I’m Ofer Kedem, a postdoctoral fellow at the Department of Chemistry and the Center for Bio-inspired Energy Research (CBES) at Northwestern University, working in the research group of Prof. Emily Weiss.
In August 2019 I’ll be starting as an Assistant Professor of Physical Chemistry at Marquette University. See more details in my new lab site, www.kedemlab.com.
My training is in chemistry, with a focus on nanoscience. I am currently working on far-from-equilibrium systems, specifically electronic ratcheting mechanisms. I obtained a B.Sc. (2007) in chemistry from Tel-Aviv University, and an M.Sc. (2009) and Ph.D. (2013) in chemistry from the Weizmann Institute of Science. The latter two were under the supervision of Prof. Israel Rubinstein, and involved the study of localized surface plasmon resonance (LSPR) systems, mainly in a sensing context.
Research in brief
My past, present, and future work all revolve around the creation and study of functional nano-systems – combining nano-scale elements, probing them in different ways, and observing their behavior. By building new systems, one can encounter new behaviors, and gain insights into physical laws and emergent properties. My graduate work involved plasmonic (LSPR) gold nanoparticles, both as colloids and as nano-island films. I studied their interaction with each-other, with dielectric materials, and with fluorescent molecules. These studies produced basic knowledge about those interactions, as well as actionable information for the design of effective bio-sensors using plasmonic particles. Currently, as a postdoctoral fellow, I study the non-equilibrium devices known as ratchets, which use local asymmetries on the scale of tens-to-hundreds of nanometers to produce transport of particles such as electrons. The transport mechanism is fundamentally different from the common bias-driven transport, and is inspired by biological motors. The mechanism has a variety of interesting and unintuitive properties, which make it both a challenging and a highly-rewarding topic to study. I survey my past work on this site, in the pages titled “Plasmonics” and “Ratchets”.