Electrochemical Layer-by-Layer Deposition of Pseudomorphic Pt Layers on Au(111) Electrode Surface Confirmed by Electrochemical and In Situ Resonance Surface X‑ray Scattering Measurements

• Published in: Journal of physical chemistry. C Vol. 116; no. 50; pp. 26464 - 26474
• Main Authors: Shibata, Masayo, Hayashi, Naoko, Sakurai, Takara, Kurokawa, Ayumi, Fukumitsu, Hitoshi, Masuda, Takuya, Uosaki, Kohei, Kondo, Toshihiro
• Format: Journal Article
• Language: English
• Published: Columbus, OH American Chemical Society 20.12.2012
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Electrodeposition, electroplating; Exact sciences and technology; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Other nonelectronic physical properties; Physical properties of thin films, nonelectronic; Physics; Structure and morphology; thickness; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Layer by layer growth; Electrodeposition; X-ray scattering; Resonance; Surface scattering; Roughness
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp3101283

Conditions for electrochemical deposition of atomically flat, pseudomorphic Pt layer on Au(111) electrode surface were established based on electrochemical and in situ resonance surface X-ray scattering (RSXS) studies on potential dependence of Pt deposition. When Pt was deposited at relatively large overpotential, a three-dimensionally grown rough Pt layer was formed on a Au(111) surface. When the overpotential was very small, Pt nuclei was formed but did not grow any more. At appropriate overpotential between these two potentials, atomically flat, pseudomorphic Pt layer was grown with a layer-by-layer growth mode.