Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 17, Issue 39, Pages 25761-25771Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cp00061k
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Funding
- ETH Zurich
- Swiss National Science Foundation (SNF) [200021_146368]
- NSERC
- Swiss National Science Foundation (SNF) [200021_146368] Funding Source: Swiss National Science Foundation (SNF)
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We report on a new instrument that allows for the investigation of weakly-bound molecular aggregates under equilibrium conditions (constant temperature and pressure). The aggregates are formed in a Laval nozzle and probed with time-of-flight mass spectrometry in the uniform postnozzle flow; i.e. in the equilibrium region of the flow. Aggregates over a very broad size range from the monomer to particle sizes of 10-20 nm can be generated and studied with this setup. Soft ionization of the aggregates is performed with single photons from a homemade vacuum ultraviolet laser. The mass spectrometric detection provides molecular-level information on the size and chemical composition of the aggregates. This new instrument is useful for a broad range of cluster studies that require well-defined conditions.
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