Scholarly Seminar: Recent Advancement of Atomic Force Microscopy and Its Applications
May 3, 2017
Hanna Cho, Ph.D.
Department of Mechanical & Aerospace Engineering
Ohio State University
Tuesday, May 23, 2017
Milner Executive Boardroom (0560 MEK)
Abstract: Since the development in the early 1980s, atomic force microscopy (AFM) has been one of the most useful tools in the field of nano- and bioscience. AFM is capable of imaging and characterizing various materials with nanometer-scale spatial resolution under any environmental conditions including in air and liquid. AFM is a matured technology, but the complex dynamics of AFM micro-probe during AFM operation often make it difficult for users to operate the system, interpret the resulting data correctly, and utilize the versatile functionalities of AFM. Based on my firm fundamental background in the nonlinear dynamics at micro/nanoscales, my research has been devoted to advance the state-of-the-art AFM by (i) interpreting the signal generated by a cantilever’s motion; (ii) designing a new cantilever system to obtain more information about material properties; and (iii) developing new (or advanced) techniques to measure multiphysical properties such as piezoelectricity, ferroelectricity, pyroelectricity, and IR absorptivity. This talk will highlight the recent advancement of AFM and its applications to a broad spectrum of research areas.
Bio: Dr. Hanna Cho is an Assistant Professor in the Department of Mechanical and Aerospace Engineering at The Ohio State University since 2015. Dr. Cho earned BS and MS degrees in Mechanical Engineering from Yonsei University, South Korea in 2002 and 2004, and a PhD at the University of Illinois at Urbana-Champaign (UIUC) in 2012. Cho’s research laboratory, the Micro/Nano Multiphysical Dynamics Laboratory, is focused on studying nonlinear dynamics in micro/nanomechanical systems to utilize beneficial nonlinear characteristics in developing novel Micro-Electro-Mechanical Systems (MEMS) such as sensing, imaging and energy harvesting; and multi-physical dynamics arising in atomic force microscopy (AFM) to advance state-of-the-art AFM. She is a Young Faculty Award recipient from Defense Advanced Research Project Agency (DARPA).
Free and open to the public