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PGI-1 Talk: Dr. Enno Kätelhön

Single-entity analysis at the nanoscale: Recent developments in electrochemistry

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13 Sep 2017 11:30
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PGI Lecture Hall

Dept. of Chemistry, University of Oxford

Abstract:

One of the latest and most considerable advances in electrochemistry is the nano-impact technique, which enables the detection and characterisation of individual nanoparticles, viruses, bacteria, and possibly enzymes. The significance of this technique particularly arises from its broad applicability and simplicity in terms of the experimental set-up and procedure: An electrode is set in contact with a solution comprising a suspension of particles of interest and is biased versus the solution potential. By virtue of Brownian motion, individual entities of the analyte then stochastically impact on the electrode surface, where they give rise to transient currents, Faradaic or capacitive, and an analysis provides insight into the nature of the impacting entity as well as the prevalent reaction mechanism.
The talk commences with a broad overview of the nano-impact technique while particularly theoretical aspects are highlighted. We then turn to examples of theoretical work on stochastic processes and the feasibility of individual enzyme detection to illustrate topics that are currently researched. In the light of recent developments, the talk finally points out future challenges and opportunities in the theory of nano-impacts.

Contact

Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Fax: +49 2461 61-2850
email: s.bluegel@fz-juelich.de

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