Applying AFM-based nanofabrication for measuring the thickness of nanopatterns: the role of head groups in the vertical self-assembly of omega-functionalized n-alkanethiols

Langmuir : the ACS Journal of Surfaces and Colloids
Algernon T KelleyJayne C Garno

Abstract

Molecules of n-alkanethiols with methyl head groups typically form well-ordered monolayers during solution self-assembly for a wide range of experimental conditions. However, we have consistently observed that, for either carboxylic acid or thiol-terminated n-alkanethiols, under certain conditions nanografted patterns are generated with a thickness corresponding precisely to a double layer. To investigate the role of head groups for solution self-assembly, designed patterns of omega-functionalized n-alkanethiols were nanografted with systematic changes in concentration. Nanografting is an in situ approach for writing patterns of thiolated molecules on gold surfaces by scanning with an AFM tip under high force, accomplished in dilute solutions of desired ink molecules. As the tip is scanned across the surface of a self-assembled monolayer under force, the matrix molecules are displaced from the surface and are immediately replaced with fresh molecules from solution to generate nanopatterns. In this report, side-by-side comparison of nanografted patterns is achieved for different matrix molecules using AFM images. The chain length and head groups (i.e., carboxyl, hydroxyl, methyl, thiol) were varied for the nanopatterns and matri...Continue Reading

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Citations

Jan 16, 2014·Journal of the American Chemical Society·Jong-Won Park, Jennifer S Shumaker-Parry
Aug 27, 2014·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xianglin ZhaiJayne C Garno
Nov 8, 2014·Scanning·Chad I DrexlerThomas J Mullen
Oct 18, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Lilach TamamMoshe Deutsch
Jun 5, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Chad I DrexlerThomas J Mullen
Sep 23, 2014·Journal of the American Chemical Society·Susan D Verberne-SuttonJustin R Ragains
Oct 20, 2017·Beilstein Journal of Nanotechnology·Rashanique D QuarelsJustin R Ragains

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