Intelligentsia of Nano-Architected Hierarchical Materials

Add to your list(s) Download to your calendar using vCal

• Professor J.R. Greer, California Institute of Technology
• Wednesday 05 July 2023, 10:00-11:00
• Cambridge University Engineering Department, LR3B.

If you have a question about this talk, please contact Hilde Hambro.

Intelligentsia of Nano-Architected Hierarchical Materials

Creation of reconfigurable and multi-functional materials can be achieved by incorporating architecture into material design. In our research, we design and fabricate three-dimensional (3D) nano-architected materials that can exhibit superior and often tunable thermal, photonic, electrochemical, biochemical, and ¬mechanical pro¬¬¬per¬¬ties at ex¬tre¬me¬ly low mass densities (lighter than aerogels), which renders them useful and enabling in tech¬no¬lo¬gi¬cal applications. Dominant properties of such meta-materials are driven by their multi-scale hierarchy: from characteristic material microstructure (atoms) to individual constituents (nanometers) to structural components (microns) to overall architectures (millimeters and above). Our research is focused on fabrication and synthesis of nano- and micro-architected materials using 3D lithography, nanofabrication, and additive manufacturing (AM) techniques, as well as on investigating their mechanical, biochemical, electrochemical, electromechanical, and thermal properties as a function of architecture, constituent materials, and microstructural detail. Additive manufacturing (AM) represents a set of processes that fabricate complex 3D structures using a layer-by-layer approach, with some advanced methods attaining nanometer resolution and the creation of unique, multifunctional materials and shapes derived from a photoinitiation-based chemical reaction of custom-synthesized resins and thermal post-processing. A type of AM, vat polymerization, has allowed for using hydrogels as precursors, and exploiting novel material properties, especially those that arise at the nano-scale and do not occur in conventional materials. The focus of this talk is on additive manufacturing via vat polymerization and function-containing chemical synthesis to create 3D nano- and micro-architected metals, ceramics, multifunctional metal oxides (nano-photonics, photocatalytic, piezoelectric, etc.), and metal-containing polymer complexes, etc., as well as demonstrate their potential in some real-use biomedical, protective, and sensing applications. I will describe how the choice of architecture, material, and external stimulus can elicit stimulus-responsive, reconfigurable, and multifunctional response.

Selected relevant publications:

1. Saccone, M. A., Gallivan, R.A., Narita, K., Yee, Daryl W., Greer, J.R. “Additive manufacturing of micro-architected metals via hydrogel infusion.” Nature 612, 685 (2022) 2. Xia, X., Spadaccini, C.M., Greer, J.R. “Responsive Materials Architected in Space and Time” Nat Rev Mater 7, 683–701 (2022) 3. Zhang, W., Zhang, X., Li, Z., Hodyss, R., Malaska, M., Gao, H., Greer, J.R. “Deformation Characteristics of Solid-state Benzene: a Step towards Understanding Planetary Geology” Nature Communications 13, 7949 (2022) 4. Portela, C.M., Edwards, B.W., Veysset, D. et al. “Supersonic Impact Resilience of Nanoarchitected Carbon.” Nature Mater. 20, 1491–1497 (2021) 5. Narita, K., Saccone, M.A., Sun, Y. et al. “Additive manufacturing of 3D batteries: a perspective.” J Mater Research 37, 1535–1546 (2022) 6. Narita, K., et al. “3D Architected Carbon Electrodes for Energy Storage” Advanced Energy Materials; 11 (5) (2021) 7. Xia, X., Afshar, A., Yang, H., Portela, C.M., Kochmann, D.M., Di Leo, C.V., Greer, J.R. “Electrochemically Reconfigurable Architected Materials” Nature, 573 (7773) 205 (2019). 8. Yee, D., Lifson, M., Greer, J.R. “Additive Manufacturing of 3D Architected Multifunctional Metal Oxides” Advanced Materials 31, 1901345 (2019). 9. Vyatskikh, A., Ng, R. C., Briggs, R., Greer, J.R. “Additive Manufacturing of High-Refractive-Index, Nanoarchitected Titanium Dioxide for 3D Dielectric Photonic Crystals” Nano Letters 20 (5) (2020) 10. Portela, C. Vidyasagar, A., Greer, J.R., Kochmann, D. “Extreme Mechanical Resilience of Self-assembled Nano-labyrinthine Materials” Proceedings of the National Academy of Sciences, USA 117 (11) (2020)

Bio:Julia R. Greer Ruben F and Donna Mettler Professor of Materials Science, Mechanics, Medical Engineering

Greer’s research focuses on creating and characterizing classes of materials with multi-scale microstructural hierarchy, which often combine three-dimensional (3D) architectures with nanoscale-induced material properties. We develop fabrication and syntheses of micro- and nano-architected materials using 3D lithography, nanofabrication, and additive manufacturing (AM) techniques, and investigate their mechanical, electrochemical, electromechanical, biochemical, and photonic properties as a function of architecture, constituent materials, and microstructural detail. We strive to uncover the synergy between the internal atomic- and molecular-level microstructure and the multi-scale external dimensionality, where competing material- (nano) and structure- (architecture) induced size effects drive overall response and govern these properties. Specific topics include applications of 3D nano- and micro-architected materials in devices, energy absorbing media, ultra lightweight energy storage systems, filters for chemically-assisted separation, damage-tolerant fabrics, additive manufacturing, and smart, multi-functional materials. 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 Ruben F. and Donna Mettler Professor of Materials Science, Mechanics, and Medical Engineering at Caltech. Greer has more than 170 publications, has an h-index of 70, and has delivered over 100 invited lectures, which include 2 TEDx talks, multiple plenary lectures and named seminars at universities (2022: Cooper lecture at Cornell, Israel Pollak Distinguished Lecture Series at Technion, David Pope lecture at Penn, and Thayer Visionaries in Technology at Dartmouth to name a few), 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, and was recently selected as Alexander M. Cruickshank (AMC) Lecturer at the Gordon Research Conferences (2022). She received the inaugural AAAFM -Heeger Award (2019) and was named a Vannevar-Bush Faculty Fellow by the US Department of Defense (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). She is an active member of scientific community through professional societies (MRS, SES , TMS), having organized multiple symposia, been chosen as Conference Chair (MRS, 2021; GRC 2016 ), served on the Board of Directors for Society of Engineering Science (SES) and on government agency panels: DOE ’s Basic Research Needs workshop on setting Priority Research Directions (2020), National Materials and Manufacturing Board through National Academies (2020), and DoD’s Bush Fellows Research Study Team (2020). Greer is the Fletcher Jones Director of the Kavli Nanoscience Institute at Caltech and serves as an Associate Editor for Nano 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).

This talk is part of the Engineering - Mechanics and Materials Seminar Series series.

This talk is included in these lists:

• All Talks (aka the CURE list)
• Cambridge University Engineering Department Talks
• Cambridge University Engineering Department, LR3B
• Cambridge talks
• Centre for Smart Infrastructure & Construction
• Computational Continuum Mechanics Group Seminars
• Engineering - Mechanics and Materials Seminar Series
• Engineering - Mechanics, Materials and Design (Div C) - talks and events
• Featured lists
• Interested Talks
• Lennard-Jones Centre external
• School of Technology
• Trust & Technology Initiative - interesting events
• bld31

Note that ex-directory lists are not shown.