Berlin 2018 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 20: Topical session (Symposium MM): Hydrogen in Materials

MM 20.1: Topical Talk

Dienstag, 13. März 2018, 10:15–10:45, H 0107

Sensing Hydrogen with (Single) Nanoparticles — •Christoph Langhammer — Chalmers University of Technology, Göteborg, Sweden

Using particles as signal transducers in a hydrogen sensor offers the ultimate miniaturization limit of the single nanoparticle. At the same time, metallic nanoparticles exhibit localized surface plasmon resonance, which provides unique opportunities for optical sensing. In this talk, I will discuss the concept of (single nanoparticle) nanoplasmonic hydrogen sensing on two examples:

A plastic-plasmonic optical hydrogen sensor platform using PdAu alloy nanoparticles embedded in a polymer matrix acting as molecular sieve, which enables deactivation-resistant hysteresis-free hydrogen detection with unprecedented sub-second response time at room temperature, and with sub-5 ppm detection limit.

Single nanoparticle plasmonic hydrogen sensing as a tool to unravel size-and shape effects in the thermodynamics and hysteresis of metal-hydrogen interactions in individual Pd nanocrystals with different size and shape, as well as to understand the role of grain boundaries in the hydrogenation process of individual polycrystalline Pd nanoparticles.