Professor Paul Dastoor is Professor of Physics at the University of Newcastle in Australia. He received his B.A. degree in Natural Sciences and his PhD in Surface Physics from the University of Cambridge. He has been Visiting Research Fellow at Fitzwilliam College, Cambridge, UK, at the Daresbury Laboratory, Cheshire, UK and at Nanyang Technological University. He is Director of the Centre for Organic Electronics, which he established in 2007. His research interests encompass the growth and properties of thin films, surface coatings and organic electronic devices based on semi-conducting polymers. These exciting materials offer the tantalising prospect of paints that generate electricity directly from sunlight and sensors that can be printed as flexible arrays.
|Printable organic thin film transistors for glucose detection|
|Background: The effect of device architecture upon the response of printable enzymatic glucose sensors based on poly(3-hexythiophene) (P3HT) organic thin film transistors is presented.
Methodology: The change in drain current is used as the basis for glucose detection and we show that significant improvements in drain current response time can be achieved by modifying the design of the sensor structure.
Results: The results are in good agreement with a diffusion based model of device operation, where an initial rapid dedoping process is followed by a slower doping of the P3HT layer from protons that are enzymatically generated by glucose oxidase (GOX) at the Nafion gate electrode. The fitted diffusion data is consistent with a P3HT doping region that is close to the source-drain electrodes rather than located at the P3HT:[Nafion:GOX] interface
Conclusion: Inkjet-printing offers a pathway to low-cost printed biosensors for the detection of glucose in saliva.