Dresden 2020 – scientific programme

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BP: Fachverband Biologische Physik

BP 20: Poster VIII

BP 20.8: Poster

Tuesday, March 17, 2020, 14:00–16:00, P2/4OG

Investigating nanoplasmonic membranes as cellular strain sensors — •Peter Kolb and Kay-E. Gottschalk — Institute of Experimental Physics, Ulm University, Ulm, Germany

Metallic nanoparticles (NPs) display specific electromagnetic resonances, known as localized surface plasmon resonances (LSPR). These LSPRs strongly depend on the size and geometry of the NPs [1], as well as the local environment of the particles. Coupling between closely spaced NPs creates resonance dependence on their inter-particle distances. Since a change in this distance leads to a shift of the LSPR, nanoplasmonic membranes can be used as strain sensors [2]. The combination of gold NPs and polydimethylsiloxane (PDMS) substrate offers a biocompatible membrane that can be used for in vitro studies. Combining electron beam lithography, electron beam evaporation, dry lift-off, and reactive ion etching, we produce gold NP arrays on PDMS membranes. These nanoplasmonic membranes are analysed via scanning electron microscopy, atomic force microscopy, and spectroscopy. Supported by electromagnetic simulations, we investigate their properties and suitability as cellular strain sensors.

References:

[1] Chen, Yiqin, et al., Reliable fabrication of nanostructures without an adhesion layer using dry lift-off. Nanotechnology 26.40 (2015): 405301.

[2] Maurer, Thomas et al., The beginnings of plasmomechanics: towards plasmonic strain sensors. Frontiers of Materials Science 9.2 (2015): 170-177.