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Erschienen in:
2014 | OriginalPaper | Buchkapitel
4. Coating and Immobilization of Sensors
verfasst von : Mohd Syaifudin Abdul Rahman, Subhas Chandra Mukhopadhyay, Pak-Lam Yu
Erschienen in: Novel Sensors for Food Inspection: Modelling, Fabrication and Experimentation
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Abstract
The selectivity of the sensors to certain bio-molecules has been discussed in this chapter. This includes testing of different types of coating materials, different coating methods, and immobilization of specific bio-molecules on coated sensors. A new structure, which is different than the conventional interdigital structure, has been adopted for higher sensitivity. The configuration of the electrode structure chosen was 1_5 configuration (five negative electrodes between two positive electrodes) as shown in Fig. 4.1 The analysis of this configuration has been reported in [1]. FR4 sensors were chosen since they were easily fabricated. These sensors were tested with different coating materials. A new type of silicon based interdigital sensor, which has a basic structure of 1_5 configuration, was also fabricated and coated.