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Velocity of a Molecule Evaporated from a Water Nanodroplet: Maxwell-Boltzmann Statistics versus Non-Ergodic Events.

ABSTRACT: The velocity of a molecule evaporated from a mass-selected protonated water nanodroplet is measured by velocity map imaging in combination with a recently developed mass spectrometry technique. The measured velocity distributions allow probing statistical energy redistribution in ultimately small water nanodroplets after ultrafast electronic excitation. As the droplet size increases, the velocity distribution rapidly approaches the behavior expected for macroscopic droplets. However, a distinct high-velocity contribution provides evidence of molecular evaporation before complete energy redistribution, corresponding to non-ergodic events.

SUBMITTER: Abdoul-Carime H

PROVIDER: S-EPMC4678507 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature

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Velocity of a Molecule Evaporated from a Water Nanodroplet: Maxwell-Boltzmann Statistics versus Non-Ergodic Events.

Abdoul-Carime Hassan H Berthias Francis F Feketeová Linda L Marciante Mathieu M Calvo Florent F Forquet Valérian V Chermette Henry H Farizon Bernadette B Farizon Michel M Märk Tilmann D TD

Angewandte Chemie (International ed. in English) 20151016 49

The velocity of a molecule evaporated from a mass-selected protonated water nanodroplet is measured by velocity map imaging in combination with a recently developed mass spectrometry technique. The measured velocity distributions allow probing statistical energy redistribution in ultimately small water nanodroplets after ultrafast electronic excitation. As the droplet size increases, the velocity distribution rapidly approaches the behavior expected for macroscopic droplets. However, a distinct ...[more]

PMID: 26473406

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