补充剂的电离和效率的离子和电子喷射从纳米滴的
Jakob D Asmussen1, Ltaief Ben Ltaief1, Keshav Sishodia2
1Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark.
The Journal of chemical physics
|July 17, 2023
概括
优化 (He) 纳米滴体大小是检测质谱学和光电离子谱学中多离子的关键. 这项研究确定了在不同电离模式下最大限度地提高离子产量的最佳液滴大小.
科学领域:
- 原子和分子物理 原子和分子物理
- 物理化学 物理化学
- 纳米级科学科学 纳米级科学
背景情况:
- (He) 纳米滴对于分离和研究剂分子至关重要.
- 有效的离子和电子检测对于这些系统的光电化谱学和质谱学至关重要.
- 了解H纳米滴中的多邦电离动力学对于实验成功至关重要.
研究的目的:
- 系统地研究纳米滴尺寸对离子和电子产量的影响.
- 为了确定最佳的He纳米滴体大小,以最大限度地提高多离子检测.
- 为了比较不同电离机制 (电荷转移和宁电离) 的离子产量.
主要方法:
- 使用商用四极质谱仪和光电子-光离子巧合谱仪.
- 研究纯和化 (O2,Li) 他纳米滴在一个广泛的尺寸范围.
- 研究了两种电离机制:直接电离和通过共振光激发的二次电离.
主要成果:
- 为了最大限度地提高O2和离子产量的最佳He纳米滴大小,在电荷转移和Penning电离两方面都被确定.
- 电荷转移电离产生了最高的离子信号,用于5x10^4 He原子的滴.
- 宁离子化显示,每滴水中~10^3 (O2) 和~10^5 (Li) He原子的最佳产量.
结论:
- 该研究提供了对优化He纳米滴条件的关键见解,用于质谱学和光电离子谱学.
- 结果指导选择适当的纳米滴体大小,以提高多邦离子检测效率.
- 这项工作有助于推进在H纳米滴中分离的分子和复合物的研究.
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