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Type: 
Journal
Description: 
Nanofingers of gold covered by porphyrins are prepared by a combination of atomic manipulation and surface self‐organization. A submonolayer of zinc (II) 5, 10, 15, 20‐tetrakis (4‐tert‐butylphenyl)‐porphyrin (ZnTBPP) axially ligated to a self‐assembled monolayer of 4‐aminothiophenol (4‐ATP) on Au (111) is prepared and studied using a combination of ultrahigh vacuum techniques. Under the electric field produced by the STM tip, the relatively weakly bound Au surface atoms along the discommensuration lines become mobile due to the strong bond to 4‐ATP, while the tendency of the porphyrins towards self‐assembly result in a collective motion of gold clusters. The clusters diffuse onto the surface following well‐defined pathways along the \rm11\rm2 direction and then reach the step edges where they assembled, thus forming nanofingers. First‐principles density functional theory calculations demonstrate the …
Publisher: 
WILEY‐VCH Verlag
Publication date: 
1 Apr 2008
Authors: 

Valentina Arima, Robert IR Blyth, Francesca Matino, Letizia Chiodo, Fabio Della Sala, Julie Thompson, Tom Regier, Roberta Del Sole, Giuseppe Mele, Giuseppe Vasapollo, Roberto Cingolani, Ross Rinaldi

Biblio References: 
Volume: 4 Issue: 4 Pages: 497-506
Origin: 
small