Issue 10, 2000
From the journal:

Journal of the Chemical Society, Perkin Transactions 2

Cation sensing by patterned self-assembled monolayers on gold

Simon Flink,a   Holger Schönherr,b   G. Julius Vancso,b   Frank A. J. Geurts,a   Kees G. C. van Leerdam,c   Frank C. J. M. van Veggel*a  and  David N. Reinhoudt*a  

* Corresponding authors

a Department of Supramolecular Chemistry and Technology, MESA+ Research Institute, University of Twente, PO Box 217, Enschede, The Netherlands
E-mail: SMCT@ct.utwente.nl
Fax: +3153 489465
Tel: +31 53 4892980

b Materials Science and Technology of Polymers, MESA+ Research Institute, University of Twente, PO Box 217, Enschede, The Netherlands

c Analytical and Environmental Chemistry Department, Akzo Nobel Central Research, PO Box 9300, Arnhem, The Netherlands

Abstract

X-Ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) have been used to study the interactions between self-assembled monolayers (SAMs) of crown ether adsorbates and metal ions. Both analytical techniques confirmed the selectivities of the 12-crown-4 and 15-crown-5 SAMs that had previously been determined by electrochemical impedance spectroscopy. AFM has also been used to characterize microcontact-printed crown ether monolayers. The electrochemical patterning of monolayers on gold allowed the design of a dual sensor for the electrochemical detection of cations. However, due to cross-contamination of both monolayers during the patterning process a significant selectivity reduction of the layers was observed. Nevertheless, the remaining Na+ selectivity of the 12-crown-4 SAM and the K+ selectivity of the 15-crown-5 SAM allowed the unambiguous discrimination between both metal ions.

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Article information

DOI
https://doi.org/10.1039/B002606I
Article type
Paper
Submitted
03 Apr 2000
Accepted
17 Jul 2000
First published
19 Sep 2000

J. Chem. Soc., Perkin Trans. 2, 2000, 2141-2146

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Cation sensing by patterned self-assembled monolayers on gold

S. Flink, H. Schönherr, G. J. Vancso, F. A. J. Geurts, K. G. C. van Leerdam, F. C. J. M. van Veggel and D. N. Reinhoudt, J. Chem. Soc., Perkin Trans. 2, 2000, 2141 DOI: 10.1039/B002606I

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