Accession Number:

ADA279910

Title:

Scanning Tunneling Microscopy Studies of Self-Assembled Monolayers of Alkanethiols on Gold

Descriptive Note:

Technical rept.

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY

Personal Author(s):

• Stranick, S. J.
• Kamna, M. M.
• Krom, K. R.
• Parikh, A. N.
• Allara, D. L.

Report Date:

1994-04-05

Pagination or Media Count:

16.0

Abstract:

We have used scanning tunneling microscopy to probe the molecular scale structures of pure and mixed composition self-assembled monolayers of CH3CH215SH and CH302CCH215SH on gold. A predominant defect structure is found for both films and is assigned as a void defect in the thiolate overlayer. The mixed composition films are observed to phase segregate into domains of the pure component thiolates. Time-lapse series of scanning tunneling microscope images reveal kink-driven motion at step edges and exchange of thiolate molecules on terraces.

Descriptors:

• *SCANNING
• *ALKANES
• *TUNNELING
• *MICROSCOPY
• *GOLD
• *THIOLS
• PROBES
• LAYERS
• MOLECULES
• MICROSCOPES
• DEFECT ANALYSIS
• EXCHANGE
• IMAGES
• MOLECULAR STRUCTURE
• SCALE
• FILMS
• MOTION
• VOIDS
• PHASE

Subject Categories:

• Inorganic Chemistry
• Organic Chemistry
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE