Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 4, Pages 1588-1590Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2008.05.004
Keywords
Fragment-free ionization; Cluster ion; TOF; Mass spectrometry
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) for Young Scientists
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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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