, and ALE. Joe has published more than 550 papers and review articles, 28 book chapters, and co-edited 4 books in the general areas of crystal growth, thin-film physics, and surface science. In particular, he has used hyperthermal condensing species and UV photochemistry for probing as well as stimulating surface reactions that do not proceed thermally. Joe has presented over 500 invited talks and 100 Plenary Lectures at international meetings.
He is currently Editor-in-Chief of Thin Solid Films and past Editor of CRC Critical Reviews in Solid State and Materials Sciences. He is active in the AVS where he has served on the Trustees, twice as a member of the Board of Directors, as President of the society in 1989, and is currently Secretary. He has also Chaired the AVS Thin Film and Advanced Surface Engineering Divisions, the IUVSTA Education and Thin Film Committees, and served on the Governing Board of the American Institute of Physics and the Executive Committee of the APS Division of Materials Physics. He is currently the US representative to the International Union of Vacuum Science and Techniques and is serving on the Executive Committee of ASED.
“Evening lecture: Tracing the Recorded History of Thin-Film Sputter Deposition: from the 1800s to 2017″
D.B. Willett Professor of Materials Science and Physics, University of Illinois
Tage Erlander Professor of Physics, Linköping University, Sweden
University Professor of Materials Science, National Taiwan Univ. Science & Technology
Thin films, ubiquitous in today’s world, have a documented history of more than 5000 years. However, thin-film growth by sputter deposition, which required the development of vacuum pumps and electrical power in the 1600s and 1700s, is a much more recent phenomenon. First reported in the early 1800s, sputter deposition already dominated the optical-coating market by 1880. Preferential sputtering of alloys, sputtering of liquids, multi-target sputtering, and optical spectroscopy for process characterization were all described in the 1800s. Measurements of threshold energies and yields were carried out in the late 1800s, and results in reasonable agreement with modern data were reported in the 1930s. Roll-to-roll sputter coating on flexible substrates was introduced in the mid-1930s and the initial demonstration of sustained self-sputtering (i.e., sputtering without gas) occurred in 1970.
The term magnetron dates to 1921 and the results of the first magnetron sputtering experiments were published in the late 1930s. The earliest descriptions of a parallel-plate magnetron were provided in a patent filed in 1962, rotatable magnetrons appeared in the early 1980s, and tunable “unbalanced” magnetron sputtering was developed in 1992. Two additional forms of magnetron sputtering evolved during the 1990s, both with the goal of efficiently ionizing sputter-ejected metal atoms: ionized-magnetron sputtering and HiPIMS, the later now available in several variants.
rf glow discharges were reported in 1891, with the initial results from rf deposition and etching experiments published in the 1930s. Modern capacitively-coupled rf sputtering systems were developed and modeled in the early 1960s and a patent was filed in 1975 that led to pulsed-dc and mid-frequency-ac sputtering.
The purposeful synthesis of metal-oxide films goes back to at least 1907, leading to early metal-oxide and nitride sputtering experiments in 1933, although the term “reactive sputtering” was not used in the literature until 1953. The effect of target oxidation on secondary-electron yields and sputtering rates was reported in 1940. The first kinetic models of reactive sputtering appeared in the 1960s; high-rate reactive sputtering, based on partial-pressure control, was developed in the early 1980s.
While abundant experimental and theoretical evidence already existed in the late 1800s to early 1900s demonstrating that sputtering is due to momentum transfer via ion-bombardment-induced near-surface collision cascades, the concept of sputtering resulting from local “impact evaporation” continued in the literature into the 1960s. Modern sputtering theory is based upon a linear-transport model published in 1969.
No less than eight Nobel Laureates in Physics and Chemistry played major roles in the evolution of modern sputter deposition.
❯ Jeon G. Han, Sungkyunkwan University, Suwon, South Korea
Jeon Geon Han is the director of the Excellency Center for Advanced Plasma Surface Technology (CAPST) and a Professor at the School of Advanced Materials Science and Engineering of the Sungkyunkwan University (SKKU) in South Korea.
He received his Ph.D. in Materials Engineering in 1985 from the Georgia Institute of Technology, U.S.A. In 1987, he was appointed an Assistant Professor, and later promoted to Associate professor in Department of Metallurgical Engineering, and subsequently, become a professor in the School of Advanced Materials Science and Engineering in the year 1996, at SKKU. His main interest has been based on the fundamental design and synthesis of next-generation multifunctional film materials, development of advanced plasma surface and film processes using novel plasmas, biomedical, and engineering applications of nanomaterials in the industry, development of novel plasma sources, studies on plasma discharges, development of plasma diagnostics especially for plasma processing, etc.
During 1985-1986, he was a Research Associate of the Georgia Institute of Technology. Since then he has worked on novel plasma deposition technology, focusing on the fundamentals of both plasma, as well as on the surface processes occurring in plasma processing of functional materials. He specializes in applying new advanced plasma sources and diagnostics for plasma species detection as well as in situ analysis and control of the physical and chemical properties of the materials processed. He has authored and co-authored over 300 papers in peer-reviewed international and national journals and is the co-inventor of > 60 patents.
He serves on numerous scientific and advisory committees of international conferences and presents more than 50 invited and scientific talks in various places across the world. He has been actively involved and consulted for several Industries and research organizations. He is a committee member of KVS, and Surface Technology Division of National Projects of Korean Government and has served as a President of Korea Institute of Surface Engineering in 2006-2008, as a Head of Institute of Industrial Vacuum Technology in 1998-2000, and as a Director of Korea-Germany Cooperation Project on Vacuum and Plasma Technology in 1999-2001. He has been serving as an executive committee member of surface engineering division, IUVSTA since 2010.
As an eminent expert in the advanced and applied field, he was the Editor in the special proceedings of international conferences to Surface Coatings and Technology and Thin Solid Films (1998, 2002, 2003). He has also served as a guest editor for the special issues of the AEPSE 2015 conference for the Journal Surface and Coatings technology. Also, he is an active reviewer of several Journal series but not limited to AIP, IOP, IEEE, RSC, and Elsevier.
He is also the recipient of Sungkyunkwan University’s “Best Professor Fellowship”, the “President award of Republic of Korea-2006”, and “Honorary doctor-2015, Chiangmai University, Thailand”.
“High rate synthesis of self assembled Si quantum dots using radical and plasma control in RF/UHF high density plasmas at low temperature”
Jeon G. Han and Bibhuti B. Sahu
Center for Advanced Plasma Surface Technology (CAPST), NU-SKKU Joint Institute for Plasma Nano Materials (IPNM), Department of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, South Korea.
The discovery of light emission in nanostructured silicon has opened up new avenues of research in nano-silicon based devices. One such pathway is the application of silicon quantum dots in advanced photovoltaic, light emitting, and optoelectronic devices. Recently, there is increasing interest on the silicon nanocrystals familiar as Si quantum dots embedded in an amorphous dielectric matrix. However, due to the limitation of the requirement of a very high deposition temperature along with post annealing and a low growth rate, extensive research are being undertaken to elevate these issues, for the point of view of applications, using plasma assisted deposition methods by using different non-thermal plasmas. Different plasma parameters like electrons, ions, radical species and neutrals play a critical role in nucleation and growth and corresponding film microstructure as well as plasma-induced surface chemistry. Consequently, there is the necessity of the integrated studies on the fundamental physical properties that govern the plasmas seek to determine their surface structure and modification capabilities under specific experimental conditions. The purpose of this contribution is to study and extend analysis using advanced plasmas and dedicated plasma diagnostics to optimize and in-situ monitoring of the deposition process. Plasma enhanced chemical vapour deposition technique using radio frequency (RF) and ultra-high frequency (UHF) dual frequency power is utilized for the single step deposition of Si QD embedded in amorphous hydrogenated amorphous silicon nitride (a-SiNx: H) at a low-temperature. Experimental observation reveals that a high plasma density along with high-densities of atomic H and N is very crucial for the control of film properties and the QD size. Small-to-big sized Si QDs in the range of 3.5 to 18 nm are fabricated using a reactive mixture of ammonia/silane/hydrogen utilizing dual-frequency capacitively coupled plasmas that can generate very high atomic H and N radical densities by the electron impact dissociation due to the presence of very high density plasmas. Systematic data analysis using different film and plasma characterization tools reveals that the quantum dots with different sizes exhibit size dependent film properties, which are sensitively dependent on plasma characteristics. Additionally, these films exhibit intense photoluminescence in the visible range with violet to orange colors and with narrow to broad widths (~ 0.3–0.9 eV). The present results are highly relevant to the development of the next-generation plasma process for devices that rely on effective control of the QD size and film properties.
1. B. B. Sahu, Y. Yin, S. Gauter, J. G. Han, and H. Kersten, Phys. Chem. Chem. Phys. 18, 25837 (2016).
2. B. B. Sahu, Y. Yin, J. G. Han, and M. Shiratani, Phys. Chem. Chem. Phys. 18, 15697 (2016).
3. B. B. Sahu, Y. Yin, J. S. Lee, J. G. Han, and M Shiratani, J. Phys. D: Appl. Phys. 49, 395203 (2016).
❯ Stéphane Kéna-Cohen, Polytechnique Montréal, Montréal, QC, Canada
Stéphane Kéna-Cohen is an Assistant Professor of Engineering Physics at Polytechnique Montréal and the Canada Research Chair in Hybrid and Molecular Photonics. He is known for his work on organic polaritons: hybrid light-matter particles that exist in optical microcavities. He has produced a number of important results in this field such as demonstrating the first organic polariton laser and observing room-temperature superfluidity of exciton-polaritons. He also pioneered some of the first observations of the quantum behaviour of surface plasmon-polaritons. At Polytechnique, Prof. Kéna-Cohen’s group is actively working on the development of new families of optoelectronic devices for applications in quantum information, biophotonics and solar energy. He obtained his PhD in 2010 at Princeton University under the supervision of Stephen Forrest and prior to joining Polytechnique, he held a Junior Research Fellowship at Imperial College London.
“Functional organic and metallic films for optoelectronics”
Stephane Kéna-Cohen, Polytechnique Montréal, Montreal, QC, Canada
Functional optical coatings play an essential role in optoelectronics and can be useful for quantum information processing. We will discuss advances in two broad classes of materials: organic semiconductors and metallic thin films. We will first discuss strategies for the deposition of ultrathin continuous gold and silver films using self-assembled organic monolayers. These resulting films can have better transparency and sheet resistance than indium tin oxide, for use as transparent contacts, while also possessing advantageous mechanical properties. We will show how such films can be used to design simplified low-emissivity filters, light-emitting diodes and nanophotonic waveguides. In particular, we will highlight recent results where our use of metallic thin films on self-assembled monolayers allowed for the fabrication of multi-layered plasmonic structures for quantum information processing.
Then we will discuss new possibilities for using dielectric multilayers within organic light-emitting diodes and organic lasers to unveil new functionality. We will show how optimization techniques can be used to control near-field and far-field radiation patterns of light-emitting diodes and how optical confinement can be used to create new hybrid light-matter particles called polaritons. Finally, we will show some of the exotic phenomena recently demonstrated in our group using polaritons such as polariton lasing and room-temperature superfluidity.
❯ Paul Mayrhofer, Technische Universität Wien, Vienna, Austria
Paul Mayrhofer is University Professor of Materials Science at the Institute of Materials Science and Technology, Technische Universität Wien, TU Wien, since 2012. Paul is also Guest Professor at the Central South University, Changsha, Hunan (China). He received a Ph.D. in 2001 and Habilitation in 2005 in Materials Science at the University of Leoben. Paul spent his post-doc and Erwin-Schrödinger-Fellowship at University of Illinois at Urbana-Champaign, RTWH Aachen, and Linkoping University. His research activities focus on the development and characterization of vapor phase deposited nanostructured materials by a combination of computational and experimental material science. He has pioneered age hardening within hard ceramic thin films based on ternary nitrides and borides and given more than 40 invited presentations (including plenary and key note lectures). Paul is member of the Young Academy of the Austrian Academy of Sciences, President of the Austrian Vacuum Society, and Editor for the Elsevier Journal Vacuum. At TU Wien he also is Dean of Academic Affairs at the Faculty Mechanical and Industrial Engineering and chairs the Master Study Program for Materials Science.
“Innovative ceramic-like coatings for tooling, machining, aerospace, energy and automotive industry”
Paul Mayrhofer, Technische Universiaet Wien, Austria
This work summarizes recent developments on applying thin film structure and architecture concepts to hard coatings for optimized performance in various application fields. Hard coatings deposited by plasma-assisted vapour deposition are widely used to reduce friction and wear of tools and engineering components in energy, automotive and aerospace industry.
We will look in more detail into the correlation between microstructure and mechanical and thermal properties of hard ceramic coatings (like Ti-Al-N, Cr-Al-N, Mo-Al-N, Ta-Al-N and combinations thereof). Their microstructure can be designed by choice of the deposition techniques (understanding the growth processes taking place, sequential deposition of layers or self-organization processes) or by thermally induced self-organization. Furthermore, the superlattice effect on hardness and toughness will be discussed in detail and how a multilayer arrangement can significantly improve the thermal stability.
❯ Susan Sinnott, University of Pennsylvania, PA, USA
Susan B. Sinnott received her B.S. in chemistry from the University of Texas at Austin and her Ph.D. in physical chemistry from Iowa State University. She was a National Research Council Postdoctoral Associate at the Naval Research Laboratory and was on the faculty at the University of Kentucky prior to joining the University of Florida in 2000. In 2015 Susan joined the Pennsylvania State University as Professor and Department Head of Materials Science and Engineering. Research in the Sinnott Group is focused on the application of computational methods at the electronic-structure and atomic scales to examine a variety of materials and processes. These include the design of new materials and the investigation of the influence of grain boundaries, point defects, dopants, and heterogeneous interfaces on material properties.
A major area of emphasis is the development of inventive methods to enable the modeling of new material systems at the atomic level. Susan is the author of over 220 technical publications, including over 200 refereed journal publications and 8 book chapters. She is a Fellow of the Materials Research Society, American Physical Society, American Ceramic Society, American Vacuum Society, and of the American Association for the Advancement of Science. Susan is a past President of the American Vacuum Society and is the Editor-in-Chief of Computational Materials Science.
“Quantification of structure-property relationships at interfaces”
Susan B. Sinnott
Penn State University, University Park, PA, USA
The role of coatings described in this presentation is considered for providing functionality, lubrication, and protection to material surfaces. The focuswill be on providing an atomic-level understanding of the structure-property relationships that control the performance at material interfaces. A computational approach is used at the level of many-body, classical atomistic simulations of the structure of coherent and semicoherent interfaces formed between TiC (111) and Ti (0001). A two-dimensional misfit dislocation network is predicted to form in the case of the semicoherent interfaces, the properties of which are predicted to change with temperature. Additionally, the properties of the interface of various orientations of Pt with oxidized Pt are explored. The simulations provide insights into the performance of heterogeneous material interfaces that are helpful for interpreting macroscopic behaviors.
❯ Manu A. Subrahmanyam, Indian Institute of Technology Madras, Chennai, India
Dr. A. Subrahmanyam (Manu) is Professor in the Department of Physics, Indian Institute of Technology Madras, Chennai, India. He graduated from the Physics Department of Indian Institute of Technology (IIT) Kharagpur in 1980 and joined the Physics Department, IIT Madras in 1982. He has been awarded an Young Scientists Fellowship (BOYSCAST) by the Department of Science and Technology, Government of India in 1988; Humboldt Fellowship in 1989, Saint Gobain Chair in 2009 and DAAD Professor in TU Dresden in 2009-2010. He has established a laboratory for metal oxide thin films and surface engineering. Over the past ten years, his research efforts are on bio-medical engineering: development of lung assist devices (using the principles of photocatalysis) and on early warning systems in mechanical heart valve failures (executed an Indo – European project on mechanical heart valves). He has designed and developed Kelvin probe equipment for surface engineering and authored the first book and six patents. His teaching experience spans over 35 years. He has guided 17 doctoral theses, published over 160 papers in international peer reviewed journals, and executed 38 sponsored research projects funded both by the Government of India and various Multinational companies. He is member of the editorial board for Solar Energy Materials and Solar Cells, an Elsevier Journal.
“Advances in non-destructive surface and interface analyses using the Kelvin Probe”
Indian Institute of Technology Madras, Chennai, India
The surface of metals and semiconductors, though advanced on technology-front, still pose unique challenges in their understanding. Most of the versatile analytical surface analytical techniques give abundant information but the tools do modify the surfaces. The Kelvin probe is a most powerful non-contact and non-destructive analytical tool for surface engineering of the metal and semiconductor surfaces; the surface remains virgin even after the measurement. The Kelvin probe technique measures the surface work-function. The surface work-function is very sensitive to the surface preparation, surface adsorption / absorption kinetics of reactive gases leading to oxidation or reduction. The technique has the unique advantage to follow the real time changes that are taking place on the surface. The interfaces can also be analysed with Kelvin probe, known as Surface Photo-voltage (SPV) spectroscopy, by exciting the states in the interface with suitable wavelengths. The Kelvin technique can be employed both in ultrahigh vacuum and in the ambient. The Kelvin probe technique is so versatile, it is being used in the understanding of electronic behaviour of surfaces of metals and semiconductors, mechanical and tribological properties, interfacial phenomena, adhesion, corrosion, photovoltaic junction analysis, photocatalytic activity, electro-chromic behaviour, surface defects and morphology and bacterial biofilm adherence etc,. The present work summarises the recent advances in the Kelvin probe to explore new areas, including the corrosion in (or failure of) bio-medical implants.