Abstract
To develop an ion source capable of producing a charged-droplet beam at higher current density with a smaller beam spot size, beam characteristics of electrosprayed charged particles were investigated. A quaternary ammonium ionic liquid, N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl) amide (DEME-TFSA), was tested in vacuum around 10-5 Pa. A hysteresis behavior in the electrosprayed current was observed when the capillary voltage was changed. The m/z values of generated charged droplets decreased with decreasing flow rate and increasing capillary voltage and temperature. Average masses and charge numbers of the charged droplets as well as projectile energy per nucleon were estimated on the basis of the experimental results.
Original language | English |
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Pages (from-to) | 517-521 |
Number of pages | 5 |
Journal | Surface and Interface Analysis |
Volume | 45 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2013 Jan |
Externally published | Yes |
Keywords
- SIMS
- charged droplet
- electrospray
- ion source
- ionic liquid
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry