报告题目：

 Recent Progress in Ruga Mechanics and Its Applications

报告人:                Professor Kyung-Suk Kim

Brown University

时间：2018年6月21日(周四) 9:30         

地点：中国科学院力学研究所1号楼小礼堂

报告摘要：

When one folds a thin solid film at the nanoscale, the film can be transformed to multifunctional nanostructures for various applications including transparent electric circuits, self-cleaning surfaces, oil-spill cleaning cloths and self-adjusting friction grips. Such self-organized nanostructures can be controlled by ruga mechanics of soft materials and/or thin films. The Latin word ruga means a state of a wrinkle, crease, fold, ridge, crumple and crinkle to form various 1-D or 2-D patterns. As multi-scale surface morphologies of rugae determine effective properties such as wetting, adhesion, adsorption, friction, flexoelectric and optoelectronic properties, ruga state control is considered as a viable method for real-time regulation of effective material properties at the nano- and micro-scale. And thus, ruga mechanics of soft-materials and/or thin films enables us to develop innovative applications of nano- and micro-structures. Here, we present recent progress in fundamental study of ruga mechanics and couple of successful application examples. One is characterization of soft orifice and its applications for nano and bio-medical technologies, and the other is analysis of graphene crinkles and its applications for molecular informatics.

报告人简介：

Kyung-Suk Kim has 38 years of experience as an engineering science faculty and is currently Professor of Engineering at Brown University, and the Director of the Center for Advanced Materials Research (2014 - ).  He received Ph.D. ('80) in Solid Mechanics from Brown University.  He taught at TAM Department, University of Illinois, Urbana-Champaign for 9 years until he joined Brown as Professor of Engineering in 1989. Over the past 10 years he was also appointed as Distinguished Visiting Scientist at KIST (’08) and Simpson Visiting Faculty Fellow (’13) at Northwestern University.  

His research interests are in scale-bridging mechanics and nano and micromechanics of solids. Through his research on dynamic properties of solids, adhesion and friction, fragmentation, ruga mechanics, and mechanics of  nanostructures, he has invented numerous new scientific instruments and analytical methods. He has advised more than 37 PhD students and Postdocs. He is a recipient of the Melville Medal (1981), JEP best paper award (1999), and Drucker Medal (2016) from ASME, the John Simon Guggenheim Fellowship (1996), the Ho-Am Prize in Engineering (2005), the Kwan-Ak Distinguished Alumni Award of Seoul National University (2012), the Engineering Science Medal from the Society of Engineering Science (2012). His research on “New Math for Designer Wrinkles” was selected as the Top 100 Science Stories, Discover, January/February, 2015.