Speaker
Description
Nanoparticle (NP) mass spectrometry in the gas phase is a unique way
to characterize individual isolated particles and thus assess their
intrinsic properties, NP-to-NP variability and structural evolution,
e.g. in studies on charging mechanisms [1], photophysics [2] or high
temperature reaction kinetics [3]. Our group focuses on cryogenic
experiments to employ absorption spectroscopy, based on adsorption of
messenger atoms or molecules on the NP surface and their desorption
driven by laser heating with rates that are proportional to the
absorption cross section [4]. An overview is given over the related
goals, challenges and progress in charge state control, fluorescence
thermometry [5] with the aim for temperature controlled experiments,
and quantitative characterization of the adsorption on a NP surface.
[1] M. Grimm et al., Phys. Rev. Lett. 96, 066801 (2006)
[2] V. Dryza et al., Phys. Chem. Chem. Phys. 15, 20326 (2013)
[3] C. Y. Lau et al., J. Phys. Chem. C 127 (31), 15157 (2023)
[4] B. Hoffmann et al., J. Phys. Chem. Lett. 11, 6051 (2020)
[5] S. C. Leippe et al., J. Phys. Chem. C 128 (50), 21472 (2024)
