TY - GEN
T1 - Nanomaterial sensing layer based surface acoustic wave hydrogen sensors
AU - Srinivasan, Krishnan
AU - Cular, Stefan
AU - Bhethanabotla, Venkat R.
AU - Lee, Sang Yup
AU - Harris, Michael T.
PY - 2005
Y1 - 2005
N2 - Pd-cluster coated, engineered tobacco mosaic virus (TMV) and similarly coated single-walled carbon nanotube (SWNT) particles have been studied for hydrogen detection with the help of surface acoustic wave (SAW) resonators. SAW resonators were coated with these two different nano-structured sensing layers (Pd-TMV and Pd-SWNT) which produced differently useful hydrogen sensor responses. The Pd-TMV coated resonator responded to hydrogen with nearly constant increases in frequency as compared to the Pd-SWNT coated device, which responded with concentration-dependent decreases in frequency of greater magnitude upon hydrogen exposure. The former behavior is more associated with acousto-electric phenomena in SAW devices and the later with mass loading. The 99% response times were 30-40 seconds for the Pd-TMV sensing layer and approximately 150 seconds for the Pd-SWNT layer. Both the films showed high robustness and reversibility at room temperature.
AB - Pd-cluster coated, engineered tobacco mosaic virus (TMV) and similarly coated single-walled carbon nanotube (SWNT) particles have been studied for hydrogen detection with the help of surface acoustic wave (SAW) resonators. SAW resonators were coated with these two different nano-structured sensing layers (Pd-TMV and Pd-SWNT) which produced differently useful hydrogen sensor responses. The Pd-TMV coated resonator responded to hydrogen with nearly constant increases in frequency as compared to the Pd-SWNT coated device, which responded with concentration-dependent decreases in frequency of greater magnitude upon hydrogen exposure. The former behavior is more associated with acousto-electric phenomena in SAW devices and the later with mass loading. The 99% response times were 30-40 seconds for the Pd-TMV sensing layer and approximately 150 seconds for the Pd-SWNT layer. Both the films showed high robustness and reversibility at room temperature.
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U2 - 10.1109/ULTSYM.2005.1602935
DO - 10.1109/ULTSYM.2005.1602935
M3 - Conference contribution
AN - SCOPUS:33847091236
SN - 0780393821
SN - 9780780393820
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 645
EP - 648
BT - 2005 IEEE Ultrasonics Symposium
T2 - 2005 IEEE Ultrasonics Symposium
Y2 - 18 September 2005 through 21 September 2005
ER -