Investigation of a Simple Pickup Method for Doping Molecules into Water Clusters
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A capillary pickup method was investigated for doping molecules into water clusters, which were produced by supersonic expansion, and underwent a sticking collision with a crossed beam from the capillary. This method was applied to H2O clusters in a beam with pickup of DCl, CH3OH, NH3, CO2 and D2O molecules, however, we found only molecule of DCl can be picked up by water clusters with the capillary configuration in those tested dopants. Meanwhile, two different distances between the capillary to the nozzle were investigated based on the collected mass spectra, and we found that the smaller distance can obtain the stronger mixed cluster intensity.
KeywordsWater clusters Dopants Molecule pickup Capillary pickup method
This work was supported by the Fundamental Research Funds for the Central Universities under Grant No. 2018QNB11, and the measurements were carried out at the Nanocluster Physics Laboratory at the University of Southern California.
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Conflict of interest
The author declares he/she has no conflict of interest.
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