New monolayer phases of [ital n]-alkane thiols self-assembled on Au(111): Preparation, surface characterization, and imaging
- Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544 (United States)
- National Institute of Standards and Technology, Process Measurements Division, Gaithersburg, Maryland 20899 (United States)
We report the observation by scanning tunneling microscopy (STM) and low energy atom diffraction, of new, striped, structures at the surface of monolayers of [ital n]-alkane thiols [CH[sub 3] (CH[sub 2])[sub [ital n][minus]1] SH with [ital n]=8,10,12] self-assembled on the (111) face of single crystal gold. These structures can be prepared by slow (room temperature) or thermally accelerated treatment of the well known [ital c](4[radical]3[times]2[radical]3)R 30[degree] phase formed by self-assembly in solution, or can be accessed directly by molecular beam deposition. With respect to the unit mesh of the gold substrate, the new striped structures can be described as [ital p][times][radical]3 overlayers where 7.5[le][ital p][le]13. The discovery of these phases has implications for the understanding of the growth mechanisms and the pursuit of applications of this widely studied class of materials.
- DOE Contract Number:
- FG02-93ER45503
- OSTI ID:
- 6836451
- Journal Information:
- Journal of Chemical Physics; (United States), Vol. 101:12; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALKANES
CRYSTAL STRUCTURE
THIOLS
ATOMIC BEAM DIFFRACTION
CRYSTAL GROWTH
DEPOSITION
ENERGY DEPENDENCE
GOLD
MOLECULES
PHASE STUDIES
SCANNING ELECTRON MICROSCOPY
SOLUTIONS
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
TUNNEL EFFECT
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
ELEMENTS
HYDROCARBONS
METALS
MICROSCOPY
MIXTURES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SCATTERING
TEMPERATURE RANGE
TRANSITION ELEMENTS
360602* - Other Materials- Structure & Phase Studies