Growth, Structure, and Stability of Au on Ordered ZrO2(111) Thin Films

• DOI: 10.1021/jp201960t
• Publication Date: 2011-05-10T13:14:41Z
• Authors: Yonghe Pan; Yan Gao; Guodong Wang; Dandan Kong; Liang Zhang; Jianbo Hou; Shanwei Hu; Haibin Pan; Junfa Zhu
• Keywords: Low-energy electron diffraction; Thermal Stability

The growth, electronic properties, and thermal stability of Au nanoparticles on ordered ZrO2(111) thin film surfaces were investigated by low-energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS), synchrotron radiation photoemission (SRPES). films grown a Pt(111) substrate. At room temperature, initially grows as 2D islands the up to 0.1 ML, followed 3D growth with number density ∼1.4 × 1012 particles/cm2. binding energy 4f peaks shifts monotonically toward higher decreasing particle size 0.4 eV, which can be attributed contribution from both initial- final-state effects. atoms most likely form Auδ− become metallic states coverage increases. Thermal annealing experiments demonstrate that particles experience significant sintering before desorption surface. In addition, are more thermally stable sputtered surface than pristine due stronger bonding defect sites. Moreover, large small ones