Engineering the band gap of carbon nanotube for infrared sensors

King Wai Chiu Lai; Ning Xi; Carmen Kar Man Fung; Hongzhi Chen; Tzyh-Jong Tarn
November 2009
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p221107
Academic Journal
Carbon nanotube (CNT) has been found to be one of the promising semiconducting materials for nanoelectronic sensors due to its unique electrical properties. Our group has developed a spectrum sensor using a single CNT and demonstrated its performance. In this paper, a steady and high-yield CNT band gap engineering will be developed and used to manufacture an appropriate CNT for infrared (IR) detection. The fabrication and experimental result of the CNT-based spectrum sensor will be presented. The results indicate that the CNT-based spectrum sensor is capable to sense near IR and middle-wave IR signals at room temperature.


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