[20a-E203-1~12] 7.5 Ion beams

[20a-E203-8] Useful Ion Yields of Biomolecules Produced by Vacuum Electrospray Droplet Ion Impact

〇Satoshi Ninomiya¹, Lee Chuin Chen¹, Kenzo Hiraoka² (1.Univ. of Yamanashi, 2.Univ. of Yamanashi, CERC)

Keywords:secondary ion mass spectrometry, vacuum electrospray droplet ion, useful yield

We have developed a vacuum electrospray droplet ion (V-EDI) gun as a new massive cluster ion beam for secondary ion mass spectrometry (SIMS). In the previous studies, the V-EDI gun was installed in a semi-commercial time-of-flight SIMS system, and the secondary ion spectra produced by the V-EDI beams were measured for several biomolecular materials. In this study, the useful ion yields of the biomolecules will be determined by calculating the ratio of secondary intact ion yield to the number of molecules sputtered by single ion impact.