$Surface fractal dimension of small metallic particles$

Surface fractal dimension of small metallic particles

The surface structure of small metal particles (Au) is characterized by use of electron microscopy techniques. It is found that the surface has a very extensive roughness which can be described by means of a fractal dimension. A new method is reported to measure the fractal dimension by image-proces...

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Veröffentlicht in:	Physical review letters 1986-11, Vol.57 (20), p.2552-2555
Hauptverfasser:	ROMEU, D, GOMEZ, A, PEREZ-RAMIREZ, J. G, SILVA, R, PEREZ, O. L, GONZALEZ, A. E, JOSE-YACAMAN, M
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Defects and impurities in crystals microstructure Exact sciences and technology Materials science Metals, semimetals and alloys Physics Solid surfaces and solid-solid interfaces Specific materials Structure of solids and liquids crystallography Surface structure and topography Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:	The surface structure of small metal particles (Au) is characterized by use of electron microscopy techniques. It is found that the surface has a very extensive roughness which can be described by means of a fractal dimension. A new method is reported to measure the fractal dimension by image-processing techniques, and computer measurements. Different values of the fractal dimension are found for Au, Pt, and Pd particles depending on particle preparation and surface treatment. It is found that the fractal dimension of small metallic particles changes after a methanation reaction. 9 ref.--AA
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.57.2552