期刊
APPLIED SURFACE SCIENCE
卷 255, 期 4, 页码 1588-1590出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2008.05.004
关键词
Fragment-free ionization; Cluster ion; TOF; Mass spectrometry
类别
资金
- Japan Society for the Promotion of Science (JSPS) for Young Scientists
In this report, we propose to use the incidence of cluster ions that are much larger than molecular ions as a fragment-free ionization technique for organic secondary ion mass spectrometry. Secondary ions were measured for amino acid and peptide targets bombarded with 3, 8 and 13 keV large Ar cluster ions. The relative yields of the fragment ions decreased drastically with increasing incident cluster size. Fragment-free ionization of the molecule was accomplished when large cluster ions with optimized size and energy were incident on a biomolecular sample. (C) 2008 Elsevier B.V. All rights reserved.
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