This contribution is devoted to study of the thermal stability and growth of gold nanoparticles supported on SiO2/Si(111) and Al2O3/SiO2/Si(111) as a function of initial cluster size, support material and level of surface coverage. Experimental evidence for “flipping” of two dimensional cluster structures from vertical orientation to horizontal on the support is presented.
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Vajda, S., Winans, R.E., Elam, J.W. et al. Supported gold clusters and cluster-based nanomaterials: characterization, stability and growth studies by in situ GISAXS under vacuum conditions and in the presence of hydrogen. Top Catal 39, 161–166 (2006). https://doi.org/10.1007/s11244-006-0052-3
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DOI: https://doi.org/10.1007/s11244-006-0052-3
Keywords
- laser vaporization
- gold clusters
- cluster structure
- molecular beam
- size selection
- soft-landing
- supported clusters
- surface coverage
- sintering
- thermal stability
- heat treatment
- agglomeration
- oxide support
- alumina
- silica
- SiO2
- Al2O3
- support effect
- grazing incidence small angle X-ray scattering
- 2-dimensional growth
- 3-dimensional growth
- hydrogen atmosphere
- aggregation
- ALD film
- GISAXS
- isomerization