Nucleation and growth of Fe and FeO nanoparticles and films on Au(111)
- National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States); Parsons Project Services Inc. South Park, PA (United States)
- National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
We have studied the formation of Fe and FeO nanoparticles and thin films on the reconstructed Au(111) surface. Scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and ion-scattering spectroscopy (ISS) were used to evaluate the structure and composition of Fe and FeO nanoparticles and films at different growth conditions. Iron grows as one monolayer high triangular particles on the Au(111) reconstruction. FeO was grown by exposing the Fe nanoparticles to molecular oxygen at 323 K, followed by annealing at 500-700 K. XPS results indicate that FeO is formed after room temperature oxidation. STM images show that well-ordered iron oxide particles form after annealing to 700 K. STM images also show evidence of a overlayer lattice with a short periodicity of 3.3 angstrom modulated by a larger periodicity of approximately 35 angstrom. The larger periodicity results from a moire pattern formed between the iron oxide overlayer and the underlying Au(111) surface.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy (FE)
- OSTI ID:
- 1015114
- Report Number(s):
- NETL-TPR--1952
- Journal Information:
- Surface Science, Journal Name: Surface Science Journal Issue: 4 Vol. 602; ISSN 0039-6028
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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