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  • Nov
    3

    Materials Science and Engineering Colloquium: Jennifer Dionne

    Department of Materials Science and Engineering

    4:00 PM L361 Technological Institute

    EVENT DETAILS

    The Department of Materials Science and Engineering welcomes you to its 2015 Fall Colloquium Series.

    Location: Tech L361, 4:00pm

    Jennifer Dionne
    Assistant Professor
    Stanford Univerity

    Inside Out: Visualizing phase transformations and light-matter interactions within individual nanoparticles
    In Pixar's Inside Out, Joy proclaims, “Do you ever look at someone and wonder, what is going on inside?– My group asks the same question about nanomaterials whose function plays a critical role in energy, biology, and information-relevant processes. In this presentation, I will describe new techniques that enable visualization of nanoparticle phase transitions in reactive environments as well as light-matter interactions with near-atomic-scale resolution. First, we directly monitor hydrogen absorption and desorption in individual palladium nanocrystals. Our approach is based on in-situ electron energy-loss spectroscopy in an environmental transmission electron microscope. By probing hydrogen-induced shifts of the palladium plasmon resonance, we find that hydrogen loading and unloading isotherms are characterized by abrupt phase transitions and macroscopic hysteresis gaps. These results suggest that alpha and beta phases do not coexist in single-crystalline nanoparticles, in striking contrast with ensemble measurements of Pd nanoparticles. Then, we introduce a novel tomographic technique, cathodoluminescence spectroscopic tomography, to probe optical properties in three dimensions with nanometer-scale spatial and spectral resolution. Particular attention is given to reconstructing a 3D metamaterial resonator supporting broadband electric and magnetic resonances at optical frequencies. Our tomograms allow us to locate regions of efficient cathodoluminescence across visible and near-infrared wavelengths, with contributions from material luminescence and radiative decay of electromagnetic eigenmodes. The experimental signal can further be correlated with the radiative local density of optical states in particular regions of the reconstruction. Our results provide a general framework for visualizing chemical reactions and light-matter interactions with nanometer-scale resolution and in three-dimensions.

    Biography: Jennifer Dionne is an assistant professor in the department of Materials Science and Engineering at Stanford University. Jen received B.S. degrees in Physics and Electrical & Systems Engineering from Washington University in St. Louis in 2003, and a Ph.D. degree in Applied Physics from the California Institute of Technology in 2009, advised by Prof. Harry Atwater. She joined Stanford in 2010 following a postdoctoral research fellowship at the University of CA, Berkeley and Lawrence Berkeley National Laboratory, working with Prof. Paul Alivisatos. Jen's research develops new nano and optical materials for applications ranging from high-efficiency solar energy conversion to bioimaging and manipulation. This research has led to demonstration of negative refraction at visible wavelengths, development of a subwavelength silicon electro-optic modulator, development of quantum plasmonic materials, design of new optical tweezers for nano-specimen trapping, and demonstration of a metamaterial fluid. She was recently awarded the Sloan Foundation Fellowship (2015), the Presidential Early Career Award for Scientists and Engineers (2014), and the inaugural Kavli Nanoscience Early Career Lectureship (2013). She was also named one of Technology Review's TR35 - 35 international innovators under 35 tackling important problems in transformative ways (2011).

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    TIME Tuesday, November 3, 2015 at 4:00 PM - 5:00 PM

    LOCATION L361 Technological Institute    map it

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    CONTACT Department Office    matsci@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering

  • Apr
    22

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Monday, April 22, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • Apr
    25

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Thursday, April 25, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • Apr
    29

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Monday, April 29, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    2

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Thursday, May 2, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    6

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Monday, May 6, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    8

    Extending Care: A Conversation about Conservation and Futurity

    Block Museum of Art

    6:00 PM Block Museum of Art, Mary and Leigh

    EVENT DETAILSmore info

    TIME Wednesday, May 8, 2024 at 6:00 PM - 7:30 PM

    LOCATION Block Museum of Art, Mary and Leigh    map it

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    CONTACT Block Museum of Art    block-museum@northwestern.edu EMAIL

    CALENDAR Block Museum of Art

  • May
    9

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Thursday, May 9, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    13

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Monday, May 13, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    16

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Thursday, May 16, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    20

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Monday, May 20, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    23

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Thursday, May 23, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    27

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Monday, May 27, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

    ADD TO CALENDAR

    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • May
    30

    MSE Resource Center Open Lab Sessions

    Department of Materials Science and Engineering (MatSci)

    10:00 AM 2036, Cook Hall

    EVENT DETAILS

    TIME Thursday, May 30, 2024 at 10:00 AM - 11:00 AM

    LOCATION 2036, Cook Hall    map it

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    CONTACT Wade Tischhauser    wade@northwestern.edu EMAIL

    CALENDAR Department of Materials Science and Engineering (MatSci)

  • Jun
    10

    Northwestern Engineering PhD Hooding and Master's Degree Recognition Ceremony

    McCormick School of Engineering and Applied Science

    9:00 AM Welsh-Ryan Arena

    EVENT DETAILSmore info

    TIME Monday, June 10, 2024 at 9:00 AM - 11:00 AM

    LOCATION Welsh-Ryan Arena   

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    CONTACT Amy Pokrass    amy.pokrass@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Jun
    10

    Northwestern Engineering Undergraduate Convocation

    McCormick School of Engineering and Applied Science

    2:00 PM Welsh-Ryan Arena

    EVENT DETAILSmore info

    TIME Monday, June 10, 2024 at 2:00 PM - 4:00 PM

    LOCATION Welsh-Ryan Arena   

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    CONTACT Amy Pokrass    amy.pokrass@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science