Photoelectrochemically induced periodical deposition patterns of platinum on p-InP. Part 1: experiment and observations

文献情報

出版日 2003-02-03

DOI 10.1039/B212806N

インパクトファクター 3.676

著者

Axel Barkschat, Ludwig Pohlmann, Helmut Tributsch, Jürgen K. Dohrmann

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要旨

Platinum was deposited photocathodically on single-crystalline p-InP from hexachloroplatinate(IV) in buffered aqueous solution (pH 2). A scanning optical microscope set up equipped with a He/Ne-laser (632.8 nm) was used for producing the deposits at different electrode potentials and under variable conditions of light exposure time and intensity. This was done in different spatially confined regions of the electrode surface, which were laser-scanned continuously each along a line. In unstirred solution spatially periodical patterns of platinum deposits (period length 13–19 µm) showing regular variations in the amount of platinum and concomitant oscillations of the deposition photocurrent were observed. The periodicity of the pattern was almost invariant with changes of potential, light intensity and scan speed of the laser spot. Scanning electron microscopy demonstrated that the pattern arises from an agglomerate of platinum grains (diameter ca. 0.3 µm) having a periodically varying number per unit area. The tendency of pattern formation was diminished in stirred solution. The observations are discussed qualitatively.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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.

Photoelectrochemically induced periodical deposition patterns of platinum on p-InP. Part 1: experiment and observations

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