Board of Reviewing Editors for Science Julia Greer

Materials by Design: Three-Dimensional (3D) Nano-Architected Meta-Materials

Julia Greer

Ruben and Donna Mettler Professor of Materials Science, Mechanics, and Medical Engineering, California Institute of Technology; Director of the Kavli Nanoscience Institute at Caltech

Engagement: Tuesday, Dec 3, 2019
Time: 2pm - 3pm; reception to follow
Location: Building 36, Room 428

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This event is free and open up to the public. Registration is required.

Abstract

Creation of extremely potent and simultaneously ultra lightweight materials can be achieved past incorporating architecture into material design. In our inquiry, we design and fabricate 3-dimensional (3D) nano-architected materials that tin can exhibit superior and oftentimes tunable thermal, photonic, electrochemical, and mechanical backdrop at extremely low mass densities (lighter than aerogels), which renders them useful, and often enabling, in many scientific pursuits and technological applications. Dominant backdrop of such meta-materials are driven by their multi-calibration nature: from feature material microstructure (atoms) to individual constituents (nanometers) to structural components (microns) to overall architectures (millimeters and above).

To harness the beneficial backdrop of 3D nano-architected meta-materials, it is critical to appraise their properties at each relevant scale while capturing overall structural complexity. Our research is focused on fabrication and synthesis of such architected materials using 3D lithography, nanofabrication, and condiment manufacturing (AM) techniques, besides every bit on investigating their mechanical, biochemical, electrochemical, electromechanical, and thermal properties as a role of architecture, constituent materials, and microstructural detail. We strive to uncover the synergy betwixt the internal atomic-level microstructure and the nano-sized external dimensionality, where competing material- and structure-induced size furnishings drive overall response and govern these properties.

The latter role of this seminar is two-fold: I will offer the audience a option of two topics: (1) Part I is focused on the mechanics, which includes compression, tension, and fracture experiments and simulations on engineered and natural (biological) 3D nano-architected materials, as well as quasi static vs. dynamic loading. (2) The focus of Role Ii is additive manufacturing via role-containing chemical synthesis to create nano- and microarchitected metals, ceramics, multifunctional metal oxides (nano photonics, photocatalytic, piezoelectric, etc.), shape memory polymers, etc., as well as demonstrate their potential in some real-use applications. In both parts, I will depict an example where unusual mechanical properties of these nano-architected materials enable creating stimulus-responsive reconfigurable materials through electrochemistry.

Biography

Greer's research focuses on creating and characterizing classes of materials with multi-scale microstructural hierarchy, which combine three-dimensional (3D) architectures with nanoscale-induced cloth properties. We develop fabrication and syntheses of micro- and nanoarchitected materials using 3D lithography, nanofabrication, and condiment manufacturing (AM) techniques, and investigate – amid others - their mechanical, biochemical, electrochemical, electromechanical, and thermal properties equally a part of compages, elective materials, and microstructural detail. Specific topics include applications of 3D architected materials in chemical and biological devices, ultra lightweight energy storage systems, damage-tolerant fabrics, additive manufacturing, and smart, multi-functional materials.

Greer obtained her S.B. in Chemical Engineering with a pocket-size in Advanced Music Performance from MIT in 1997 and a Ph.D. in Materials Scientific discipline 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 Ruben and Donna Mettler Professor of Materials Science, Mechanics, and Medical Engineering science at Caltech (effective July 2019).

Greer has more than 150 publications and has delivered over 100 invited lectures. She received the countdown AAAFM-Heeger Award (2019) and was named a Vannevar-Bush Faculty Fellow by the The states Section of Defense force (2016) and CNN'southward xx/20 Visionary (2016). Her work was recognized among Superlative-10 Breakthrough Technologies by MIT's Technology Review (2015). Greer was named equally one of "100 Most Creative People" past Fast Company and a Immature Global Leader by Earth Economic Forum (2014) and received multiple career awards: Kavli (2014), Nano Letters, SES, and TMS (2013); NASA, ASME (2012), Popular Mechanics Quantum Award (2012), DOE (2011), DARPA (2009), and Technology Review'south TR-35, (2008).

Greer is the Director of the Kavli Nanoscience Establish at Caltech and serves as an Associated Editor for Nano Letters and Extreme Mechanics Letters. She is also a concert pianist who performs solo recitals and in chamber groups, with notable performances of "Prejudice and Prodigy" with the Caltech Trio (2019), "Nanomechanics Rap" with orchestra MUSE/IQUE (2009), and as a soloist of Brahms Concerto No. 2 with Redwood Symphony (2006).

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Source: https://mitnano.mit.edu/events/materials-design-three-dimensional-3d-nano-architected-meta-materials

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