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• Itoh, T
• Matsubara, I
• Kadosaki, M
• Sakai, Y
• Shin, W
• Izu, N
• Nishibori, M
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• Matsubara, I
• Kadosaki, M
• Sakai, Y
• Shin, W
• Izu, N
• Nishibori, M
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• Matsubara, I
• Kadosaki, M
• Sakai, Y
• Shin, W
• Izu, N
• Nishibori, M

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Sensors 2010, 10(7), 6513-6521; doi:10.3390/s100706513

Article

Effects of High-Humidity Aging on Platinum, Palladium, and Gold Loaded Tin Oxide—Volatile Organic Compound Sensors

Toshio Itoh^1,* , Ichiro Matsubara¹ , Masahiro Kadosaki² , Yuichi Sakai² , Woosuck Shin¹ , Noriya Izu¹  and Maiko Nishibori¹

¹ National Institute of Advanced Industrial Science and Technology (AIST), Shimo-Shidami, Moriyama-ku, Nagoya 463-8560, Japan ² Toyama Industrial Technology Center, 383 Takada, Toyama 930-0866, Japan

* Author to whom correspondence should be addressed.

Received: 29 May 2010; in revised form: 15 June 2010 / Accepted: 25 June 2010 / Published: 6 July 2010

(This article belongs to the Section Chemical Sensors)

Download PDF Full-Text [314 KB, uploaded 6 July 2010 09:58 CEST]

Abstract: This study is an investigation of high-humidity aging effects on the total volatile organic compound (T–VOC) gas-sensing properties of platinum, palladium, and gold-loaded tin oxide (Pt,Pd,Au/SnO₂) thick films. The sensor responses of the high-humidity aged Pt,Pd,Au/SnO₂, a non-aged Pt,Pd,Au/SnO₂, and a high-humidity aged Pt/SnO₂ to T–VOC test gas have been measured. The high-humidity aging is an effective treatment for resistance to humidity change for the Pt,Pd,Au/SnO₂ but not effective for the Pt/SnO₂. The mechanism of the high-humidity aging effects is discussed based on the change of surface state of the SnO₂ particles.

Keywords: gas sensor; tin oxide; noble metal loaded tin oxide; T–VOC test gas; high-humidity aging

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