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Item Open Access Gate bias characterization of CNT-TFT DNA sensors(IEEE, 2009-12) Aktaş, Özgür; Töral, TaylanThis paper follows the approach in the works of Gui et al. (2007), that use the change in the current of carbon nanotube thin film transistors (CNT-TFT) with DNA attachment and DNA hybridization. The authors have studied the response of CNT-TFTs to DNA binding and hybridization. It was demonstrated for the first time that an increase in sensitivity is observed around the threshold voltage when sweeping the gate bias from negative to positive values. The results presented in this work suggest an improved approach to measuring the response of CNT-TFTs to DNA hybridization.Item Open Access Operation of carbon nanotube thin-film transistors at elevated temperatures(IEEE, 2009-12) Öztürk, Sadi; Doğan, Mustafa; Aktaş, ÖzgürThe authors study the operation of carbon nanotube thin-film transistors (CNT-TFT) at elevated temperatures. Due to the small bandgap of semiconducting carbon nanotubes, CNT-TFTs are not suitable to be developed as high-temperature devices. However, CNT-TFTs will still have to endure elevated temperatures when employed in large-area and flexible electronic applications. The temperature range that can be expected in these applications is well below 100°C. In this work, the authors demonstrate that even at 100°C, CNT-TFT devices are operational but with a reduced ON/OFF ratio. Beyond 100°C, the ON/OFF ratio degrades rapidly.