Semi-Quantitative Information on Dimer Ion Formation in Lsims for Imitator Biomembrane Molecules

Liquid-assisted secondary ion mass spectrometry (LSIMS) is one of the techniques for the analysis of biomembrane molecules because intense molecular ion signals are readily obtained upon fast ion bombardment. Since the analyte is dissolved in a liquid matrix in LSIMS, it is of interest to see the effect of beam bombardment on cluster ion formation as these molecules are known to form micelles in biological systems. In addition, an attempt is made to gain semi-quantitative information on the cluster ions formed in LSIMS where the effect of different substituents on cluster ion interactions is investigated.