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Characterization of a Self-Assembled Monolayer Based on a Calix[4]Crown-5 Derivate: Fabrication of a Chemical Sensor Sensitive to Calcium

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Abstract:

The synthesis and self-assembled monolayer (SAM) formation of a calix[4]crown-5 derivative are reported. Several techniques, including electrochemistry, atomic force microscopy (AFM), Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and contact angle measurements have been applied to characterise the monolayer film designed for chemical sensor applications. The recognition properties of this SAM for metal cations has been investigated using impedance spectroscopy (IS) showing an electrochemical response proportional to calcium ion concentration in the range from 10−7 M to 10−2 M. This response is related to microscopic changes at the gold surface induced by selective binding by the immobilised calixarene.

Keywords: ATOMIC FORCE MICROSCOPY; CALIXARENES; IMPEDANCE SPECTROSCOPY; MICRO-CONTACT PRINTING; SELF ASSEMBLED MONOLAYER

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.1733

Publication date: January 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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