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Heidelberg 2015 – scientific programme

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MO: Fachverband Molekülphysik

MO 5: Posters 1: Novelties in Molecular Physics

MO 5.22: Poster

Monday, March 23, 2015, 17:00–19:00, C/Foyer

Laser-induced acoustic desorption of large molecules — •Zhipeng Huang1,3, Daniel A. Horke1, and Jochen Küpper1,2,31Center for Free-Electron Laser Science, DESY, Hamburg — 2Center for Ultrafast Imaging, University of Hamburg — 3Department of Physics, University of Hamburg

State-, conformer-, and size-selection of small neutral molecules can be achieved through the dispersion of the molecular beam with electric fields [1]. State-selected small molecules can then be well aligned and oriented by laser and static electric fields [2]. To extend these techniques to large molecules is currently limited by the ability to produce high densities of neutral large molecules in the gas-phase.

Laser-induced acoustic desorption (LIAD) is a promising technique for gentle and efficient preparation of intact neutral large molecules in vacuum. Here we demonstrate our newly set-up laser-induced acoustic desorption (LIAD) source, which is coupled to a time-of-flight mass spectrometer. We will discuss the efficiency of the source as a function of experimental parameters, such as laser pulse energy, duration and foil parameters, and discuss its potential for applications in x-ray or electron diffraction imaging.

[1] S. Y. T. van de Meerakker et al., Chem. Rev. 112, 4828 (2009); Y.P. Chang et al., Science 342, 98 (2013); T. Kierspel et al., Chem. Phys. Lett. 591, 130 (2014); D. Horke et al., Angew. Chem. Int. Ed. 53, 11965 (2014)

[2] H. Stapelfeldt et al., Rev. Mod. Phys. 75, 543 (2003); S. Trippel et al., Phys. Rev. A 89, 051401(R) (2014); arXiv:1409.2836

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