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A general method for controlling and resolving rotational orientation of molecules in molecule-surface collisions.


ABSTRACT: The outcome of molecule-surface collisions can be modified by pre-aligning the molecule; however, experiments accomplishing this are rare because of the difficulty of preparing molecules in aligned quantum states. Here we present a general solution to this problem based on magnetic manipulation of the rotational magnetic moment of the incident molecule. We apply the technique to the scattering of H2 from flat and stepped copper surfaces. We demonstrate control of the molecule's initial quantum state, allowing a direct comparison of differences in the stereodynamic scattering from the two surfaces. Our results show that a stepped surface exhibits a much larger dependence of the corrugation of the interaction on the alignment of the molecule than the low-index surface. We also demonstrate an extension of the technique that transforms the set-up into an interferometer, which is sensitive to molecular quantum states both before and after the scattering event.

SUBMITTER: Godsi O 

PROVIDER: S-EPMC5424257 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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A general method for controlling and resolving rotational orientation of molecules in molecule-surface collisions.

Godsi Oded O   Corem Gefen G   Alkoby Yosef Y   Cantin Joshua T JT   Krems Roman V RV   Somers Mark F MF   Meyer Jörg J   Kroes Geert-Jan GJ   Maniv Tsofar T   Alexandrowicz Gil G  

Nature communications 20170508


The outcome of molecule-surface collisions can be modified by pre-aligning the molecule; however, experiments accomplishing this are rare because of the difficulty of preparing molecules in aligned quantum states. Here we present a general solution to this problem based on magnetic manipulation of the rotational magnetic moment of the incident molecule. We apply the technique to the scattering of H<sub>2</sub> from flat and stepped copper surfaces. We demonstrate control of the molecule's initia  ...[more]

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