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Abstract: Static ToF-SIMS was used to evaluate the effect of gold condensation as a sample treatment prior to analysis. The experiments were carried out with a model molecular layer (Triacontane M =422.4Da), upon atomic (In+) and polyatomic (Bi3 +) projectile bombardment. The results indicate that the effect of molecular ion yield improvement using gold metallization exists only under atomic projectile impact. While the quasi-molecular ion (M+Au)+ signal can become two orders of magnitude larger than that of the deprotonated molecular ion from the pristine sample under In+ bombardment, it barely reaches the initial intensity of (M−H)+ when Bi3 + projectiles are used. The differences observed for mono- and polyatomic primary ion bombardment might be explained by differences in near-surface energy deposition, which influences the sputtering and ionization processes. [Copyright &y& Elsevier]

Abstract: The main purpose of this research is to show the effects of solvent nature, partial charge distribution and polarity index, on the preparation of uniform silane self-assembly monolayers. Octadecyltrichlorosilane (OTS) on silicon wafers was chosen as a case study. Contrary to what was thought before, dipole moment data are not enough and one needs accompanying data on partial charge distribution and polarity index to predict the best solvent for a uniform self-assembled monolayer (SAM). Results can be applied to other monolayer-solvent systems. [Copyright &y& Elsevier]

• TOF-SIMS with gold deposition was proposed as a novel method for quantification. • This method makes it possible to compare the amount of organic additives among different matrix polymers. • This method has a potentiality for the quantification independent of matrices. • Its application to not only additives on polymers but also to other fields such as adhesion or tribology can be realized. A novel method for the quantification of organic additives on polymer surfaces was investigated using time-of-flight secondary ion mass spectrometry (TOF-SIMS) with gold deposition. Pentaerythritol tetrakis (3- (3,5-di- tert -butyl-4-hydroxyphenyl) propionate and tris (2,4-di- tert -butylphenyl) phosphite were used as typical organic additives, and polystyrene (PS), polymethyl methacrylate (PMMA) and polyethylene terephthalate (PET) were used as typical polymers for this investigation. Gold deposition on polymer film surfaces containing various concentrations of additives made TOF-SIMS analysis possible for quantitative evaluation of the additives from negative ion mass spectra among the different matrices. This method is expected to be expanded to the absolute quantification of organic materials on polymer surfaces, not only with respect to additives on polymers but also for other fields such as adhesion or tribology. [ABSTRACT FROM AUTHOR]