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May30
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New Science enabled by measuring the probability current flow of an atomic-scale electron beam
Presnted by: David A. Muller
scattered electrons from a localized beam propagating through it. A new generation of high-speed, momentum-resolved electron microscope detectors brings us closer to realizing this general goal and in doing so enable new imaging modes spanning sub-Angstrom to multi-micron length scales. This enables not only measurements of probability current flow that can be used to map electric and magnetic fields at high spatial resolution, but also the orbital angular momentum of an electron beam to record torque transfer. We apply these methods and a new high-dynamic range detector developed at Cornell to imaging arrays of ferroelectric polarization vortices in PbTiO3/SrTiO3 superlattices. From the asymmetry in probability current flow, we show the vortices are chiral, with a non-trivial axial component. The detector has also proved useful for a wide range of quantitative applications including the imaging of strain fields in 2D materials, high-dose-efficiency biological imaging, and super-resolution imaging by ptychography.
Bio: David Muller is a professor of Applied and Engineering Physics at Cornell University, and the co-director of the Kavli Institute at Cornell for Nanoscale Science. He is a graduate of the University of Sydney, received a PhD from Cornell University and worked as a member of the technical staff at Bell Labs for six years before returning as faculty to Cornell. His current research interests include the development of a new generation of high-speed imaging electron detectors, and the atomic-scale control and characterization of matter for applications in energy storage and conversion.
TIME Tuesday, May 30, 2017 at 4:00 PM - 5:00 PM
LOCATION L211 Technological Institute map it
CONTACT Department Office matsci@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering
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Apr22
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-Policy & ProceduresTIME Monday, April 22, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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Apr25
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-Policy & ProceduresTIME Thursday, April 25, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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Apr29
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-Policy & ProceduresTIME Monday, April 29, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May2
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-Policy & ProceduresTIME Thursday, May 2, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May6
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-Policy & ProceduresTIME Monday, May 6, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May8
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lessThe Center for Scientific Studies in the Arts is a collaboration between the Art Institute of Chicago and materials science-related departments at Northwestern University to pursue objects-based and objects-inspired scientific research. Materials research benefits ongoing work in conservation, archaeology, art history, and curatorial scholarship.
Learn how the Center uses materials research to care for art objects in sustainable, innovative ways with Maria Kokkori, Northwestern Associate Professor of Electrical and Computer Engineering and Senior Scientist in the Center for Scientific Studies in the Arts. She will be in conversation with Corey Byrnes, Northwestern Associate Professor of Chinese Culture and co-founder/co-director of the Environmental Humanities Workshop in Kaplan Humanities Center.
This event is presented by the McCormick School of Engineering and Applied Science in conjunction with exhibition Actions for the Earth: Art, Care & Ecology.
TIME Wednesday, May 8, 2024 at 6:00 PM - 7:30 PM
LOCATION Block Museum of Art, Mary and Leigh map it
CONTACT Block Museum of Art block-museum@northwestern.edu EMAIL
CALENDAR Block Museum of Art
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May9
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-Policy & ProceduresTIME Thursday, May 9, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May13
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-Policy & ProceduresTIME Monday, May 13, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May16
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-Policy & ProceduresTIME Thursday, May 16, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May20
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-Policy & ProceduresTIME Monday, May 20, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May23
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-Policy & ProceduresTIME Thursday, May 23, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May27
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-Policy & ProceduresTIME Monday, May 27, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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May30
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-Policy & ProceduresTIME Thursday, May 30, 2024 at 10:00 AM - 11:00 AM
LOCATION 2036, Cook Hall map it
CONTACT Wade Tischhauser wade@northwestern.edu EMAIL
CALENDAR Department of Materials Science and Engineering (MatSci)
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Jun10
EVENT DETAILSmore info
lessMcCormick School of Engineering PhD Hooding and Master’s Degree Recognition Ceremony
TIME Monday, June 10, 2024 at 9:00 AM - 11:00 AM
LOCATION Welsh-Ryan Arena
CONTACT Amy Pokrass amy.pokrass@northwestern.edu EMAIL
CALENDAR McCormick School of Engineering and Applied Science
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Jun10
TIME Monday, June 10, 2024 at 2:00 PM - 4:00 PM
LOCATION Welsh-Ryan Arena
CONTACT Amy Pokrass amy.pokrass@northwestern.edu EMAIL
CALENDAR McCormick School of Engineering and Applied Science