Structural characterization of microcontact printed arrays of hexa(ethylene glycol)-terminated alkanethiols on gold

Langmuir : the ACS Journal of Surfaces and Colloids
Ye ZhouBo Liedberg

Abstract

This paper reports on the structural characteristics of microcontact printed oligo(ethylene glycol)-terminated alkanethiol layers, HS(CH2)15CONH-(CH2CH2O)6-H (hereafter EG6), on gold. Microwetting, contact angle goniometry, imaging null ellipsometry, and infrared reflection-absorption spectroscopy (IRAS) are used to characterize the printed EG6 layers, and the quality of these layers in terms of layer thickness and the crystallinity of the alkyl and ethylene glycol portions is compared with data obtained from analogous layers prepared by solution self-assembly. The outcome of the printing process is critically dependent on the experimental parameters used to prepare the patterns. It is found that high quality layers, consisting of densely packed all-trans alkyl chains terminated with relatively helical hexa(ethylene glycol) tails, are formed by inking the poly(dimethylsiloxane) (PDMS) stamp with a 1 mM EG6 solution and contacting it with gold for 15 min. The homogeneity of printed layers is not as good as the homogeneity of those prepared from solution under similar conditions, most likely because of simultaneous transfer of low molecular weight residues from the PDMS stamp. These residues, however, can be easily removed upon u...Continue Reading

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Citations

Apr 10, 2014·ACS Applied Materials & Interfaces·Walid Bin Khaled, Dan Sameoto
Dec 25, 2012·Colloids and Surfaces. B, Biointerfaces·Ahu Arslan YildizEva-Kathrin Sinner
Oct 20, 2006·Journal of Colloid and Interface Science·Ye ZhouPer M Claesson
Jun 9, 2015·Physical Chemistry Chemical Physics : PCCP·Ieva MatulaitienėGediminas Niaura
May 28, 2011·Journal of Colloid and Interface Science·Meng-Jie ChangHao-Li Zhang
Dec 4, 2012·Physical Chemistry Chemical Physics : PCCP·Ilja IgnatjevGediminas Niaura
Mar 11, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Aurimas Kopu StasMarijonas Tutkus
Apr 11, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Li YangMatthew R Linford
Mar 26, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Maria AhrénKajsa Uvdal
May 23, 2020·ACS Applied Materials & Interfaces·Vytautas CėplaRamu Nas Valiokas

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