TY - JOUR
T1 - AFM study of the structure of underpotentially deposited Ag and Hg on Au(111)
AU - Chen, Chun hsien
AU - Gewirth, Andrew A.
N1 - Funding Information:
We thank Scott Veseckyf or his help duringa n earlyp haseo f this project.C .-H.C. acknowledges a Universityo f Illinois Fellowshipi n Chemistry. A.A.G. acknowledgeas PresidentiaYl oung In-vestigatoAr ward (CHE-90-57953w) ith matching funds generouslyp rovided by Digital Instruments,I nc. and EG&G InstrumentsT.h is work was funded by the Department of Energy (DEFG02 91 ER45439) through the Materials ResearchL aboratorya t the Universityo f Illinois.
PY - 1992/7
Y1 - 1992/7
N2 - The AFM was utilized to determine the structure of underpotentially deposited monolayers of Ag and Hg on Au(111) electrode surfaces. Monolayers of Ag exhibit different structures in different electrolytes. Specifically, in sulfate we find a 3×3 structure, in nitrate, a 4×4 structure, in perchlorate another open structure, and in acetate a close-packed 1×1 structure. The packing density of Ag in each system correlates with the size of the electrolyte, with larger anions yielding more open structures. Monolayers of Hg exhibit a hexagonal structure with a 0.58 nm atom-atom distance in sulfate, nitrate, and perchlorate electrolytes. The insensitivity of structure to electrolyte in this system may relate to the substantial partial charge remaining on the Hg. This study suggests that several factors are responsible for the observed monolayer structures.
AB - The AFM was utilized to determine the structure of underpotentially deposited monolayers of Ag and Hg on Au(111) electrode surfaces. Monolayers of Ag exhibit different structures in different electrolytes. Specifically, in sulfate we find a 3×3 structure, in nitrate, a 4×4 structure, in perchlorate another open structure, and in acetate a close-packed 1×1 structure. The packing density of Ag in each system correlates with the size of the electrolyte, with larger anions yielding more open structures. Monolayers of Hg exhibit a hexagonal structure with a 0.58 nm atom-atom distance in sulfate, nitrate, and perchlorate electrolytes. The insensitivity of structure to electrolyte in this system may relate to the substantial partial charge remaining on the Hg. This study suggests that several factors are responsible for the observed monolayer structures.
UR - http://www.scopus.com/inward/record.url?scp=0026898552&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026898552&partnerID=8YFLogxK
U2 - 10.1016/0304-3991(92)90304-3
DO - 10.1016/0304-3991(92)90304-3
M3 - Article
AN - SCOPUS:0026898552
SN - 0304-3991
VL - 42-44
SP - 437
EP - 444
JO - Ultramicroscopy
JF - Ultramicroscopy
IS - PART 1
ER -