AI Article Synopsis
- A new instrument called NAP-VMI allows researchers to study how molecules scatter off surfaces at near-ambient pressures, bridging the gap between surface science and catalysis.
- The device uses ion optics to create a controlled environment that maintains vacuum while manipulating high-pressure ionization.
- Initial tests show promising results with various chemical reactions, suggesting NAP-VMI could be beneficial for diverse experiments like photoelectron spectroscopy and interactions involving liquids.
Article Abstract
We present a new velocity map imaging instrument for studying molecular beam surface scattering in a near-ambient pressure (NAP-VMI) environment. The instrument offers the possibility to study chemical reaction dynamics and kinetics where higher pressures are either desired or unavoidable, adding a new tool to help close the "pressure gap" between surface science and applied catalysis. NAP-VMI conditions are created by two sets of ion optics that guide ions through an aperture and map their velocities. The aperture separates the high pressure ionization region and maintains the necessary vacuum in the detector region. The performance of the NAP-VMI is demonstrated with results from NO photodissociation and N scattering from a Pd(110) surface, which are compared under vacuum and at near-ambient pressure (1 × 10 mbar). NAP-VMI has the potential to be applied to, and useful for, a broader range of experiments, including photoelectron spectroscopy and scattering with liquid microjets.
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| http://dx.doi.org/10.1063/5.0098495 | DOI Listing |
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