“Mechanics of Stretchable Electronics: Theory and Experiment”
Dr. Jianliang Xiao, The University of Illinois at Urbana-Champaign
Recently developed materials and mechanics concepts yield classes of integrated circuits that offer the electronic performance of conventional wafer-based devices but with the mechanical properties of a rubber band. The resulting technology enables applications that are impossible for hard, planar integrated circuits that exist today. Examples range from surgical and diagnostic implements that integrate with the human body to provide advanced therapeutic capabilities, to structural health monitors and inspection systems for civil engineering. The most successful approaches use semiconductor nanomaterials, ranging from silicon nanoribbons to carbon nanotubes, in optimized layouts bonded at strategic locations to soft elastomer substrates. The controlled mechanics of buckling in these structures provide means to accommodate large strain deformations without fracture. This talk discusses the fundamental mechanics of these systems through combined experimental and theoretical studies. We demonstrate use of the resulting knowledge in electronic eyeball-type cameras, whose imaging characteristics offer advantages over comparable systems that use conventional flat detector arrays.
Jianliang Xiao is a postdoc in Dr. John Rogers’ group in the Department of Materials Science and Engineering at the University of Illinois at Urbana-Champaign. He received his PhD in mechanical engineering in December 2009 from Northwestern University under the supervision of Dr. Yonggang Huang. His research interests include experimental and theoretical study of stretchable/flexible electronics, modeling of low-dimensional nanomaterials, and the mechanics of stiff thin films on compliant substrates.