While laser ablation is often used to create clusters, laser desorption at lower fluences can be used to probe clusters already present on a surface or van der Waals clusters formed between desorbed species and gas phase atoms. As an example of the former we discuss a study of para amino benzoic acid dimers. The dimers are formed by laser desorbing the monomer into a supersonic expansion. With the technique of laser desorption jet cooling it is also possible to form van der Waals clusters and species in the drive gas. As an example we discuss the spectroscopy of triphenylamine/argon clusters. Finally, the same technique allows the study of species on the surface, rather than clusters formed by the volatilization itself. A dramatic example is the formation of carbon clusters by laser ablation in a separate step and their subsequent study by laser desorption.
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机译：虽然激光消融通常用于产生簇，但是在较低的流量下的激光解吸可以用于探测已经存在于去吸收物种和气相原子之间形成的表面或范德瓦尔群簇上的簇。作为前者的一个例子，我们探讨了对氨基苯甲酸二聚体的研究。二聚体通过激光去吸收单体成超声波膨胀而形成。利用激光解吸喷射的技术冷却，还可以在驱动气体中形成van der WaaS簇和物种。作为一个例子，我们讨论了三苯胺/氩簇的光谱。最后，相同的技术允许研究表面上的物种，而不是由挥发本身形成的簇。戏剧性的例子是通过激光消融在单独的步骤中形成碳簇，并通过激光解吸进行后续研究。
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