高强度VUV激光溅射质谱成像装置
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- 英文论文题名：High intensity VUV laser ablation mass spectrometry
- 论文作者：王佳 ; 莫宇翔
- 英文论文作者：Jia Wang ; Yuxiang Mo ; Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics ; Tsinghua University
- 年：2016
- 作者机构：清华大学物理系;
- 论文关键词：真空紫外激光 ; 四波混频 ; 质谱分析
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十四分会：化学动力学
- 语种：中文
- 分类号：TH843
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十四分会 ; 化学动力学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：229k
- 原文格式：D
- 会议级别：全国
摘要
高强度真空紫外激光,特别是波长短于130 nm的VUV光,用于激光溅射质谱有广泛的应用前景。在不添加基质的情况下,现在的技术很难获取固体样品的有机大分子质谱。然而,波长短于130 nm的VUV光,其单光子能量大于9 eV,能使大多数有机大分子电离;而且固体表面对VUV光有很强的吸收,有可能无需基质就可产生大质量分子离子。另一方面,VUV光由于其波长较短,对应的空间分辨率也将会较常规紫外光有大幅度提高,有可能进行亚微米的质谱空间成像。我们实验室已初步建成一套高强度VUV质谱成像装置。该装置利用四波混频方法,将三束平行激光束通过汞蒸气池,产生了波长为125 nm、光强约为100μJ/pulse的VUV激光。VUV激光聚焦在磷脂膜上形成了规则的孔洞,初步实现了直径约为40μm VUV光斑。同时,也获得了有机小分子-尼罗红的质谱,其结果与文献吻合~([1])。
The high intensity VUV laser(around 125nm) was obtained in mercury cell by using four wave mixing method with three unfocused laser beams. The Intensity of the VUV laser is around 100 μJ/pulse, and the spot size about 40 μm, which is determined by the regular shapes on the sample after focusing the VUV laser onto the sample of phospholipid membrane. What's more, the mass spectrometry of Nile red has been observed, which has a good agreement with the results of ref. [1].
The high intensity VUV laser(around 125nm) was obtained in mercury cell by using four wave mixing method with three unfocused laser beams. The Intensity of the VUV laser is around 100 μJ/pulse, and the spot size about 40 μm, which is determined by the regular shapes on the sample after focusing the VUV laser onto the sample of phospholipid membrane. What's more, the mass spectrometry of Nile red has been observed, which has a good agreement with the results of ref. [1].
引文
[1]Kuznetsov,I.,Filevich,J.,Dong,F.,Woolston,M.,Chao,W.,Anderson,E.H.,Bernstein,E.R.,Crick,D.C.,Rocca,J.J.,and Menoni,C.S.Nat Commun.2015,6,6944.