BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Talks.cam//talks.cam.ac.uk// X-WR-CALNAME:Talks.cam BEGIN:VEVENT SUMMARY:Intelligentsia of Nano-Architected Hierarchical Materials - Profe ssor J.R. Greer\, California Institute of Technology DTSTART:20230705T090000Z DTEND:20230705T100000Z UID:TALK202936@talks.cam.ac.uk CONTACT:Hilde Hambro DESCRIPTION:Intelligentsia of Nano-Architected Hierarchical Materials \n\n Creation of reconfigurable and multi-functional materials can be achieved by incorporating architecture into material design. In our research\, we d esign and fabricate three-dimensional (3D) nano-architected materials that can exhibit superior and often tunable thermal\, photonic\, electrochemic al\, biochemical\, and ¬mechanical pro¬¬¬per¬¬ties at ex¬tre¬me¬l y low mass densities (lighter than aerogels)\, which renders them useful a nd enabling in tech¬no¬lo¬gi¬cal applications. Dominant properties of such meta-materials are driven by their multi-scale hierarchy: from charac teristic material microstructure (atoms) to individual constituents (nanom eters) to structural components (microns) to overall architectures (millim eters and above). \nOur research is focused on fabrication and synthesis o f nano- and micro-architected materials using 3D lithography\, nanofabrica tion\, and additive manufacturing (AM) techniques\, as well as on investig ating their mechanical\, biochemical\, electrochemical\, electromechanical \, and thermal properties as a function of architecture\, constituent mate rials\, 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 resi ns and thermal post-processing. A type of AM\, vat polymerization\, has al lowed for using hydrogels as precursors\, and exploiting novel material pr operties\, especially those that arise at the nano-scale and do not occur in conventional materials. The focus of this talk is on additive manufactu ring 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.)\, an d metal-containing polymer complexes\, etc.\, as well as demonstrate their potential in some real-use biomedical\, protective\, and sensing applicat ions. I will describe how the choice of architecture\, material\, and exte rnal stimulus can elicit stimulus-responsive\, reconfigurable\, and multif unctional response.\n\nSelected relevant publications:\n\n1. Saccone\, M. A.\, Gallivan\, R.A.\, Narita\, K.\, Yee\, Daryl W.\, Greer\, J.R. “Addi tive manufacturing of micro-architected metals via hydrogel infusion.” N ature 612\, 685 (2022)\n2. Xia\, X.\, Spadaccini\, C.M.\, Greer\, J.R. “ Responsive Materials Architected in Space and Time” Nat Rev Mater 7\, 68 3–701 (2022) \n3. Zhang\, W.\, Zhang\, X.\, Li\, Z.\, Hodyss\, R.\, Mala ska\, M.\, Gao\, H.\, Greer\, J.R. "Deformation Characteristics of Solid-s tate Benzene: a Step towards Understanding Planetary Geology" Nature Commu nications 13\, 7949 (2022)\n4. Portela\, C.M.\, Edwards\, B.W.\, Veysset\, D. et al. “Supersonic Impact Resilience of Nanoarchitected Carbon.” N ature Mater. 20\, 1491–1497 (2021)\n5. Narita\, K.\, Saccone\, M.A.\, Sun\, Y. et al. “Additive manufacturing of 3D batteries: a perspective. ” J Mater Research 37\, 1535–1546 (2022)\n6. Narita\, K.\, et al. “ 3D Architected Carbon Electrodes for Energy Storage” Advanced Energy Mat erials\; 11 (5) (2021)\n7. 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).\n 8. Yee\, D.\, Lifson\, M.\, Greer\, J.R. “Additive Manufacturing of 3D A rchitected Multifunctional Metal Oxides” Advanced Materials 31\, 1901345 (2019).\n9. Vyatskikh\, A.\, Ng\, R. C.\, Briggs\, R.\, Greer\, J.R. “A dditive Manufacturing of High-Refractive-Index\, Nanoarchitected Titanium Dioxide for 3D Dielectric Photonic Crystals” Nano Letters 20 (5) (2020)\ n10. Portela\, C. Vidyasagar\, A.\, Greer\, J.R.\, Kochmann\, D. “Extrem e Mechanical Resilience of Self-assembled Nano-labyrinthine Materials" Pro ceedings of the National Academy of Sciences\, USA 117 (11) (2020)\n\nBio: Julia R. Greer \nRuben F and Donna Mettler Professor of Materials Science\ , Mechanics\, Medical Engineering\n\nGreer’s research focuses on creatin g 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 synthes es of micro- and nano-architected materials using 3D lithography\, nanofab rication\, and additive manufacturing (AM) techniques\, and investigate th eir mechanical\, electrochemical\, electromechanical\, biochemical\, and p hotonic 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 ex ternal dimensionality\, where competing material- (nano) and structure- (a rchitecture) induced size effects drive overall response and govern these properties. Specific topics include applications of 3D nano- and micro-arc hitected materials in devices\, energy absorbing media\, ultra lightweight energy storage systems\, filters for chemically-assisted separation\, dam age-tolerant fabrics\, additive manufacturing\, and smart\, multi-function al materials.\nGreer obtained her S.B. in Chemical Engineering with a mino r 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 PA RC (2005-07). Julia joined Caltech in 2007 and currently is a Ruben F. and Donna Mettler Professor of Materials Science\, Mechanics\, and Medical En gineering at Caltech. \nGreer has more than 170 publications\, has an h-in dex 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 Ser ies at Technion\, David Pope lecture at Penn\, and Thayer Visionaries in T echnology at Dartmouth to name a few)\, the Watson lecture at Caltech\, th e Gilbreth Lecture at the National Academy of Engineering\, the Midwest Me chanics 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-H eeger 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 Technolog y 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) a nd received multiple career awards: Kavli (2014)\, Nano Letters\, SES\, an d TMS (2013)\; NASA\, ASME (2012)\, Popular Mechanics Breakthrough Award ( 2012)\, DOE (2011)\, DARPA (2009)\, and Technology Review’s TR-35\, (200 8). She is an active member of scientific community through professional s ocieties (MRS\, SES\, TMS)\, having organized multiple symposia\, been cho sen as Conference Chair (MRS\, 2021\; GRC 2016)\, served on the Board of D irectors for Society of Engineering Science (SES) and on government agency panels: DOE’s Basic Research Needs workshop on setting Priority Researc h Directions (2020)\, National Materials and Manufacturing Board through N ational Academies (2020)\, and DoD’s Bush Fellows Research Study Team (2 020).\nGreer is the Fletcher Jones Director of the Kavli Nanoscience Insti tute 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)\, a nd as a soloist of Brahms Concerto No. 2 with Redwood Symphony (2006).\n LOCATION:Cambridge University Engineering Department\, LR3B END:VEVENT END:VCALENDAR