The ALS holds seminars regularly, both as part of our colloquium series and on an ad hoc basis. This page lists all seminars that are part of our colloquium. To receive notifications of all seminars, please email [email protected] to request to be added to the distribution list.
UEC Seminar Series: Science Enabled by ALS-U
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APRIL 2Hélio C. N. Tolentino, Brazilian Synchrotron Light Laboratory (LNLS)12:10–1:00 pm Science Program Using Coherent X-Rays at the Sirius-LNLS Synchrotron Source I will show a brief overview of the Sirius source connected to the IDs for delivering highly coherent X-rays and an overview of the beamlines that are somehow developing techniques related to use of coherence. I will then present the science areas that we are planning to tackle and the local infrastructure that have been developed. Helio Tolentino has been a researcher at the Brazilian Synchrotron Light Laboratory (LNLS), one of the national labs of the Brazilian Center for Research in Energy and Materials (CNPEM) in Campinas, SP, Brazil, since 2014. He has also served as Head of the Heterogeneous and Hierarchical Matter Division (DMH) of the LNLS since 2020. Since 2015, he has coordinated the project and construction of the Carnaúba (X-ray nanoprobe) beamline for the new Brazilian synchrotron light source, Sirius. Its main research interests are in the physics and chemistry of condensed matter systems, with emphasis in heterogeneous and hierarchical materials for energy and photonics, and in the development of synchrotron radiation instrumentation for the study of several materials at the nanoscale. |
MAY 7Maik Kahnt, MAX IV (Sweden)Title: TBD |
Winter 2020 Colloquium Series
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FEBRUARY 19Michal Bajdich, SLAC National Laboratory3:00–4:00 pm, Room 15-253 Computational Catalysis and Machine Learning for Sustainable Energy
Fueling the planet with clean and sustainable energy is one of the central challenges of the 21st century. At the center of these technologies are energy transformations facilitated by catalytic processes. The largest breakthrough is needed in the electrochemical catalysis of water, oxygen and CO2 reduction, where the active, stable, and earth-abundant catalysts are yet to be discovered. In my talk, I will discuss latest approaches developed at the SUNCAT Center, SLAC to address the above challenges. Particularly, I will highlight the role of theory in explaining the mechanism of reduction of CO2 to CO in Solid-Oxide Fuel-Cells [1], as observed by operando-XPS performed at ALS (see also ALS News: https://als.lbl.gov/new-catalyst-resists-destructive-carbon-buildup-in-electrodes/). Next, I will show how theory can leads us to understanding the local coordination environments of single-atom catalysts recently observed by in situ electrochemical cell XAS. Both, the experimental and theoretical challenges remain in the identification of active phases and mechanisms under reaction conditions. For that reason, I will show how Active Machine Learning applied to a bulk prototype space can lead to accelerated discovery of stable and active phases and how catalysis research efforts across the globe can by scaled-up with our computational catalysis repository: Catalysis-hub.org [2]. [1] Skafte, T. L.; Guan, Z.; Machala, M. L.; Gopal, C. B.; Monti, M.; Martinez, L.; Stamate, E.; Sanna, S.; Garrido Torres, J. A.; Crumlin, E. J; Bajdich, M.; Chueh, W., Graves, C.; Selective High-Temperature CO2 Electrolysis Enabled by Oxidized Carbon Intermediates. Nat. Energy 2019, 1–10. https://doi.org/10.1038/s41560-019-0457-4. [2] Winther, K. T.; Hoffmann, M. J.; Boes, J. R.; Mamun, O.; Bajdich, M.; Bligaard, T. Catalysis-Hub.Org, an Open Electronic Structure Database for Surface Reactions. Sci. Data 2019, 6 (1), 75. https://doi.org/10.1038/s41597-019-0081-y.Biography Dr. Michal Bajdich started his career in 2009 as the Postdoctoral Fellow, Materials Theory Group, Oak Ridge National Laboratory, where he worked on quantum Monte Carlo methods for accurate electronic structure calculations and general supercomputing applications. In 2011, he moved to Lawrence Berkeley National Laboratory to be part of the Joint Center for Artificial Photosynthesis—center with the goal of creating solar fuels— where his is involved to present day. Since 2013, Dr. Bajdich has been a part of the SUNCAT Center for Interface Science and Catalysis at SLAC National Accelerator Laboratory and Department of Chemical Engineering at Stanford University. Dr. Bajdich is interested in the application of ab-initio computational methods for understanding and discovery of electrocatalysis, with special focus on earth-abundant metal-oxides and related materials. He also works on the development of theoretical models for electrochemistry and XAS spectroscopy. Recently, he started applying catalysis informatics and machine learning tools to catalysts discovery. He is an author of more than 60 publications, 2 book chapters, and his work received more than +4000 citations. He is a co-founder of Catalysis-hub.org and a member of AICHE programming committee, and many of other professional societies. Dr. Bajdich has received his Ph.D. in Physics in 2007 from North Carolina State University, USA. He earned his master’s degree in Physics, Comenius University, Bratislava, Slovakia. |
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FEBRUARY 26Jordi Cabana, University of Illinois at Chicago3:00–4:00 pm, Room 15-253 Advances in X-Ray Microscopy for the Study of Battery Reactions in Single Particles Abstract The existing performance limitations of Li-ion batteries can be tracked to slow kinetics and irreversibilities in the chemical changes undergone by the electrode materials.Tools that provide insight into the onset and propagation of these transitions are critical for identifying the underpinnings of electrochemical function.This information must be generated at the nanoscale because reaction kinetics and irreversibilities at the level of individual particles determine macroscopic metrics and trigger architecture degradation, respectively.Synchrotron-based X-ray microscopy currently combines nanoscale spatial resolution with a suite of possible contrasts mechanisms, such as diffraction and spectroscopy.In this talk, I will discuss recent research geared toward the chemical imaging of electrochemical reactions in battery electrodes, focusing on single particles. While the focus will be on established Li-ion systems, examples of batteries based on Mg will also be discussed. I will highlight the new fundamental insight generated by the tools, including time-resolved phenomena using operando measurements. These measurements avoid relaxation of components from the kinetically controlled functional state to one that is more stable under open circuit conditions. The mechanisms of transformation will be related to their impact on material and architecture properties. I will also provide a glimpse into the future by showing how emerging synchrotron techniques can enhance the impact of X-ray microscopy in fundamental battery science. Biography Jordi Cabana is an Assistant Professor at the Department of Chemistry of the University of Illinois at Chicago. Prior to his appointment at UIC, he was a Research Scientist at Lawrence Berkeley National Laboratory (USA), from 2008 until 2013. Prof. Cabana completed his Ph.D. in Materials Science at the Institut de Ciència de Materials de Barcelona (Spain) in 2004, and worked in the Department of Chemistry at Stony Brook University (USA) as a postdoctoral associate. He is generally interested in the electrochemistry of inorganic materials, with emphasis on redox and transport properties. |
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MARCH 11Claudia Felser, Max Planck Institute for Chemical Physics of Solids3:00–4:00 pm, Room 15-253 Magnetic Weyl Semimetals! Abstract Claudia Felser1, Kaustuv Manna1, Enke Lui1 and Yan Sun1 1Max Planck Institute Chemical Physics of Solids, Dresden, Germany (e-mail: [email protected]) Topology a mathematical concept became recently a hot topic in condensed matter physics and materials science. One important criteria for the identification of the topological material is in the language of chemistry the inert pair effect of the s-electrons in heavy elements and the symmetry of the crystal structure [1]. Beside of Weyl and Dirac new fermions can be identified compounds via linear and quadratic 3-, 6- and 8- band crossings stabilized by space group symmetries [2]. In magnetic materials the Berry curvature and the classical AHE helps to identify interesting candidates. Magnetic Heusler compounds were already identified as Weyl semimetals such as Co2YZ [3,4], in Mn3Sn [5,6,7] and Co3Sn2S2 [8-10]. The Anomalous Hall angle helps to identify even materials in which a QAHE should be possible in thin films. Besides this k-space Berry curvature, Heusler compounds with non-collinear magnetic structures also possess real-space topological states in the form of magnetic antiskyrmions, which have not yet been observed in other materials [11]. [1] Bradlyn et al., Nature 547 298, (2017) arXiv:1703.02050 [2] Bradlyn, et al., Science 353, aaf5037A (2016). [3] Kübler and Felser, Europhys. Lett. 114, 47005 (2016) [4] I. Belopolski, et al., Science in print (2019), arXiv:1712.09992 [5] Kübler and Felser, EPL 108 (2014) 67001 (2014) [6] Nayak, et al., Science Advances 2 e1501870 (2016) [7] Nakatsuji, Kiyohara and Higo, Nature 527 212 (2015) [8] Liu, et al. Nature Physics 14, 1125 (2018) [9] D. F. Liu, et al., Science in print (2019) [10] N. Morali, et al., Science in print (2019) arXiv:1903.00509 [11] Nayak, et al., Nature 548, 561 (2017) Biography Claudia Felser studied chemistry and physics at the University of Cologne (Germany, completing there both her diploma in solid state chemistry (1989) and her doctorate in physical chemistry (1994). After postdoctoral fellowships at the Max Planck Institute in Stuttgart (Germany) and the CNRS in Nantes (France), she joined the University of Mainz (Germany) in 1996 becoming a full professor there in 2003. She is currently Director at the Max Planck Institute for Chemical Physics of Solids in Dresden (Germany). Her research foci are the design and discovery of novel inorganic compounds, in particular, Heusler compounds for multiple applications and new topological quantum materials. In 2011 and again in 2017, she received an ERC Advanced grant. Felser was honored as a Distinguished Lecturer of the IEEE Magnetics Society, she received the Alexander M. Cruickshank Lecturer Award of the Gordon Research Conference, a SUR-grant Award from IBM and the Tsungmin Tu Research Prize from the Ministry of Science and Technology of Taiwan, the highest academic honor granted to foreign researchers in Taiwan. In 2019, Claudia Felser was awarded the APS James C. McGroddy Prize for New Materials together with Bernevig (Princeton) and Dai (Hongkong). She is a Fellow of the American Physical Society and the Institute of Physics, London. In 2018, she became a member of the Leopoldina, the German National Academy of Sciences, and acatech, the German National Academy of Science and Engineering. |
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**TUESDAY** MARCH 17Sayeef Salahuddin, UC Berkeley**4:00–5:00 pm**, Room 15-253 Negative Capacitance, Ultra-thin Ferroelectrics and Applications Abstract The physics of ordered and correlated systems allows for fundamental improvement of energy consumption, going beyond what is possible with conventional materials. One such example is the class of materials with polar distortion such as a (anti)ferroelectric, where thermodynamics dictate that charge can be switched with much lower energy compared to conventional dielectrics. In these materials the internal order leads to a state of negative capacitance, which results in a boost of internal electric fields and charge. This boost could be exploited for reducing energy dissipation in electronics. In this talk, I shall discuss our current understanding of negative capacitance derived from experimental demonstration of steady state negative capacitance, which allows one to access an otherwise forbidden part of the energy landscape in ferroelectric materials. The discovery of HfO2 based ferroelectrics has enabled the integration of ferroelectric materials onto Si in a process compatible way. This makes it possible to achieve negative capacitance transistors. I shall discuss some of our most recent transistor work. To be used in most advanced transistors, ferroelectric materials will need to scaled down below 20A in thickness. Some results on such extremely thin FE materials will also be presented. Biography S. Salahuddin is the TSMC Distinguished Professor of Electrical Engineering and Computer Sciences at the University of California Berkeley. His work has focused mostly on conceptualization and exploration of novel device physics for low power electronic and spintronic devices. Salahuddin has received the Presidential Early Career Award for Scientist and Engineers (PECASE). Salahuddin also received a number of other awards including the NSF CAREER award, the IEEE Nanotechnology Early Career Award, the Young Investigator Awards from (AFOSR) and (ARO), and the IEEE George E Smith Award. Salahuddin is a co-director of the Berkeley Device Modeling Center (BDMC) and Berkeley Center for Negative Capacitance Transistors (BCNCT). Salahuddin is also a co-director of ASCENT, one of the six centers of the JUMP initiative sponsored by SRC/DARPA. He served on the editorial board of IEEE Electron Devices Letters (2013-16) and was the chair of the IEEE Electron Devices Society committee on Nanotechnology (2014-16). Salahuddin is a Fellow of the IEEE and the APS. |
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APRIL 1Kristen Hunter-Cevera, Marine Biological Laboratory3:00–4:00 pm, Room 15-253 Ecological Dynamics of a Marine Cyanobacteria Population Marine picocyanobacteria are key players in both open ocean and coastal waters. These organisms are numerically dominant and responsible for up to a quarter of marine primary production, and it is important to understand the factors, both abiotic and biotic, that affect their abundance and activity. Here we present insights into the dynamics of a coastal Synechococcus population on the U.S. Northeast Shelf. This population has been monitored with high resolution, automated flow cytometry since 2003, and the resulting 16-year time series has provided novel understanding into the environmental and biological controls on this population. These dynamics, however, result from a diverse Synechococcus assemblage, comprised of multiple, distinct strains that differ in their ecophysiologies and relative abundances. We explore these field observations with laboratory investigations of cultured isolates, and in particular focus on interactions with heterotrophic protist grazers and associated bacteria. We have begun to explore the latter with synchrotron radiation-based Fourier transform infrared (sFTIR) spectromicroscopy at the ALS, enabling us to gather valuable chemical information about cellular components. Kristen Hunter-Cevera is currently a Hibbitt Early Career Fellow at the Marine Biological Laboratory in Woods Hole, Massachusetts. She is interested in microbial ecology and specifically how environmental variables, species interactions and underlying diversity structure affect microbial community dynamics, activity and stability. Her research focuses on the marine cyanobacterium Synechococcus as a model to explore these questions with a combination of field observations, laboratory culture experiments and modeling. She received a B.S. in biology and mathematics in 2008, and an M.B.A. in 2009 from West Virginia University. She earned a Ph.D. in biological oceanography from the Massachusetts Institute of Technology/Woods Hole Oceanographic Institution Joint Program in 2014 with a National Defense Science and Engineering Graduate Fellowship, and is currently a Simons Early Career Investigator in Marine Microbial Ecology and Evolution. |
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APRIL 8Alexander Gray, Temple University3:00–4:00 pm, Room 15-253 Synergies between Synchrotron and Lab-based X-ray Techniques for the Studies of Complex Materials and Interfaces Photoemission spectroscopy is a powerful and well-established experimental technique for probing the electronic structure of matter. In this talk, I will discuss several promising new directions in this field, which stem from experimental and theoretical studies wherein photoemission experiments are carried out at higher excitation energies and in tandem with other complementary synchrotron and lab-based x-ray techniques. I will focus specifically on the recent studies of novel engineered quantum materials and heterostructures, which aim at gaining a clear understanding of the depth-dependent nanoscale evolution of materials’ electronic properties at the surface, in the bulk, and across the buried interfaces by using multiple modalities of hard and soft x-ray photoemission both separately and in concert with each other. Alexander Gray is an Assistant Professor of Physics at Temple University. He received his Ph.D. in Physics from the University of California Davis, and then did his postdoctoral training at Stanford University and SLAC National Accelerator Laboratory. Prof. Gray’s group’s research activities focus on the development of novel depth- and time-resolved x-ray spectroscopic and scattering techniques for studying rich electronic behaviors in quantum solids and interfaces. He has been awarded a Young Investigator Program award by the Department of Defense, and the Early Career Award by the Department of Energy. |
Fall 2019 Colloquium Series
Summer 2019 Colloquium Series
Spring 2019 Colloquium Series
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APRIL 17David Kisailus, UC Riverside3:00–4:00 pm, Room 15-253 Biologically Inspired Multi-Functional Materials Abstract
With an alarming global population increase, there is a critical need for the development of multifunctional strong and tough lightweight materials for use in many societal applications. Natural systems have evolved efficient strategies, exemplified in the biological tissues of numerous animal and plant species, to synthesize and construct composites from a limited selection of available starting materials that often exhibit exceptional mechanical properties that are similar, and frequently superior to, mechanical properties exhibited by many engineering materials. Nature goes one step further, often producing materials with that display multi-functionality in order to provide organisms with a unique ecological advantage to ensure survival.
In this work, we investigate organisms that have adapted structures, which are not only strong and tough, but also demonstrate multifunctional features dependent on the underlying organic-inorganic components. We are utilizing additive manufacturing methods to help validate hypotheses based on our experimental observations as well as translate key mechanistic insights to scalable and manufacturable engineered products. Furthermore, we discuss strategies for synthesis of these bio-composites, by studying for example, the heavily crystallized radular teeth the chitons, a group of elongated mollusks that graze on hard substrates for algae. From the investigation of synthesis-structure-property relationships in these unique organisms, we are now developing and fabricating cost-effective and environmentally friendly multifunctional engineering composites and biologically inspired nanomaterials for energy conversion and storage. Biography Prof. David Kisailus is the Associate Vice Chancellor of Research Facilities, the Winston Chung Endowed Chair of Energy Innovation and Professor in the Materials Science and Engineering Program and the Department of Chemical and Environmental Engineering at the University of California at Riverside. Dr. Kisailus, a Kavli Fellow of the National Academy of Sciences and a UNESCO Chair in Materials and Technologies for Energy Conversion, Saving and Storage, received his Ph.D. in Materials from the University of California at Santa Barbara, 2002; M.S. in Materials Science (University of Florida) and B.S. in Chemical Engineering (Drexel University). Dr. Kisailus was a post-doctoral researcher in Molecular Biology at UCSB and a Research Scientist at HRL Laboratories working on synthesis of materials for fuel cells and batteries. His “Biomimetic and Nanostructured Materials Laboratory” investigates fundamental synthesis – structure – property relationships in biological composites, with unique mechanical, thermal and optical properties, in order to develop multifunctional light-weight, tough and impact resistant materials as well as develop / utilize solution-based processes to synthesize nanoscale materials for energy-based applications. The ultimate goal is to be able to leverage lessons from Nature to develop next generation materials for energy conversion and storage as well as for environmental applications. |
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APRIL 24Pupa Gilbert, University of Wisconsin–Madison3:00–4:00 pm, Room 15-253 How Organisms Build Crystals Abstract Crystalline biominerals cost energy but provide the diverse organism making them with scaffolding, shielding, locomotion, mastication, gravity and magnetic field sensing, etc. How these crystals are formed reveals how living organisms harness the laws of physics and chemistry for their evolutionary advantage, but also because it can teach us new synthesis strategies for materials with targeted properties. Recent synchrotron spectromicroscopy methods reveal one formation mechanism and one toughening mechanism:
Biography Pupa Gilbert got her doctoral degree in Physics in 1987 in Rome, Italy. She was a staff scientist at the Italian CNR and the EPFL before coming to the US as a professor of physics at UW-Madison in 1999. She is a physicist with a burning passion for biology and materials science, and she studies natural biominerals, their structure, and formation mechanisms with the synchrotron spectromicroscopy methods she developed, and for which she won the 2018 Shirley award for outstanding scientific achievement at the ALS. |
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MAY 1Abby Kavner, UCLA3:00–4:00 pm, Room 6-2202 The Electrochemical Planet: Phase Stability and Equations of State for Metals and Oxides at the High Pressure and Temperatures of Earth's Interior Abstract The boundary between the Earth’s metal core and oxide mantle plays an important role in thermal, mechanical and chemical evolution of planet. The thermodynamics of core and mantle materials at high pressure and temperature conditions govern which elements tend to be oxidized in the mantle and which tend to be reduced, forming the core. In this talk, I will show how synchrotron-based X-ray diffraction methods can be used to help determine phase stability and measure thermoelastic properties of metals, oxides, and carbonates at the extreme conditions relevant to the interior of the planet. The goal is to extend the electrochemical series to extreme conditions of planetary interiors. Biography Professor Kavner’s love for geosciences developed during summers spent camping, hiking, and canoeing throughout the northeast. She studied materials science and engineering at Northwestern University (B.S. 1989) and at UC Berkeley (M.S.E 1993). At that point she discovered the great materials science problems posed by Earth science, and switched fields, to Geophysics at UC Berkeley (Ph.D. 1997). She has been collecting data at various synchrotron sources since encountering her first empty hutch in 1995. After postdoctoral stints at Princeton and Lamont Doherty Earth Observatory, she has been a faculty member at UCLA since 2002. |
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MAY 8Michael Odelius, Stockholm University3:00–4:00 pm, Room 6-2202 Hydrogen Bonding and Ultra-Fast Dynamics—Ab Initio Modeling of Resonant Inelastic X-Ray Scattering Abstract It is important to acquire detailed molecular information on hydrogen bonding, which determines the properties of liquid water and the outcome of many biochemical processes. Quantum chemical calculations and x-ray spectroscopy form naturally complementary techniques for investigation of hydrogen bonding and the influence on the electronic structure. Different levels of theoretical analysis will be discussed in the presentation. The work benefits greatly from experiments at Beamline 8.0.1 at ALS, where x-ray emission measurements of liquid water and aqueous solutions have been performed and have been analysed in terms of ab initio molecular dynamics simulations and spectrum simulations. https://als.lbl.gov/wp-content/uploads/2016/09/actrep2005.pdf https://als.lbl.gov/exploring-structure-aqueous-solutions-salsa/ The recent development of ultrahigh-resolution resonant inelastic x-ray scattering (RIXS) has, in combination with quantum mechanical simulations, allowed us to analyze highly excited vibrational quanta in liquid water, giving a clue as to how hydrogen bonding influences the long-range region of O-H potentials in the liquid. In addition, we have shown that high-level quantum chemical calculations can be used for modeling RIXS of valence-excited species and simulating excited state dynamics, which allows us to assist in the interpretation of time-resolved x-ray spectra to determine the pathways of photo-induced processes. Biography Michael Odelius is a professor in theoretical chemical physics at Stockholm University. He received his Ph.D. in physical chemistry at Stockholm University in 1994 working on simulations on nuclear spin relaxation, measured with radio waves. His interest has now turned to the other end of the electromagnetic spectrum, and he is working on simulations of X-ray spectra and of ultra-fast chemical processes. He was a post-doctoral researcher in the group of Michele Parrinello the Max Planck Institute for Solid State Research in Stuttgart and in the group of Jürg Hutter at the University of Zurich. Combining ab initio molecular dynamics and multi-configurational quantum chemical calculations, he studies the interplay between electronic structure, inter-molecular interactions and dynamics in hydrogen bonded liquids and in photo-induced processes. |
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MAY 15Jyoti Katoch, Carnegie Mellon University3:00–4:00 pm, Room 15-253 Unraveling the Novel Quantum Phenomena in Two-Dimensional Materials Using Transport and Photoemission Spectroscopy Abstract The extreme surface sensitivity of two-dimensional (2D) materials provides an unprecedented opportunity to engineer the physical properties of these materials via changes to their surroundings, including substrate, adsorbates, defects, etc. In addition, 2D materials can be mechanically assembled layer-by-layer to form vertical or lateral heterostructures, making it possible to create new material properties merely by the choice of the constituting 2D layers and the relative twist angle between them. In this talk, I will discuss our recent transport [1] and photoemission [2] results that shed light on the intricate relationship between controlled external perturbations, substrate, and electronic properties of 2D materials. I will show that the decoration of the 2D materials with adatoms, such as sub-lattice selective atomic hydrogenation of graphene and alkali metal doping of single layer WS2 can be utilized to tailor electronic properties and induce novel quantum phenomena in 2D landscape. [1] Katoch et. al., Physical Review Letters 121, 136801 (2018). [2] Katoch et. al., Nature Physics 14, 355-359 (2018).Biography Jyoti Katoch grew up in Chandigarh, India and received her Ph.D. in physics from University of Central Florida in 2014. She held a postdoctoral appointment at the Ohio State University from 2014-2016 and as research scientist from 2016-2018. She recently joined the physics department at the Carnegie Mellon University as an assistant professor in fall 2018. |
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MAY 22Stephan Roth, Deutsches Elektronen-Synchrotron (DESY)3:00–4:00 pm, Room 6-2202 Challenges in Grazing-Incidence Small-Angle X-Ray Scattering (GISAXS) Abstract In situ and operando studies in thin film technologies are crucial ingredients for elucidationg the nanostructural evolution during fabrication and operation of thin film devices, as the nanostructure governs the macroscopic properties. Hence, grazing incidence small-angle (and wide angle) X-ray scattering has developed into a vital advanced method in this field. To sketch this development, I present highlight examples from coating technologies, namely spray-coating and physical vapor deposition [1,2], both of which are heavily used in thin film technology and roll-to-roll coating. In combination with biomaterials, new routes for organic electronics become possible [3]. Challenges involved are the high data rates during the in situ experiments [4], which necessitate novel and fast approached for data analysis [5]. Finally, as a very recent development, I will introduce the use of GISAXS in elucidating the nanostructure of flexible electronics [6]. [1] S. V. Roth: “A deep look into the spray coating process in real-time—the crucial role of x-rays”, J. Phys.: Condens. Matter 28, 403003 (2016) [2] M. Schwartzkopf and S. V. Roth: “Investigating Polymer–Metal Interfaces by Grazing Incidence Small-Angle X-Ray Scattering from Gradients to Real-Time Studies”, Nanomaterials 6, 239 (2016) [3] W. Ohm, A. Rothkirch, P. Pandit, V. Körstgens, P. Müller- Buschbaum, R. Rojas, S. Yu, C. J. Brett, D. L. Söderberg, S. V. Roth: “Morphological properties of air-brush spray deposited enzymatic cellulose thin films”, J. Coat. Technol. Res. 15, 759 (2018) [4] M. Schwartzkopf, A. Hinz, O. Polonskyi, T. Strunskus, F. C. Löhrer, V. Körstgens, P. Müller-Buschbaum, F. Faupel, and S. V. Roth: “Role of sputter deposition rate in tailoring nanogranular gold structures on polymer surfaces”, ACS Appl. Mater. Interfaces 9, 5629 (2017) [5] G. Benecke, W. Wagermaier, C. Li, M. Schwartzkopf, G. Flucke, R. Hoerth, I. Zizak, M. Burghammer, E. Metwalli, P. Müller-Buschbaum, M. Trebbin, S. Förster, O. Paris, S. V. Roth, and P. Fratzl: “A customizable software for fast reduction and analysis of large X-ray scattering data sets: applications of the new DPDAK package to small-angle X-ray scattering and grazing-incidence small-angle X-ray scattering”, J. Appl. Cryst. 47, 1797 (2014)Biography Dr. Stephan Volkher Roth is adjunct professor at KTH Royal Institute of Technology in Stockholm, Sweden, and beamline manager of the Micro- and Nanofocus-X-ray scattering beamline P03 including the surface science labs attached at Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany. He studied physics in Bonn, and obtained his PhD at Technische Universität München (TUM), Munich, Germany, in 2001 (Prof. Dr. Petry) in neutron scattering. After his Postdoc at ESRF in Grenoble, France, he moved to DESY, Hamburg in 2004, where he became staff scientist in 2006. His research interests are sustainable biomaterials, nanoparticle formation, hybrid nanostructures, and metal-polymer nanostructures. He focuses on the investigation of coating technology for thin film fabrication using real-time X-ray methods with the aim of correlating the nanostructural evolution in thin films with their optical and electronic functionality. He has an H-index of 38 and authored and co-authored more than 220 peer-reviewed publications. |