Growth mechanisms of Pd nanofilms electrodeposited onto Au(111): an in situ grazing incidence X-ray diffraction study
Literature Information
Maurizio De Santis
Electrochemical deposition of ultra-thin Pd films onto Au(111) single crystals in a solution containing chloride was studied with in situ surface X-ray diffraction measurements. We report a detailed description of the growth mode, as well as film morphology and lattice parameters as a function of thickness, from 2 up to 10 monolayers (ML) as equivalent thickness. An almost ideal layer-by-layer pseudomorphic growth is observed up to two deposited ML. For higher thicknesses, it is followed by the growth of large 3D Pd bulk-like islands. They are about 20 ± 5 ML high and ∼220 Å in diameter for the Pd4ML film and occupy only about 20% of the surface. Their height increases faster than their size with the Pd deposited amount. We could clearly show that chlorides do not play any role in inhibiting the three-dimensional growth of Pd/Au(111) films. We could also unequivocally correlate the features observed by electrochemical surface characterisation in an acidic medium with the detailed structure obtained by diffraction.
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










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