Details

Autor(en) / Beteiligte

• Chikkadi, K.
• Muoth, M.
• Hierold, C.

Titel

Hysteresis-free, suspended pristine carbon nanotube gas sensors

Ist Teil von

• 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013, p.1637-1640

Ort / Verlag

IEEE

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present a novel carbon nanotube gas sensor based on a suspended and ultraclean carbon nanotube transistor. The transistor shows no apparent hysteresis under ambient conditions, thus reducing the drift of the sensor signal due to charging effects. Structural characterization with TEM shows the presence of one single-walled nanotube in the transistor channel. Exposure to 1 ppm NO 2 is shown to result in a drain current change of 115%. Together with noise measurements, a detection limit of 32 ppb NO 2 is extrapolated. The dependence of signal-to-noise ratio and the low-frequency noise on gate voltage are analyzed.