Characteristics of a charged-droplet beam generated by vacuum electrospray of an ionic liquid

Yukio Fujiwara, Naoaki Saito, Hidehiko Nonaka, Taisuke Nakanaga, Shingo Ichimura

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To develop a cluster ion beam source for secondary ion mass spectrometry (SIMS), beam characteristics of charged droplets electrosprayed in a vacuum were investigated using a room-temperature molten salt (i.e., an ionic liquid). A target current exceeding 200 nA was produced at a capillary voltage of 1.5 kV even with a low flow rate of 0.05 μL/min. Efficiency of beam generation varied with increasing capillary voltage and flow rate. Additionally, m/z values of emitted charged particles were investigated by a time-of-flight technique. In addition to masses and charge numbers, radii of the charged droplets were examined.

Original languageEnglish
Pages (from-to)335-339
Number of pages5
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - 2011 Jan 7


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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