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CARBON NANOTUBE THIN FILM TRANSISTORS FOR BIOMEDICAL APPLICATIONS Vanessa Velasco August 5, 2010 The application of carbon nanotubes (CNTs) has captivated the curiosity of today's experts due to the escalating potential in the field of electronic detection of biomolecules. Their extreme environmental sensitivity and small size make them ideal candidates for future biosensing technologies. Recent studies have shown that the binding of receptor proteins (biomolecules located at the membrane of cells) with their corresponding antibodies immobilized on a carbon nanotube surface causes changes in the electrical properties of carbon nanotubes and have been measured with a carbon nanotube field effect transistor (CNTFET). This specific molecular interaction and sensitivity is promising for the direct detection of live cells in blood. In this study, a biosensor was developed based on carbon nanotube thin film transistors for the purpose of electrically detecting breast cancer cells (MCF-7) in blood. The electrical response of specific and non-specific interactions between anchored antibodies onto the carbon nanotube film surface and breast cancer cells mixed with

Carbon nanotube thin film transistors for biomedical applications.