Time‐of‐flight secondary ion mass spectrometry using a new primary ion beam generated by vacuum electrospray of a protic ionic liquid, propylammonium nitrate

Fujiwara, Yukio; Saito, Naoaki

doi:10.1002/rcm.7960

Cited by 12 publications

(1 citation statement)

References 59 publications

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“…Fujiwara and coworkers reported that the massive cluster ion beam generated by the vacuum electrospray of a protic ionic liquid was useful in increasing protonated molecular species. 20 ) Massive gold cluster ions have been studied using LMIS techniques by several research groups. 21 ) Precursor peptide molecular ion yield enhancements of 1,000 were measured by comparing SIMS spectra obtained using Au + and Au 4+ 400 primary ions, 22 ) and very high secondary ion yields (>1) were also obtained for various biomolecules in experiments run in the event-by-event bombardment-detection mode.…”

Section: Introductionmentioning

confidence: 99%

Development of a Vacuum Electrospray Droplet Ion Gun for Secondary Ion Mass Spectrometry

et al. 2018

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Atmospheric pressure electrospray had been used in previous studies to generate massive water droplet ion beams, and the beams successfully achieved efficient desorption/ionization of biomolecules, low damage etching of polymers and nonselective etching of metal oxides. However, this droplet ion beam was not practical as a primary ion beam for surface analysis instruments because it required differential pumping and lacked adequate beam current and density. To improve the beam performance, we have proposed to use vacuum electrospray of aqueous solutions as a beam source, and developed a technique for producing a stable electrospray of aqueous solution in vacuum. We also designed a prototype of a vacuum electrospray droplet ion gun, and measured the beam properties. Finally, the applicability of this ion gun in secondary ion mass spectrometry is discussed.

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Section: Introductionmentioning

confidence: 99%