Directed assembly of Au and Fe nanoparticles on a TiOx/Pt(111) ultrathin template: the role of oxygen affinity
文献情報
Francesco Sedona, Stefano Agnoli, Gaetano Granozzi, Giovanni Barcaro, Alessandro Fortunelli
The essential role of O affinity in the directed assembly of size-selected Au and Fe nanoparticles (NPs) on a TiOx/Pt(111) ultrathin oxide phase, an effective template for size selected metal NP growth, is revealed through scanning tunneling microscopy and density-functional calculations. A weakly interacting element (Au) diffuses rapidly and gets trapped in the vacancy defects (picoholes) located inside parallel rows (troughs, spaced 1.44 nm apart) peculiar to the film structure, producing size-selected NPs arranged in regular linear arrays aligned along the troughs. In contrast, an element with greater O affinity (Fe) experiences higher diffusion barriers, and the growth is dominated by kinetic effects, with a less effective preferential nucleation and the appearance of irregular NP morphologies.
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掲載誌
Physical Chemistry Chemical Physics

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.










![(2E)-4-[(1R,2S,8R,19S,21R)-14-Hydroxy-11-isopropenyl-8,23,23-trimethyl-5-(3-methyl-2-buten-1-yl)-16,20-dioxo-3,7,22-trioxaheptacyclo[17.4.1.1~8,12~.0~2,17~.0~2,21~.0~4,15~.0~6,13~]pentacosa-4(15),5,13
,17-tetraen-21-yl]-2-methyl-2-butenoic acid structure (2E)-4-[(1R,2S,8R,19S,21R)-14-Hydroxy-11-isopropenyl-8,23,23-trimethyl-5-(3-methyl-2-buten-1-yl)-16,20-dioxo-3,7,22-trioxaheptacyclo[17.4.1.1~8,12~.0~2,17~.0~2,21~.0~4,15~.0~6,13~]pentacosa-4(15),5,13
,17-tetraen-21-yl]-2-methyl-2-butenoic acid structure](https://static.chemtradehub.com/structs/173/173867-04-4-d2d3.webp)



