报告内容摘要：

Material properties are governed by their chemical composition and intrinsic crystalline structures. This fundamentally limits material properties and their applicability creating trade-offs for selecting materials for applications. For example, few solid materials exist considerably lighter than water.  To decrease the density beyond this point, materials must have a porosity, which comes at the cost of a disproportional degradation of other desirable properties.

We create materials that defy existing scaling laws in nature by architecting multi-scale 3D micro-architectures and compositions. These materials are as light as carbon aerogels, but with orders of magnitude higher stiffness and strength.    I will discuss a suite of scalable additive micro- and nano manufacturing technologies to enable fast manufacture of precise multi-scale three-dimensional architectures spanning over 7 orders of magnitude with a variety of material compositions. Attention is focused on how additive manufacturing techniques will enable processing the unprocessable, from structural composites to multi-functional colloids comprised of inorganic- and organic feedstock. Next, we examine the vast new property space unleashed from the new degrees of freedom brought by manufacturing and design, including rapid recreation of materials with tailored structural and multi-functional behaviors. In the last part of the talk I will discuss a suite of new applications: from assembly free energy transduction devices to intelligent infrastructures with time and spatially resolved self-sensing capabilities.

报告人简介：

Dr. Xiaoyu “Rayne” Zheng (formerly at Virginia Tech) is an Assistant Professor at University of California, Los Angeles and directs the Advanced Manufacturing and Metamaterials Laboratory.  His group draws from the principles of mechanics, optics and material science to develop the next generation of additive manufacturing techniques and processes capable of arbitrary, hierarchical 3D architected materials for multiple applications. He received his Ph.D. degree in Mechanical Engineering from Boston University in 2011 with the Outstanding Dissertation Award on developing optical-mechanical microsystems for cell mechanics measurement. Zheng has published over 40 journal articles, proceeding papers and book chapters, including cover articles on Science and Nature Materials. His work on architected metamaterials has been selected as one of the top 10 innovations of 2015 by MIT Technology Review. He received the Additive Manufacturing Young Researcher Award, DARPA Young Faculty Award, Outstanding Assistant Professor Award at Virginia Tech, the Office of Naval Research Young Investigator Award, the Air Force Young Investigator Award, 3M Faculty Award, ICTAS Junior Faculty Award, JMR Paper of the Year from Material Research Society, and the Director’s Award for Publication Excellence from LLNL and the Outstanding Doctoral Dissertation Award.

欢迎广大老师和研究生参加！