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首页> 外文期刊>Quantum Beam Science >Large Molecular Cluster Formation from Liquid Materials and Its Application to ToF-SIMS
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Large Molecular Cluster Formation from Liquid Materials and Its Application to ToF-SIMS

机译：从液体材料的大分子簇形成及其在TOF-SIMS中的应用

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Since molecular cluster ion beams are expected to have various chemical effects, they are promising candidates for improving the secondary ion yield of Tof-SIMS. However, in order to clarify the effect and its mechanism, it is necessary to generate molecular cluster ion beams with various chemical properties and systematically examine it. In this study, we have established a method to stably form various molecular cluster ion beams from relatively small amounts of liquid materials for a long time by the bubbling method. Furthermore, we applied the cluster ion beams of water, methanol, methane, and benzene to the primary beam of SIMS and compared the molecular ion yields of aspartic acid. The effect of enhancing the yields of [M+H]+ ion of aspartic acid was found to be the largest for the water cluster and small for the methane and benzene clusters. These results indicate that the chemical effect contributes to the desorption/ionization process of organic molecules by the molecular cluster ion beam.
机译：由于预期分子聚类离子束具有各种化学效果，因此它们是提高TOF-SIMS的二次离子产量的候选物。然而，为了阐明效果及其机制，有必要产生具有各种化学性质的分子聚类离子束，并系统地检查它。在这项研究中，我们已经建立了一种方法来通过鼓泡方法从相对少量的液体材料稳定地形成各种分子聚类离子束。此外，我们将水，甲醇，甲烷和苯的聚类离子束施加到初级光束中，并比较了天冬氨酸的分子离子产率。发现甲烷和苯簇的水簇最大的增强[M + H] +离子的产率的效果是最大的。这些结果表明，化学效果有助于分子聚类离子束对有机分子的解吸/电离过程。

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