Self-assembly of aromatic thiols on Au(111)

Q. Jin, J. A. Rodriguez, C. Z. Li, Y. Darici, Nongjian Tao

Research output: Contribution to journalArticle

143 Citations (Scopus)

Abstract

We have studied the self-assembly of two aromatic thiols, 4-mercaptopyridine (4MPY) and 4-hydroxythiophenol (4HTP), on Au(111) from aqueous solutions with in situ scanning tunneling microscopy and ex situ X-ray photoelectron and Auger electron spectroscopies. Upon adsorption of the molecules, islands of nanometer scale appear immediately on flat Au(111) terraces, which is in sharp contrast to the formation of depressions in the self-assembly of the n-alkanethiol monolayers. The islands increase both in size and number initially, and decrease slowly after reaching maximum values in about 15 min. The formation of the islands can be attributed to the Au atoms on the surface which become highly mobile due to the strong binding to the thiols. The decrease of the islands at the late stage is due to the fact that atoms in small islands diffuse into nearby big islands and surface step edges. Both 4MPY and 4HTP molecules are randomly distributed on the surface immediately after adsorption, but slowly arrange into domains of ordered structures. For 4MPY the ordered structure has lattice constants, a = 5.1±0.3 angstroms, b = 15.8±0.3 angstroms and α = 78±3°, whereas 4HTP packs into a (√3×√3)R30° lattice.

Original languageEnglish (US)
Pages (from-to)101-111
Number of pages11
JournalSurface Science
Volume425
Issue number1
DOIs
StatePublished - Apr 9 1999
Externally publishedYes

Fingerprint

Sulfhydryl Compounds
thiols
Self assembly
self assembly
Adsorption
Atoms
Molecules
Scanning tunneling microscopy
Auger electron spectroscopy
Photoelectrons
Lattice constants
Monolayers
X rays
adsorption
Auger spectroscopy
electron spectroscopy
atoms
4-thiopyridine
scanning tunneling microscopy
molecules

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Jin, Q., Rodriguez, J. A., Li, C. Z., Darici, Y., & Tao, N. (1999). Self-assembly of aromatic thiols on Au(111). Surface Science, 425(1), 101-111. https://doi.org/10.1016/S0039-6028(99)00195-8

Self-assembly of aromatic thiols on Au(111). / Jin, Q.; Rodriguez, J. A.; Li, C. Z.; Darici, Y.; Tao, Nongjian.

In: Surface Science, Vol. 425, No. 1, 09.04.1999, p. 101-111.

Research output: Contribution to journalArticle

Jin, Q, Rodriguez, JA, Li, CZ, Darici, Y & Tao, N 1999, 'Self-assembly of aromatic thiols on Au(111)', Surface Science, vol. 425, no. 1, pp. 101-111. https://doi.org/10.1016/S0039-6028(99)00195-8
Jin, Q. ; Rodriguez, J. A. ; Li, C. Z. ; Darici, Y. ; Tao, Nongjian. / Self-assembly of aromatic thiols on Au(111). In: Surface Science. 1999 ; Vol. 425, No. 1. pp. 101-111.
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