液体材料形成大分子团簇及其在ToF-SIMS中的应用

IF 1.3 Q3 INSTRUMENTS & INSTRUMENTATION
K. Moritani, Shogo Nagata, A. Tanaka, K. Goto, N. Inui
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引用次数: 1

摘要

由于分子团簇离子束预计具有各种化学效应,它们是提高Tof-SIMS二次离子产率的有前途的候选者。然而,为了阐明这种效应及其机理,有必要产生具有各种化学性质的分子团簇离子束并对其进行系统的研究。在本研究中,我们建立了一种通过鼓泡法从相对少量的液体材料中长期稳定形成各种分子团簇的离子束的方法。此外,我们将水、甲醇、甲烷和苯的团簇离子束应用于SIMS的初级束,并比较了天冬氨酸的分子离子产率。发现提高天冬氨酸[M+H]+离子产率的效果对于水团簇最大,对于甲烷和苯团簇较小。这些结果表明,化学效应有助于分子簇离子束对有机分子的解吸/电离过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Large Molecular Cluster Formation from Liquid Materials and Its Application to ToF-SIMS
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.
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来源期刊
CiteScore
2.80
自引率
28.60%
发文量
27
审稿时长
11 weeks
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