Davila Stephen J, Birdwell David O, Verbeck Guido F
Department of Chemistry, University of North Texas, Denton, Texas 76201, USA.
Rev Sci Instrum. 2010 Mar;81(3):034104. doi: 10.1063/1.3361041.
We have recently developed a soft-landing (SL) instrument that is capable of depositing ions onto substrates for preparative and developmental research of new materials using a laser ablation source. This instrument was designed with a custom drift tube and a split-ring ion optic for the isolation of selected ions. The drift tube allows for the separation and thermalization of ions formed after laser ablation through collisions with an inert bath gas. These collisions allow the ions to be landed at energies below 1 eV onto substrates. The split-ring ion optic is capable of directing ions toward the detector or a landing substrate for selected components. Experiments will be shown ablating Cu using an Nd:YAG (1064 and 532 nm) for cluster formation and landing onto a muscovite (mica) surface. The laser ablation of Cu in 8 Torr of He gas gives a spectrum that contains multiple peaks corresponding to Cu(n), Cu(n)O(m) clusters, and their corresponding isomers. Atomic force microscopy and drift tube measurements were performed to characterize the performance characteristics of the instrument.
我们最近开发了一种软着陆（SL）仪器，该仪器能够使用激光烧蚀源将离子沉积到基板上，用于新材料的制备和开发研究。该仪器设计有定制的漂移管和裂环离子光学器件，用于分离选定的离子。漂移管允许通过与惰性缓冲气体碰撞来分离和热化激光烧蚀后形成的离子。这些碰撞使离子能够以低于1电子伏特的能量着陆到基板上。裂环离子光学器件能够将离子导向探测器或选定成分的着陆基板。将展示使用Nd:YAG（1064和532纳米）激光烧蚀铜以形成团簇并着陆到白云母（云母）表面的实验。在8托氦气中对铜进行激光烧蚀会产生一个光谱，该光谱包含多个对应于Cu(n)、Cu(n)O(m)团簇及其相应异构体的峰。进行了原子力显微镜和漂移管测量以表征该仪器的性能特征。
