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Reference type: Conference Proceeding
Authors: Dickert FL, Greibl W, Sikorski R, Tortschanoff M, Weber K, Bulst WE, Fischerauer G
Publication date: 1998
Article title: Chemical microsensors with molecularly imprinted sensitive layers.
Page numbers: 114-122
DOI: 10.1117/12.333738

Proceedings title: Chemical Microsensors and Applications
Editors: Buettgenbach S
Publisher: The International Society for Optical Engineering
Volume number: 3539

Abstract: The bottleneck in the development of chemical sensors is the design of the coatings for chemical recognition of the analyte; One pronounced method is to tailor supramolecular cavities for different analytes. Polyfunctional linkers or the embedding of these materials in a polymeric matrix can improve stability and response time of the sensor. An even more favorable method to synthesize chemically sensitive layers is realized by molecular imprinting, since a rigid polymer can be generated directly on the transducer of interest and may be included in its production process. The analyte of interest acts as a template during the polymerization process and is evaporated or extracted by suitable solvents. Due to the cavities formed this polymer enriches analyte molecules, which can be detected by mass-sensitive devices such as QMB or SAW resonators or by optical measurements. This procedure allows both the detection of polycyclic aromatic hydrocarbons (PAHs) with fluorescence or mass sensitive devices. If the print PAHs are varied the polymers are tuned to the desired analyte. The enrichment of solvent vapors or other uncolored specimen by the layer can also be followed by the embedding of carbenium ions used as optical labels

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