Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: Fritz-Haber-Institut     Collection: Chemical Physics     Display Documents



  history
ID: 249337.0, Fritz-Haber-Institut / Chemical Physics
STM studies of ordered (√31x √31)R9° CO islands on Ag(111)
Authors:Kulawik, Maria; Rust, Hans-Peter; Nilius, Niklas; Heyde, Markus; Freund, Hans-Joachim
Language:English
Date of Publication (YYYY-MM-DD):2005-04-25
Title of Journal:Physical Review B
Journal Abbrev.:Phys. Rev. B
Volume:71
Issue / Number:15
Start Page:153405–1
End Page:153405–4
Copyright:© 2005 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The adsorption behavior of CO on Ag(111) is studied using low-temperature scanning tunneling microscopy. At submonolayer coverage, only single CO molecules are observed upon adsorption at 5 K. A further dosage leads to the formation of islands with various shapes and sizes. In addition, clusters with a diameter of about 11 Å are found that are mobile on the surface at 5 K. Though the position of the CO molecules within these clusters cannot be resolved, their size points to CO hexamers or heptamers. Well-ordered CO islands are observed only after heating the sample to 17 K, whereby two rotational domains with hexagonal (√root 31x √root 31)R9° structure are formed. A structural model is proposed in which CO hexamers represent the fundamental building blocks. The existence of two domains is explained with the alternate CO adsorption on the fcc and hcp places within the hexamers. The (√31 x √31)R9° superlattice is the only well-ordered CO structure found in the temperature range between 5 K and 35 K.
Free Keywords:carbon compounds; adsorption; scanning tunnelling microscopy; island structure; monolayers; surface reconstruction; superlattices; carbon-monoxide; metal-surfaces; graphite; adsorption; diffusion; monolayer; molecules; N-2
External Publication Status:published
Document Type:Article
Communicated by:Hans-Joachim Freund
Affiliations:Fritz-Haber-Institut/Chemical Physics/Atomic Force Microscopy
Fritz-Haber-Institut/Chemical Physics/Chemical Physics
Identifiers:URL:http://link.aps.org/abstract/PRB/v71/e153405
DOI:10.1103/PhysRevB.71.153405
Full Text:
You have privileges to view the following file(s):
e153405.pdf  [496,00 Kb]   
 
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.