COE/Structural Mechanics Seminar


Creases and Crinkles for Nanoscale Bio and Quantum Engineering


Prof. Kyung-Suk Kim


Brown University


Thursday, April 25, 2024 at 11:00:00 AM   


GTMI Building, Room Auditorium


Yuhang Hu


Deformation instabilities of soft hyper-elastic elastomers are often used to produce wrinkles and crinkles in 2D materials. Recently, we have revealed the mathematical structure of the inherent hyperelastic crease and cusps that can control a variety of wrinkle and crinkle patterns of 2D materials. The soft/flexible materials of interest include hyperelastic solids such as hydrogels, soft tissues, and single- and multi-layer graphene. In particular, graphene crinkles produce controllable nanoscale electric surface-charge lines that can adsorb, align, and self-assemble biomolecules and nanoparticles. Here, we present a novel scientific method of studying molecular structures and interactions at the single-molecule level with dual-tip AFM atomic lattice interferometry (DT-AFM ALI) imaging. We use the DT-AFM ALI to study molecular epigenetics and quantum moire engineering of graphene/HBN devices.


Kyung-Suk Kim is currently a Professor of Engineering at Brown University, the executive committee representative of the solid mechanics group at Brown, directing the Nano and Micro Mechanics Laboratory. Over the past four decades, he has worked on dynamic plasticity, adhesion science, nonlinear fracture, nanotribology, and ruga mechanics. He received Ph.D. ('80) in Solid Mechanics from Brown University and had postdoctoral training at Caltech ('79-'80). He taught at TAM Department, University of Illinois, Urbana-Champaign, for nine years until he joined Brown as a Professor of Engineering in 1989. He also held visiting faculty positions at Harvard University ('87-'88 and 2002), Cambridge University, U.K. ('96), University of California, Santa Barbara ('97), Distinguished Visiting Scientist at KIST ('08), and Simpson Visiting Faculty Fellow ('13) at Northwestern University. He is a John Simon Guggenheim Fellow ('96), and has advised more than 40 Ph.D. students and postdocs. He received Ho-Am Prize in Engineering in 2005, the Engineering Science Medal from the Society of Engineering Science in 2012, the Drucker Medal from the American Society of Mechanical Engineers in 2016, and delivered the Society of Experimental Mechanics' William M. Murray Lecture, the society's highest honor, in 2019.