Results and Discussion: Biorecognition Processes on Different CNT Platforms
The structural requirements of the carbon nanotubes for a better electrochemical performance have been analysed by considering CNT composites. Results have shown that a disposition with high density of edges is important for fast electron transfer. Therefore, the proper construction and orientation of the CNT electrodes will become very important. Consequently, a shift towards different concepts of electrode platforms can be an interesting strategy to follow. Promising alternatives can be the design and development of high density of vertically aligned carbon nanotubes (VACNT) or CNT-forest electrodes, vertically aligned carbon nanotubes microelectrodes (CNT microelectrodes) and ultramicroelectrodes (UMAs). Therefore, in this section we will start evaluating the electrochemical performance of different upright oriented CNT electrodes but also as supports for functionalization and biosensing. Specifically, different iron protein, DNA and aptamer-based sensors will be evaluated. All these studies have been pursued with the final goal of achieving an improvement of sensitivity and selectivity in the biorecognition process.
KeywordsCharge Transfer Resistance Hybridization Process Electron Transfer Rate Constant Ruthenium Species Peak Potential Difference
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