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Structures and Displacement of 1-adamantanethiol Self-Assembled Monolayers on Au{111}

Structures and Displacement of 1-adamantanethiol Self-Assembled Monolayers on Au{111}

Arrelaine A Dameron, Lyndon F Charles, Paul S Weiss

J Am Chem Soc. 2005 Jun 22;127(24):8697-704.

PMID: 15954775

Abstract:

We have designed monolayers with weak intermolecular interactions for use as placeholders in intelligent self- and directed-assembly. We have shown that these 1-adamantanethiolate monolayers are labile with respect to displacement by exposing them to dilute solutions of alkanethiols. These self-assembled monolayers (SAMs) of 1-adamantanethiol on Au{111} were probed using ambient scanning tunneling microscopy (STM), and their assembled order was determined. Solution deposition of the molecules results in a highly ordered hexagonally close-packed molecular lattice with a measured nearest neighbor distance of 6.9 +/- 0.4 A. The SAMs exhibit several rotational domains, but lack the protruding domain boundaries typical of alkanethiolate SAMs, and are similarly stable at room temperature. Co-deposition of alkanethiol and 1-adamantanethiol from solution results in alkanethiolate SAMs, except when using extremely low alkanethiol to 1-adamantanethiol concentration ratios. Facile displacement of low interaction strength SAMs can be exploited to enhance patterning using soft nanolithography.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP34301547	1-Adamantanethiol		34301-54-7	Price

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