In situ STM investigation of Stranski-Krastanov growth of Ag on Au(111) electrodes

S. G. Corcoran, G. S. Chakarova, K. Sieradzki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We present in situ scanning tunneling microscopy (STM) results which show the morphological aspects of Ag electrodeposition on Au (111). The experimental conditions enabled us to follow, in real time, with monolayer resolution, the morphological details of Stranski-Krastanov (SK) growth under a fixed electrochemical potential (constant supersaturation). Two epitaxial layers of Ag were sequentially formed prior to the heterogeneous nucleation of three-dimensional Ag crystallites. STM images ate presented showing that the second silver monolayer has a coarsened (surface) diffusion-limited-aggregation growth front. Immediately after the completion of the second silver monolayer which took approximately five minutes, we observed the formation of 3D clusters preferentially at step edges. Our analysis of the SK growth process indicates that it is not well described by heterogeneous-nucleation thermodynamics owing to the almost identical lattice parameters of Ag and Au. Instead, we argue that the wetting-nonwetting transition we observed was kinetically stabilized by the relatively high activation energy involved with the motion of Ag adatoms over a descending Ag step.

Original languageEnglish (US)
Title of host publicationMechanisms of Thin Film Evolution
EditorsSeshu B. Desu, David B. Beach, Bruce W. Wessels, Suleyman Gokoglu
PublisherPubl by Materials Research Society
Pages103-109
Number of pages7
ISBN (Print)1558992162
StatePublished - Jan 1 1994
Externally publishedYes
EventProceedings of the 1993 Fall Meeting of the Materials Research Society - Boston, MA, USA
Duration: Nov 29 1993Dec 2 1993

Publication series

NameMaterials Research Society Symposium Proceedings
Volume317
ISSN (Print)0272-9172

Other

OtherProceedings of the 1993 Fall Meeting of the Materials Research Society
CityBoston, MA, USA
Period11/29/9312/2/93

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'In situ STM investigation of Stranski-Krastanov growth of Ag on Au(111) electrodes'. Together they form a unique fingerprint.

Cite this