Dr. Ofer Kedem

Dr. Ofer Kedem
Dr. Ofer KedemMarquette University

Wehr Chemistry Building, 533

MilwaukeeWI53201United States of America
The Kedem Lab

Assistant Professor



Ph.D., Weizmann Institute of Science

M.Sc., Weizmann Institute of Science

B.Sc., Tel-Aviv University

Research Interests

Designing and exploring dynamic functional nanomaterials

The Kedem Group develops and explores the behavior of dynamic nanomaterials, with the ultimate goal of creating autonomous nanosystems, capable of independently sensing their environment, communicating, and regulating their own motion and chemical reactivity. Such systems raise fascinating fundamental scientific questions relating to the behavior of interacting ensembles of molecules and nanoparticles, complex feedback cycles, non-equilibrium (dissipative) materials, and motion driven by asymmetric structures and potentials. The applications of autonomous nanosystems venture into the realm of science fiction, with autonomous nanobots treating disease and injury in the body, breaking down environmental contaminants, and powering accurate reaction control for non-thermodynamic reaction products, even in nanoscale reactors. The work is often inspired by biological designs, and takes a physical chemistry approach to understand the intricate behaviors observed.

Researchers will engage in a variety of activities, including inorganic nanoparticle synthesis and characterization, nanoparticle functionalization, organic ligand synthesis, catalyst development, functionalization of complex surface monolayers, design and fabrication of microfluidic system for nanoparticle transport, development of electronic devices to explore light-matter interactions, and simulations of dynamic systems. The varied nature of the research offers opportunities for students and researchers of all chemical backgrounds, with different experiences and interests allowing for cross-pollination and shared growth.

Professional Experience

Ofer Kedem grew up in Rehovot, Israel, and obtained a B.Sc. in Chemistry at Tel-Aviv University (2007), followed by a M.Sc. (2009) and Ph.D. (2013) in Chemistry with Prof. Israel Rubinstein at the Weizmann Institute of Science. With Prof. Rubinstein, Ofer studied plasmonic Au nanoparticles, explored their interaction with dielectric materials in the context of bio-sensing; and the way the particles modify the emission properties (intensity, lifetime and even emission wavelength) of fluorescent materials. Driven by his interest in dynamic systems, Ofer then started a postdoctoral position with Emily A. Weiss at Northwestern University’s Department of Chemistry and the Center for Bio-inspired Energy Science (CBES). He used experiments and simulations to study non-equilibrium transport powered by a ratcheting mechanism, which uses local asymmetric fields combined with an energy input to enable transport. In August 2019, Ofer is joining the chemistry faculty at Marquette University as an Assistant Professor.

Selected Publications

  1. Ofer Kedem and Emily A. Weiss. Cooperative Transport in a Multi-Particle, Multi-Dimensional Flashing Ratchet. J. Phys. Chem. C, 2019, 123, 6913-6921
  2. Ofer Kedem, Bryan Lau, and Emily A. Weiss. How to drive a flashing electron ratchet to maximize current. Nano Lett., 2017, 17, 5848–5854
  3. Ofer Kedem, Bryan Lau, Mark A. Ratner, and Emily A. Weiss. A Light-Responsive Organic Flashing Electron Ratchet. Proc. Natl. Acad. Sci. U.S.A., 2017, 114, 8698-8703
  4. Ofer Kedem, Bryan Lau, and Emily A. Weiss. Mechanisms of Symmetry Breaking in a Multidimensional Flashing Particle Ratchet. ACS Nano, 2017, 11, 7148–7155
  5. Ofer Kedem, Wendel Wohlleben, and Israel Rubinstein. Distance-Dependent Fluorescence of Tris(bipyridine)ruthenium(II) on Supported Plasmonic Gold Nanoparticle Ensembles. Nanoscale, 2014, 6, 15134-15143
  6. Ofer Kedem, Alexander Vaskevich, and Israel Rubinstein. Critical Issues in Localized Plasmon Sensing. J. Phys. Chem. C, 2014, 118, 8227-8244
  7. Ofer Kedem, Takumi Sannomiya, Alexander Vaskevich, and Israel Rubinstein. Oscillatory Behavior of the Long-Range Response of Localized Surface Plasmon Resonance Transducers. J. Phys. Chem. C, 2012, 116, 26865–26873
  8. Ofer Kedem, Alexander B. Tesler, Alexander Vaskevich, and Israel Rubinstein. Sensitivity and Optimization of Localized Surface Plasmon Resonance Transducers. ACS Nano, 2011, 5, 748–760

Faculty & Staff


Department of Chemistry

Todd Wehr Chemistry, 101
1414 W Clybourn St.
Milwaukee, WI 53233
(414) 288-3515

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