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  • Dr. Julia Greer - Munushian Seminar Speaker, Friday, February 23rd at 2:00pm in EEB 132

    Fri, Feb 23, 2018 @ 02:00 PM - 03:30 PM

    Ming Hsieh Department of Electrical and Computer Engineering

    Conferences, Lectures, & Seminars


    Speaker: Dr. Julia Greer, California Institute of Technology

    Talk Title: Materials by Design: 3-Dimensional Nano-Architected Meta-Materials

    Abstract: Creation of extremely strong and simultaneously ultra lightweight materials can be
    achieved by incorporating architecture into material design. We fabricate threedimensional
    (3D) nano-architectures, i.e. nanolattices, whose constituents vary in size
    from several nanometers to tens of microns to centimeters. These nanolattices can
    exhibit superior thermal, photonic, electrochemical, and mechanical properties at extremely
    low mass densities (lighter than aerogels), which renders them ideal for many
    scientific pursuits and technological applications. The dominant properties of such
    meta-materials, where individual constituent size at each relevant scale (atoms to
    nanometers to microns) is comparable to the characteristic microstructural length
    scale of the constituent solid, are largely unknown because of their multi-scale nature.
    To harness the beneficial properties of 3D nano-architected meta-materials, it is
    critical to assess properties at each relevant scale while capturing the overall structural
    complexity.
    We describe the deformation, as well as the mechanical, biochemical,
    electrochemical, thermal, and photonic properties of nanolattices made of different
    materials with varying microstructural detail. Attention is focused on uncovering the
    synergy between the internal atomic-level microstructure and the nano-sized external
    dimensionality, where competing material- and structure-induced size effects drive
    overall response and govern these properties. Specific discussion topics include the
    nanofabrication and characterization of (often hierarchical) three-dimensional nanoarchitected
    meta-materials and their applications in chemical and biological devices,
    ultra lightweight energy storage systems, damage-tolerant fabrics, and photonic
    crystals.

    Biography: Greer's research focuses on creating and characterizing classes of materials with multiscale
    microstructural hierarchy, that utilize the combination of three-dimensional (3D)
    architectures with nanoscale-induced material properties. These include nature-made
    materials, i.e. bone and hard biological systems, as well as synthetic ones that can be
    comprised of a broad range of materials: from ceramics and metals to glasses, polymers,
    organics, organic/inorganic hybrids, and multi-functional smart materials. These nanoarchitected
    meta-materials not only provide a rich "playground" for fundamental
    science but also have the potential to enable new technological advances in biomedical
    devices, battery electrodes, lightweight structural materials, and
    Greer obtained her S.B. in Chemical Engineering with a minor in Advanced Music
    Performance from MIT in 1997 and a Ph.D. in Materials Science from Stanford, worked
    at Intel (2000-03) and was a post-doc at PARC (2005-07). Julia joined Caltech in 2007
    and currently is a full professor with appointments in Materials Science, Mechanical
    Engineering, and Medical Engineering.
    Greer has more than 130 publications and has delivered over 100 invited lectures, which
    include 2 TEDx talks, multiple named seminars at universities, the Watson lecture at
    Caltech, the Gilbreth Lecture at the National Academy of Engineering, the Midwest
    Mechanics Lecture series, and a "IdeasLab" at the World Economic Forum. She was
    named a Vannevar-Bush Faculty Fellow by the US Department of Defence (2016) and
    CNN's 20/20 Visionary (2016). Her work was recognized among Top-10 Breakthrough
    Technologies by MIT's Technology Review (2015). Greer was named as one of "100
    Most Creative People" by Fast Company and a Young Global Leader by World
    Economic Forum (2014) and received multiple career awards: Kavli (2014), Nano
    Letters, SES, and TMS (2013); NASA, ASME (2012), Popular Mechanics
    Breakthrough Award (2012), DOE (2011), DARPA (2009), and Technology Review's
    TR-35, (2008).
    Greer serves as an Associated Editor for Nano Letters and Extreme Mechanics Letters.
    She is also a concert pianist, with recent performances of "nanomechanics rap" with
    MUSE/IQUE, solo piano recitals and chamber concerts (2007-present), and as a soloist
    of Brahms Concerto No. 2 with Redwood Symphony (2006).

    Host: EE-Electrophysics

    More Info: minghsiehee.usc.edu/about/lectures/munushian

    Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132

    Audiences: Everyone Is Invited

    Posted By: Marilyn Poplawski

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