TY - GEN
T1 - Dielectrophoretic modification of carbon nanotube with ZnO nanoparticles for NO2 gas sensing
AU - Inoue, Shota
AU - Nanba, Yushi
AU - Nakano, Michihiko
AU - Suehiro, Junya
PY - 2017/2/8
Y1 - 2017/2/8
N2 - We developed dielectrophoresis (DEP)-based fabrication method of a carbon nanotube (CNT) NO2 gas sensor that integrates CNT on a microelectrode. The dielectrophoretic integration method can also be used to deposit nanoparticles on CNT surface. This study demonstrates that the modification of the CNT with zinc oxide nanoparticles (ZnO NPs) by dielectrophoresis This sensor were tested by measuring resistance change of the sensor against 1ppm concentration of NO2 at room temperature. The resistance of 0.025 mg/ml and 1.25 mg/ml ZnO NPs-decorated CNT gas sensor rapidly increased followed by slow decreased. This rapid resistance change was saturated by deposition of 25 mg/ml ZnO NPs, and behaved similar to ZnO NW gas sensor. The resistance decrease can be considered as CNT response. The rapid resistance increase cannot be explained by simply summing the responses of the SWCNT sensor and ZnO sensor. The depletion layer of pn-junction due to connection of the CNT and ZnO can be concerned.
AB - We developed dielectrophoresis (DEP)-based fabrication method of a carbon nanotube (CNT) NO2 gas sensor that integrates CNT on a microelectrode. The dielectrophoretic integration method can also be used to deposit nanoparticles on CNT surface. This study demonstrates that the modification of the CNT with zinc oxide nanoparticles (ZnO NPs) by dielectrophoresis This sensor were tested by measuring resistance change of the sensor against 1ppm concentration of NO2 at room temperature. The resistance of 0.025 mg/ml and 1.25 mg/ml ZnO NPs-decorated CNT gas sensor rapidly increased followed by slow decreased. This rapid resistance change was saturated by deposition of 25 mg/ml ZnO NPs, and behaved similar to ZnO NW gas sensor. The resistance decrease can be considered as CNT response. The rapid resistance increase cannot be explained by simply summing the responses of the SWCNT sensor and ZnO sensor. The depletion layer of pn-junction due to connection of the CNT and ZnO can be concerned.
UR - http://www.scopus.com/inward/record.url?scp=85015398402&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85015398402&partnerID=8YFLogxK
U2 - 10.1109/TENCON.2016.7848608
DO - 10.1109/TENCON.2016.7848608
M3 - Conference contribution
AN - SCOPUS:85015398402
T3 - IEEE Region 10 Annual International Conference, Proceedings/TENCON
SP - 3054
EP - 3057
BT - Proceedings of the 2016 IEEE Region 10 Conference, TENCON 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE Region 10 Conference, TENCON 2016
Y2 - 22 November 2016 through 25 November 2016
ER -