Published July 2007 | Version v1
Journal article Metadata-only

Secondary ion emission from peptide thin films by ion irradiation

Creators

  • 1. Kyoto Univ., Dept. of Nuclear Engineering, Kyoto (Japan)
  • 2. Kyoto Univ., Quantum Science and Engineering Center, Kyoto (Japan)

Description

Secondary ion emission from peptide samples bombarded with ion beams was investigated by time-of-flight mass spectrometry. Protonated and deprotonated peptide ions respectively, were observed with high sensitivity in positive and negative ion spectra under 500 keV ion bombardment. A reduction in fragmentation was observed in the negative ion mode compared with the positive one. In addition, the results show that large molecules are desorbed more efficiently with ion irradiation at high energy than at low energy. (author)

Additional details

Publishing Information

Journal Title
Annual Report of Quantum Science and Engineering Center
Journal Volume
9
Journal Page Range
p. 48-50
ISSN
1345-0700

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
39108874
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
AMINO ACIDS; ARGON; COPPER; FRAGMENTATION; ION BEAMS; IONS; IRRADIATION; KEV RANGE; MOLECULES; PEPTIDES; SECONDARY EMISSION; THIN FILMS; TIME-OF-FLIGHT MASS SPECTROMETERS
Descriptors DEC
BEAMS; CARBOXYLIC ACIDS; CHARGED PARTICLES; DYNAMIC MASS SPECTROMETERS; ELEMENTS; EMISSION; ENERGY RANGE; FILMS; FLUIDS; GASES; MASS SPECTROMETERS; MEASURING INSTRUMENTS; METALS; NONMETALS; ORGANIC ACIDS; ORGANIC COMPOUNDS; PROTEINS; RARE GASES; SPECTROMETERS; TIME-OF-FLIGHT SPECTROMETERS; TRANSITION ELEMENTS

Optional Information

Notes
4 refs., 4 figs.