期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 81, 期 3, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3361041
关键词
atomic force microscopy; laser ablation
资金
- Air Force Office of Scientific Research Young Investigator Research Award [AFOSR-BAA-2007-7]
- University of North Texas Faculty Research
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, CunOm clusters, and their corresponding isomers. Atomic force microscopy and drift tube measurements were performed to characterize the performance characteristics of the instrument.
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