David Flannigan

David Flannigan

Assistant Professor
Contact Information
Education
  • B.S., Chemistry, University of Minnesota, 2001
  • Ph.D., Chemistry, University of Illinois at Urbana-Champaign, 2006
  • Postdoctoral Scholar, Chemistry, California Institute of Technology, 2007-2010
  • Senior Postdoctoral Scholar, Chemistry, California Institute of Technology, 2011-2012

Research Areas

Recent News:

Research Interests

Our research program deals broadly with the experimental elucidation of non-equilibrium electronic and structural dynamics of inorganic, organic, and biological materials with atomic-scale spatial and femtosecond temporal resolutions. To achieve this, we use ultrafast four-dimensional electron microscopy (UEM). With UEM, we bring together the high spatial resolution of transmission electron microscopy with the ultrafast temporal resolution of short-pulsed lasers. We are able to directly visualize, in real-time, a wide variety of phenomena, including how crystal lattices respond to the excitation and relaxation of charge-carriers, the collective and coherent motions of lattices at the unit cell level, the real-space dynamics of nanoscale architectures and the effects of interfacial forces, and the effects of charge-transfer reactions on structure. Our group is highly interdisciplinary and collaborative, and our interests are broad, having foundations in materials science and engineering, chemistry, and physics. Our current interests are in three related but distinct areas: (1) energy transport and conversion in polycrystalline materials, (2) structural dynamics, phase transitions, and energy transport properties of quantum materials and complex metal oxides, and (3) determining the atomic-scale origins of the dynamic properties of soft matter and biological materials. The unifying goal of our work is to understand how atomic structure and dynamics lead to the emergence of bulk properties in materials; that is, how quantum and continuum mechanics are linked and how properties in this mesoscale spatial regime can be controlled.

Awards

  • Beckman Young Investigtor Award, 2015-2019
  • McKnight Land-Grant Professor, 2014-2016
  • ACS PRF Doctoral New Investigator Grant, 2012-2014
  • 3M Nontenured Faculty Award, 2013-2016
  • Phi Kappa Phi Love of Learning Award, 2012, 2013

Selected Publications

  • Cremons, D. R.; Plemmons, D. A.; Flannigan, D. J. Femtosecond Electron Imaging of Defect-Modulated Phonon Dynamics. Nat. Commun. 2016, 7, 11230.
  • Cremons, D. R.; Flannigan, D. J. Direct In Situ Thermometry: Variations in Reciprocal-Lattice Vectors and Challenges with the Debye-Waller Effect. Ultramicroscopy 2016, 161, 10.
  • Jiang, Y.; Liu, J.; Suri, P. K.; Thadhani, N. N.; Flannigan, D. J.; Wang, J.-P. Preparation of an α"-Fe16N2 Magnet via a Ball Milling and Shock Compaction Approach. Adv. Eng. Mater. 2016, 18, xx-xx. (Early View)
  • Plemmons, D. A.; Suri, P. K.; Flannigan, D. J. Probing Structural and Electronic Dynamics with Ultrafast Electron Microscopy. Chem. Mater. 2015, 27, 3178.
  • Kieft, E.; Schliep, K. B.; Suri, P. K.; Flannigan, D. J. Effects of Thermionic-Gun Parameters on Operating Modes in Ultrafast Electron Microscopy. Struct. Dyn. 2015, 2, 051101.
  • Plemmons, D. A.; Park, S. T.; Zewail, A. H.; Flannigan, D. J. Characterization of Fast Photoelectron Packets in Weak and Strong Laser Fields in Ultrafast Electron Microscopy. Ultramicroscopy 2014, 146, 97.
  • Flannigan, D. J.; Lourie, O. 4D Ultrafast Electron Microscopy Sheds Light on Dynamic Processes from the Micrometer to the Atomic Scale. Microsc. Anal. 2013, 27, S5.
  • Flannigan, D. J.; Zewail, A. H. 4D Electron Microscopy: Principles and Applications. Acc. Chem. Res. 2012, 45, 1828.
  • Park, S. T.; Flannigan, D. J.; Zewail, A. H. 4D Electron Microscopy Visualization of Anisotropic Atomic Motions in Carbon Nanotubes. J. Am. Chem. Soc. 2012, 134, 9146.
  • Park, S. T.; Flannigan, D. J.; Zewail, A. H. Irreversible Chemical Reactions Visualized in Space and Time with 4D Electron Microscopy. J. Am. Chem. Soc. 2011, 133, 1730.

Contact Information

Department of Chemical Engineering and Materials Science

421 Washington Ave. SE, Minneapolis, MN 55455-0132

P: 612-625-1313 | F: 612-626-7246

Contact Us

Connect on Social Media

© Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. Privacy Statement