Development of smartphone hyphenated colorimetric, plasmonic and electrochemical biosensors for food contaminant detection

In chapter 4-7 experimental research is conducted which aims to contribute to further developing the most interesting technology identified in the previous chapters. In chapter four an immunoassay based on plasmonic coupling of nanoparticles for the detection of domoic acid was conducted. In chapter five and six the potential of smartphone based image analyses of colorimetric assays was thoroughly assessed.

In chapter seven an electrochemical immunoassay was developed for domoic acid detection in shellfish. Here the focus was on the performance of screen printed electrodes that were modified with various materials. Finally, in chapter eight, a synopsis of the thesis is given.

The work reported in this thesis critically analysed the potential of smartphones for point-of-site sensing and contributes to the development of this intriguing field.