Wednesday 16:00 pm - 17:15 pm FIT seminar room

livMatS Colloquium | Prof. Thomas Hermans (University of Strasbourg) | Controlling self-assembly by chemical fuels and light

Actin or microtubule (MT) cytoskeletal networks, achieve dynamics as well as supramolecular structures with the same protein building blocks. In other words, the components can assemble, but also react (i.e., tubulin is also an enzyme that hydrolyses guanosine triphosphate GTP), which in turn affects the assemblies. In this way, living systems use chemical fuels (e.g., GTP) and self-assembly to create a built-in chemomechanical interaction. Moreover, such networks operate in sustained out-of-equilibrium states at the onset of oscillations,[1–3] which results in rapid response and adaptivity. Here, I present recent[4–9] chemical reaction networks in solution and gels, where interesting new behaviors were found, such as supramolecular size oscillations, traveling polymerization, or transient assembly. We hope such reaction cycles form the basis of new life-like materials where material properties are fuel (and waste) dependent.

[1] H. Obermann, E. M. Mandelkow, G. Lange, E. Mandelkow, Journal of Biological Chemistry 1990, 265, 4382–4388.
[2] O. Valiron, N. Caudron, D. Job, Cellular and Molecular Life Sciences CMLS 2001, 58, 2069–2084.
[3] C. Westendorf, J. Negrete, A. J. Bae, R. Sandmann, E. Bodenschatz, C. Beta, Proceedings of the National Academy of
Sciences 2013, 110, 3853–3858.
[4] N. Singh, B. Lainer, G. J. M. Formon, S. De Piccoli, T. M. Hermans, J. Am. Chem. Soc. 2020, 142, 4083–4087.
[5] J. Leira-Iglesias, A. Tassoni, T. Adachi, M. Stich, T. M. Hermans, Nature Nanotechnology 2018, 13, 1021.
[6] N. Singh, A. Lopez-Acosta, G. J. M. Formon, T. M. Hermans, J. Am. Chem. Soc. 2022, 144, 410–415.
[7] A. Sharko, D. Livitz, S. De Piccoli, K. J. M. Bishop, T. M. Hermans, Chem. Rev. 2022, 122, 11759–11777.
[8] C. Chen, J. S. Valera, T. B. M. Adachi, T. M. Hermans, Chemistry A European J 2023, 29, DOI
[9] A. Sharko, B. Spitzbarth, T. M. Hermans, R. Eelkema, J. Am. Chem. Soc. 2023, 145, 9672–9678.

Brief Bio
Thomas Hermans is Senior Research Professor at IMDEA Nanociencia (Madrid) and group leader of the Systems Chemistry Laboratory since December 2023. He studied Chemical Engineering and Chemistry at the Eindhoven University of Technology (2000-2006), followed by a PhD at the faculty of Biomedical Engineering under the supervision of Prof. E.W. (Bert) Meijer (2006-2010). Next, he joined the group of Prof. Bartosz Grzybowski at Northwestern University as a postdoctoral fellow (2010-2013). He started his independent research group in 2013 at ISIS (Institut de Science et d’Ingénierie Supramoléculaires, Strasbourg, France) and promoted to full professor in 2019.