Title :
Microwave vertically aligned carbon nanotube array sensors for ammonia detection
Author :
McGrath, Mark P. ; Pham, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA
fDate :
Oct. 30 2005-Nov. 3 2005
Abstract :
We present the results of the first reported microwave nanotube sensor with vertically aligned multiwalled nanotube arrays as the sensing material. The sensitivity is found to be -2.5 KHz/ppm for ammonia concentrations less than 1000 ppm. The frequency shift of the nanotube array resonator is in the opposite direction of that of previous experiments using randomly aligned nanotubes, and this difference is discussed
Keywords :
ammonia; carbon nanotubes; gas sensors; resonators; ammonia detection; microwave nanotube sensors; multiwalled nanotube arrays; nanotube array resonator; Carbon nanotubes; Chemical sensors; Gas detectors; Microwave antenna arrays; Microwave sensors; Permittivity; Resonant frequency; Sensor arrays; Temperature sensors; Wireless sensor networks;
Conference_Titel :
Sensors, 2005 IEEE
Conference_Location :
Irvine, CA
Print_ISBN :
0-7803-9056-3
DOI :
10.1109/ICSENS.2005.1597830
