OSE Seminar by Dr. Francesca Cavallo on Bent into Shapes: Self-assembly of Inorganic Sheets
Posted: November 8, 2019
Date: Thursday, November 14, 2019
Time: 12:15 PM to 1:15 PM
Location: CHTM, Room 101
Map to CHTM:
ADA Accommodations are available.
Dr. Francesca Cavallo
UNM Electrical and Computer Engineering Department
Inorganic sheets have a thickness ranging from ~0.3 to ~500 nm and 3-5 orders of magnitude larger lateral dimensions. They are flexible, bondable, and mechanically ultra-compliant. They present a new platform to combine bottom-up and top-down materials processing and fabricate various three-dimensional (3D) nanomechanical architectures, with an unprecedented level of control. The bottom-up part is the self-assembly, via wrinkling, rolling, curling, or other forms of shape change of the nanomembranes, with top-down patterning providing the starting point for these processes. The self-assembly to form 3D structures is driven by the relaxation of built-in strain within the sheets or externally applied loads. A variety of structures, including tubes, rings, coils, rolled-up “rugs,” and periodic wrinkles, has been made by such self-assembly. Their geometry and unique properties suggest many potential applications. In this talk, I will describe the design of desired 3D structures based on continuum mechanics modeling, synthesis of 2D strained nanomembranes and release of the strained sheet into 3D or quasi-3D objects. I will then discuss applications of curled and wrinkled sheets in high-frequency sources of electromagnetic radiation, biomedical science, and health care.
Dr. Francesca Cavallo is an assistant professor of Electrical and Computer Engineering and a Principal Investigator at the Center for High Technology Materials within the University of New Mexico (UNM). Her research focuses on the synthesis, assembly, fundamental properties and applications of inorganic sheets. Before joining UNM, Dr. Cavallo was a post-doctoral fellow and a scientist at the University of Wisconsin- Madison. She received her Ph.D. in Electrical Engineering and Information Technology with the highest honors from ‘‘the Chemnitz University of Technology’’ (Germany). Dr. Cavallo’s research homes during her Ph.D. were the Von Klitzing Group at the Max Planck Institute for Solid State Research (Stuttgart, Germany) and the Leibnitz Institute for Metal Research (Dresden, Germany). Dr. Cavallo is the author of 50 refereed articles, 4 patents, 5 patent applications, and several conference proceedings.