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http://dx.doi.org/10.5012/bkcs.2013.34.12.3790

Nanoscale Islands of the Self Assembled Monolayer of Alkanethiol  

Saha, Joyanta K. (Department of Nanomaterials Engineering, Pusan National University)
Yang, Mino (Department of Chemistry, Chungbuk National University)
Jang, Joonkyung (Department of Nanomaterials Engineering, Pusan National University)
Publication Information
Bulletin of the Korean Chemical Society / v.34, no.12, 2013 , pp. 3790-3794 More about this Journal
Abstract
Molecular dynamics simulations were performed to study the structure and stability of a nanoscale self-assembled monolayer (SAM) of alkanethiol on a gold (111) surface. The tilt angle and orientational order of the alkyl chains in the SAM island were examined by systematically varying the size of the island. The chain length dependence of the SAM island was examined by considering alkanethiols containing 12, 16, 20, and 24 carbon atoms. The minimum diameter of SAM islands made from 1-tetracosanethiol, 1-ecosanethiol, 1-hexadecanethiol and 1-dodecanethiol were 2.29, 1.9, 4.7 and 4.76 nm, respectively. These set the ultimate resolution that can be patterned by soft nanolithography. As the length of alkanethiol increases, the SAM islands became more ordered in both orientation and conformation of the alkyl chains.
Keywords
Self-assembled monolayer; Alkanethiol; Chain length; Nanolithography;
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