Coverage-dependent Orientations of Dy@C82Molecules on Au(111) Surface

Autor:	Zhen-peng Hu, Feng-yun Chen
Rok vydání:	2012
Předmět:	Surface (mathematics) Crystallography Adsorption Chemistry law Monolayer Close-packing of equal spheres Molecule Substrate (electronics) Physical and Theoretical Chemistry Scanning tunneling microscope Overlayer law.invention
Zdroj:	Chinese Journal of Chemical Physics. 25:423-428
ISSN:	2327-2244 1674-0068
DOI:	10.1088/1674-0068/25/04/423-428
Popis:	The adsorption and molecular orientation of Dy@C82 isomer I on Au(111) has been investigated using ultrahigh-vacuum scanning tunneling microscopy at 80 K. At low coverages, the Dy@C82 molecules tend to grow along the step edges of Au(111), forming small clusters and molecular chains. Adsorption of Dy@C82 on the edges is dominated by the fullerene-substrate interaction and presents various molecular orientations. At higher coverages, the Dy@C82 is found to form ordered islands consisting of small domains of equally oriented molecules. The Dy@C82 molecules in the islands prefer the adsorption configurations with the major C2 axis being approximately parallel to the surface of the substrate. Three preferable orientations of the Dy@C82 molecules are found in a two-dimensional hexagonal close packed overlayer. These observations are attributed to the interplay of the fullerene-substrate interaction and dipole-dipole interaction between the metallofullerenes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::29416cac66f4672e31e69ce6a14bb0c0 https://doi.org/10.1088/1674-0068/25/04/423-428 Zobrazit plný text záznamu