Microsystems & Nanorobots Actuated by Light, Magnetic Fields, & 3D Ultrasound - Prof. Peer Fischer

This presentation is part of the 2020 Distinguished Seminar Series. Abstract Inspired by Richard Feynman’s famous lecture “There’s plenty of room at the bottom”, researchers are striving to build synthetic motors, machines, and robots ‘bottom up’ from the nanoscale. However, despite progress in crafting static structures of increasing complexity, truly functional dynamic machines are still in their infancy. Building and powering artificial structures that operate at the microscale is very challenging, as it is generally not possible to translate actuation mechanisms and design-concepts from the macro- to the nanoscale. At this scale different physical phenomena are important and there are no ready-made motors and no off-the-shelf parts. In this talk I will describe the fabrication and operation of “nanobots” that can be controlled in fluids with light and magnetic fields and that are able to penetrate cells and complex biological tissues. Another means of power transfer to operate microdevices is via sound fields. However, existing technologies to manipulate sound have been lacking. I will discuss new means of shaping ultrasound and describe how it can be used to obtain the most sophisticated sound fields to date, and how this can be used for the directed assembly of cells and for “one-shot” parallel 3D fabrication. Bio Peer Fischer directs the Micro Nano and Molecular Systems Lab at the Max Planck Institute for Intelligent Systems, and he is a Professor at the Institute of Physical Chemistry, Univ. of Stuttgart. He received a BSc. degree in Physics from Imperial College London and a Ph.D. from the University of Cambridge. He was a NATO Postdoctoral Fellow at Cornell University, and a Rowland Fellow at Harvard where he headed an interdisciplinary research lab for five years. Peer Fischer won a Fraunhofer Attract Award, two European Union ERC Grants, and a World Technology Award. He is a member of the Max Planck – EPFL Center for Molecular Nanoscience and Technology, and the research network on Learning Systems with ETH Zurich. Prof. Fischer is an Editorial Board Member of the journal Science Robotics and a Fellow of the Royal Society of Chemistry. Peer Fischer has broad research interests including 3d nanofabrication & assembly, micro- and nano-robotics, active matter, interaction of optical, electric, magnetic, and acoustic fields with matter at small length scales, chirality, and molecular systems engineering. --------------------------------------- Visit the University of Toronto's Department of Mechanical & Industrial Engineering: https://www.mie.utoronto.ca/