Organic secondary ion mass spectrometry: Signal enhancement by water vapor injection |
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Authors: | Taoufiq Mouhib Arnaud Delcorte Claude Poleunis Patrick Bertrand |
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Affiliation: | aInstitute of Condensed Matter and Nanosciences–Bio and Soft Matter (IMCN/BSMA), Université catholique de Louvain, Louvain-la-Neuve, Belgium |
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Abstract: | The enhancement of the static secondary ion mass spectrometry (SIMS) signals resulting from the injection, closely to the sample surface, of H2O vapor at relatively high-pressure, was investigated for a set of organic materials. While the ion signals are generally improved with increasing H2O pressure upon 12 keV Ga+ bombardment, a specific enhancement of the protonated ion intensity is clearly demonstrated in each case. For instance, the presence of H2O vapor induces an enhancement by one order of magnitude of the [M+ H]+ static SIMS intensity for the antioxidant Irgafos 168 and a ∼1.5-fold increase for polymers such as poly(vinyl pyrrolidone). |
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