期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 49, 页码 14685-14689出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201505890
关键词
energy transfer; mass spectrometry; molecular dynamics; velocity map imaging; water
资金
- Agence Nationale de la Recherche Francaise [ANR-06-BLAN-0319, ANR-10-BLAN-0411]
- Agence Nationale de la Recherche (ANR) [ANR-10-BLAN-0411, ANR-06-BLAN-0319] Funding Source: Agence Nationale de la Recherche (ANR)
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.
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