Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation
Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation
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DOI：
10.1016/j.jasms.2007.12.008
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发表时间：
2008-04
影响因子：
3.2
通讯作者：
F. Aubriet;J. Muller
中科院分区：
文献类型：
--
作者：
F. Aubriet;J. Muller
为了更好地了解无机团簇离子的形成过程，研究了过渡金属氧化物的激光烧蚀。对二元氧化物混合物和产生的离子的相对分布的研究表明，激光/物质相互作用后发生的三种显著机制产生了观察到的离子物种集合。分子复合反应、单分子解离过程、包括过渡金属氧化物样品的分子氧在内的小分子中性物质的发射，或从气相中排出的物种的发射似乎是一个重要的机制，特别是在高激光照度条件下。这些过程被用来提出一套使光子轰击下形成的离子团簇的包络合理化的途径。
Laser ablation of transition-metal oxides have been investigated to better understand the formation processes of inorganic cluster ions. The study of binary oxide mixtures and the relative distribution of the ions produced suggest three salient mechanisms that occur after laser/matter interaction, that function to produce the observed ensemble of ionic species. Molecular recombination reactions, unimolecular dissociation processes, emission of small neutrals, including molecular oxygen from transition-metal oxide samples, or from species expelled in gas phase appear to be a significant mechanism, especially under high laser irradiance conditions. These processes are used to propose a set of pathways to rationalize the envelope of ionic clusters formed under photon bombardment.