The fabrication of high sensitivity gold nanorod H2S gas sensors utilizing the highly uniform anodic aluminum oxide template
Chien-Yu Li,
Ciao-Yu Li,
You-Lin Wu,
Chung-Ping Hsu,
Ming-Ching Lee,
Mau-Phon Houng
Affiliations
Chien-Yu Li
Institute of Microelectronics Department of Electrical Engineering, National Cheng Kung University, No. 1, University Rd., Tainan City 701, Taiwan
Ciao-Yu Li
Institute of Microelectronics Department of Electrical Engineering, National Cheng Kung University, No. 1, University Rd., Tainan City 701, Taiwan
You-Lin Wu
Department of Electrical Engineering, National Chi Nan University, 1 University Rd., Puli, Nantou 54561, Taiwan
Chung-Ping Hsu
Division of Thoracic Surgery, Department of Surgery, Taichung Veterans General Hospital, No. 1650, Taiwan Boulevard Section 4, Taichung City 40705, Taiwan
Ming-Ching Lee
Division of Thoracic Surgery, Department of Surgery, Taichung Veterans General Hospital, No. 1650, Taiwan Boulevard Section 4, Taichung City 40705, Taiwan
Mau-Phon Houng
Institute of Microelectronics Department of Electrical Engineering, National Cheng Kung University, No. 1, University Rd., Tainan City 701, Taiwan
Gold nanorod were fabricated using anodic alumina oxide template for H2S gas detection. The nanorod gas sensor exhibits high surface density and contact area, which can increase detection sensitivity. The anodic alumina oxide template contains an array of pores, with a width of 70 nm and a length of 27μm. Au nanorod were obtained through electro-deposition under a pulse bias of −1 V. The resistance of the Au nanorod was recorded upon exposure to various concentrations of H2S. The resistance could be attributed to the high electron affinity between sulfide and Au nanorod. Au–sulfide bonds provide strong bonding, which could alter the conductivity of the sensor. The gas sensor exhibits high sensitivity and short response time for H2S detection at room temperature.
