邀请讲座人：Julia R. Greer 教授

简介：Julia R. Greer，加州理工学院材料科学、力学和医学工程教授，麻省理工学院化学工程学士，斯坦福大学材料科学与工程硕士、博士。已发表论文260余篇，引用次数为11406，h因子50。美国国家安全科学与工程学院会士，美国国家工程院Gilbreth讲师，曾获美国材料研究学会早期职业奖(Kavli Early Career Award)，世界经济论坛（2014）全球青年领袖奖，技术评论前十名新兴技术奖(Tech Review’s Top-10 Emerging Technologies)，ACS纳米快报青年研究员奖(ACS Nano Letters Young Investigator Award and Lectureship)等。同时，她也是位钢琴家，在多个重要场合举行专场演奏并获得荣誉。

【报告题目】Materials by Design:Three-Dimensional (3D) Nano-Architected 

                       Meta-Materials

时间:  上午10:30-12:00, 2018年7月16日（周一）

地点:  银河国际4556强度楼205会议室

摘要：Creation of extremely strong and simultaneously ultra lightweight materials can be achieved by incorporating architecture into material design. We fabricate three-dimensional (3D) nano-architected materials that can exhibit superior and often tunable 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 overall structural complexity.

We describe the fabrication and synthesis using two-photon lithography, nanofabrication, and additive manufacturing (AM) techniques, as well as the mechanical, biochemical, electrochemical, and thermal 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) threedimensional nano-architected meta-materials and their applications in chemical and biological devices, ultra lightweight energy storage systems, damage-tolerant fabrics, and photonic crystals.

Some Relevant publications:

1. A.Vyatskikh, S. Delalande, A. Kudo, X. Zhang, and J. R. Greer “Additive Manufacturing of 3D Nano-Architected Metals” Nature Communications (2018)

2. L. R. Meza, S. Das, J. R. Greer “Strong, Lightweight and Recoverable Three-Dimensional Ceramic Nanolattices” Science 345, 1322-1326 (2014)

3. D. Yee, M. D. Schulz, R. H. Grubbs, J. R. Greer “Functionalized three dimensional nano-architectures via thiol-Michael addition and two-photon lithography” Advanced Mater 29, 1605293 (2017)

4. M. Lifson, M.-W. Kim, J.R. Greer, and B.-J. Kim “Enabling Simultaneous Extreme Ultra Low-k in Stiff, Resilient, and Thermally Stable Nano-Architected Materials” Nano Letters 17 (12), 7737–7743 (2017)

5. A. Maggi, H. Li, and J.R. Greer “3-D Nano-Architected Scaffolds with Tunable Stiffness for Efficient Bone Tissue Growth” Acta Biomater. 63, 294-305 (2017)

6. L. Meza, et al., J.R. Greer “Hierarchy in 3-D Architected Meta-Materials Brings Resilience” Proc of the Nat’l Academy of Sciences 112 (37), 11502 (2015)

7. X. Xia, C. V. Di Leo, X. W. Gu, A. Lozano, J. R. Greer “In Situ Lithiation– Delithiation of Mechanically Robust Cu–Si Core–Shell Nanolattices in a Scanning Electron Microscope” ACS Energy Letters 1, 492–499 (2016)

8. V. Chernow, H. Alaeian, J. Dionne, J.R. Greer “"Polymer Nanolattices as Mechanically Tunable 3-Dimensional Photonic Crystals" Appl. Phys. Lett 107, 101905 (2015).

握手学术前沿，探究科学奥秘，材料学人在此齐聚，怎能没有你？

讲座可盖章！