Properties of C84 and C24H12 molecular ion sources for routine TOF-SIMS analysis

被引：29

作者：

Biddulph, Gregory X. ^{[1
]}

Piwowar, Alan M. ^{[1
]}

Fletcher, John S. ^{[1
]}

Lockyer, Nicholas P. ^{[1
]}

Vickerman, John C. ^{[1
]}

机构：

[1] Univ Manchester, Manchester Interdisciplinary Bioctr, Manchester M1 7DN, Lancs, England

来源：

ANALYTICAL CHEMISTRY | 2007年 / 79卷 / 19期

关键词：

D O I：

10.1021/ac071442x

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

C-84(+) and coronene (C24H12+) have been studied as primary ions for use in secondary ion mass spectrometry. A representative range of samples has been used to compare the effectiveness of each primary ion with the existing C-60(+), Au+, and Au3+ primary ions. It was found that C-84 is the most effective primary ion providing higher secondary ion yields and a high molecular to fragment ion ratio. Coronene had a performance similar to C-60. Coronene and C-60 primary ions were also used to extend a previous study of matrix suppression/enhancement effects. The C-60 was found to ameliorate this effect, possibly due to the increase in protonation in polyatomic sputtering, and coronene was found to further reduce suppression showing evidence of a chemical effect.

引用

页码：7259 / 7266

页数：8

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