Conferences, Lectures, & Seminars
Events for February
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PhD Defense
Fri, Feb 01, 2019 @ 01:01 PM - 02:00 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Speaker: Shanyuan Niu, Ph.D. Candidate, Materials Science
Talk Title: Perovskite Chalcogenides: Emerging Semiconductors for Visible to Infrared Optoelectronics
Abstract: Rational design of new materials or identification of novel functionalities in underexplored materials, especially semiconductors, has been a key contributor to various electronic, photonic, and energy technologies. Transition metal perovskite chalcogenides (TMPCs), an emerging class of materials with rich tunability and functionality, are explored as stable, environmentally friendly semiconductors for optoelectronic applications. They can be viewed as the inorganic alternatives to hybrid halide perovskites, and chalcogenide counterparts of perovskite oxides with desirable optoelectronic properties in the visible to infrared part of the electromagnetic spectrum. TMPCs with perovskite and related structures can adopt three-dimensional, quasi-two-dimensional, and quasi-one-dimensional structural networks. Shanyuan will talk about the synthesis, characterization, and physical properties of TMPCs. The focus will be on several branches, including photovoltaic potential and anomalous bandgap evolution in three-dimensional and quasi-two-dimensional TMPCs, and building infrared optical anisotropy in quasi-one-dimensional TMPCs.
Location: Charles Lee Powell Hall (PHE) - 223
Audiences: Everyone Is Invited
Contact: Karen Woo/Mork Family
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Mork Family Department of Chemical Engineering and Materials Science Seminar - - Lyman L. Handy Colloquia
Tue, Feb 05, 2019 @ 04:00 PM - 05:20 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Speaker: Professir Chris G. Van de Walle, Materials Department, University of California, Santa Barbara
Talk Title: Hydrogen interactions with materials: From transistors to fuel cells
Abstract: Hydrogen is almost always unintentionally present as an impurity in materials, and often significantly affects their properties: structural materials are weakened by hydrogen embrittlement, semiconductors suffer a hydrogen-induced decrease in conductivity, and battery electrodes hydrogen can degrade when exposed to hydrogen. The application of hydrogen as an energy source in fuel cells lends additional urgency to understanding hydrogen interactions with materials. State-of-the-art first-principles calculations have allowed us to elucidate the many facets of this behavior. A systematic study of hydrogen in a wide range of hosts has revealed the existence of a universal alignment for the electronic level of hydrogen in semiconductors, insulators, and even aqueous solutions. The alignment allows predicting the electrical activity of hydrogen in any host material and shows that the physics of hydrogen turns out to be unexpectedly connected to other important problems in materials physics and electrochemistry.
Biography: Chris Van de Walle is a Distinguished Professor of Materials and the inaugural recipient of the Herbert Kroemer Endowed Chair in Materials Science at the UC, Santa Barbara. Prior to joining UCSB in 2004, he was a Principal Scientist at the Xerox Palo Alto Research Center (PARC). He received his Ph.D. in Electrical Engineering from Stanford in 1986 and was a postdoc at IBM (1986-1988) and a Senior Member of Research Staff at Philips Laboratories (1988-1991). He has published over 400 research papers, holds 24 patents and has given over 200 invited and plenary talks. Van de Walle is a Member of the National Academy of Engineering, a Fellow of the APS, AVS, AAAS, MRS, IEEE, and the recipient of a Humboldt Award for Senior US Scientist, the David Adler Award from the APS, the Medard W. Welch Award from the AVS, and the TMS John Bardeen Award.
Host: Dr. Kalia
Location: John Stauffer Science Lecture Hall (SLH) - 200
Audiences: Everyone Is Invited
Contact: Karen Woo/Mork Family
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Mork Family Department of Chemical Engineering and Materials Science Seminar - Distinguished Lecture Series
Tue, Feb 12, 2019 @ 04:00 PM - 05:20 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Speaker: Professor Thomas F. Jaramillo, Department of Chemical Engineering, Stanford University
Talk Title: Catalysts and processes for the sustainable production and use of fuels and chemicals
Abstract: Society has benefitted tremendously from the science and engineering efforts that have brought crucial fuels and chemical products to market at a global-scale based on fossil feedstocks: oil, coal, and natural gas. This includes conventional liquid fuels such as gasoline, diesel, and jet fuel, in addition to many other important products such as plastics (e.g. polyethylene) and fertilizer (i.e. ammonia, NH3). Continuing to use fossil-based resources at such high rates, however, could potentially lead to troubling consequences ahead. This motivates the development of new chemical processes to produce the same kinds of fuels and chemicals that we rely on today, however using renewable energy and sustainable feedstocks instead.
In this talk we will discuss new processes that employ renewable energy (e.g. wind and solar) to power the production of fuels and chemicals in a sustainable manner. This effort is largely motivated by the dropping costs of renewable electricity, the growing penetration of renewables into energy markets, and the need for storing variable electricity. Central to this theme is an effort to develop catalyst materials and associated processes capable of driving important chemical transformations in a sustainable manner involving renewable energy. Specific examples include the production of hydrogen (H2),1,2 carbon-based products (e.g. hydrocarbons, alcohols),3 and ammonia (NH3) fertilizer.4
The development of catalysts with appropriate properties can serve as the basis of new, renewable pathways to produce the large-scale fuels and chemicals that could play a major role in reaching sustainability goals for the globe.
References
1. Z.W. Seh, J. Kibsgaard, C.F. Dickens, I. Chorkendorff, J.K. Nørskov, T.F. Jaramillo. Science, 355, 6321 (2017).
2. J.W.D. Ng, T.R. Hellstern, J. Kibsgaard, A.C. Hinckley, J.D. Benck, and T.F. Jaramillo. ChemSusChem, 8, 3512-3519 (2015).
3. C. Hahn, T. Hatsukade, Y.-G. Kim, A. Vailionis, J.H. Baricuatro, D.C. Higgins, S.A. Nitopi, M.P. Soriaga, and T.F. Jaramillo. Proc. Nat. Adad. Sci., 114, 5918-“5923 (2017).
4. J.M. McEnaney, A.R. Singh, J.A. Schwalbe, J. Kibsgaard, J.C. Lin, M. Cargnello, T.F. Jaramillo, and J.K. Nørskov. Energy Environ. Sci, 10, 1621-1630 (2017).
Host: Dr. Yoon
Location: John Stauffer Science Lecture Hall (SLH) - 200
Audiences: Everyone Is Invited
Contact: Karen Woo/Mork Family
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Mork Family Department of Chemical Engineering and Materials Science Seminar - - Lyman L. Handy Colloquia
Tue, Feb 26, 2019 @ 04:00 PM - 05:20 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Speaker: Professor R. Ramesh, Department of Physics and Department of Materials Science and Engineering , University of California, Berkeley
Talk Title: Electric Field Control of Magnetism
Abstract: Complex perovskite oxides exhibit a rich spectrum of functional responses, including magnetism, ferroelectricity, highly correlated electron behavior, superconductivity, etc. The basic materials physics of such materials provide the ideal playground for interdisciplinary scientific exploration with an eye towards real applications. Over the past decade the oxide community has been exploring the science of such materials as crystals and in thin film form by creating epitaxial heterostructures and nanostructures. Among the large number of materials systems, there exists a small set of materials which exhibit multiple order parameters; these are known as multiferroics, particularly, the coexistence of ferroelectricity and some form of ordered magnetism (typically antiferromagnetism). The scientific community has been able to demonstrate electric field control of both antiferromagnetism and ferromagnetism at room temperature. Current work is focused on ultralow energy (1 attoJoule/operation) electric field manipulation of magnetism as the backbone for the next generation of ultralow power electronics. In this lecture, I will describe our progress to date on this exciting possibility. The lecture will conclude with a summary of where the future research is going.
References: 1. S. Manipatruni et al. Nature 565, 35 2019. 2. Heron, J. T. et al. Nature 516, 370 (2014).
Biography: Professor Ramesh graduated from the UC Berkeley in 1987. His pioneering research is in multiferroic oxides and he continues to pursue key scientific problems in complex multifunctional oxide thin films, nanostructures and heterostructures at Berkeley. His group demonstrated several critical steps towards the next generation of ultralow power storage and spintronics devices. He is highly cited (over 65,000 citations, H-factor =110). He has received the APS David Adler Lectureship award and the James McGroddy Prize, the TMS Bardeen Prize and the 2018 IUPAP Magnetism Prize and Neel Medal. In 2014, he was recognized as a Thomson-Reuters Citation Laureate in Physics for his work on multiferroics. From December 2010 to August 2012 he served as the Founding Director of the SunShot Initiative at the Department of Energy, overseeing and coordinating the R&D activities and funding (300M$/year) of the U.S. Solar Program. In 2011, he was elected to the National Academy of Engineering.
Location: John Stauffer Science Lecture Hall (SLH) - 200
Audiences: Everyone Is Invited
Contact: Karen Woo/Mork Family