| Title: | Pulse-driven micro gas sensor fitted with clustered Pd/SnO2 nanoparticles |
| Author(s): | Suematsu K; Shin Y; Ma N; Oyama T; Sasaki M; Yuasa M; Kida T; Shimanoe K; |
| Address: | "daggerDepartment of Energy and Material Sciences, Faculty of Engineering Science, Kyushu University, Kasuga, Fukuoka 816-8580, Japan. double daggerDepartment of Molecular and Material Science, Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka 816-8580, Japan. section signDepartment of Applied Chemistry and Biochemistry, Kumamoto University, Kumamoto 860-8555, Japan" |
| DOI: | 10.1021/acs.analchem.5b01767 |
| ISSN/ISBN: | 1520-6882 (Electronic) 0003-2700 (Linking) |
| Abstract: | "Real-time monitoring of specific gas concentrations with a compact and portable gas sensing device is required to sense potential health risk and danger from toxic gases. For such purposes, we developed an ultrasmall gas sensor device, where a micro sensing film was deposited on a micro heater integrated with electrodes fabricated by the microelectromechanical system (MEMS) technology. The developed device was operated in a pulse-heating mode to significantly reduce the heater power consumption and make the device battery-driven and portable. Using clustered Pd/SnO2 nanoparticles, we succeeded in introducing mesopores ranging from 10 to 30 nm in the micro gas sensing film (area: varphi 150 mum) to detect large volatile organic compounds (VOCs). The micro sensor showed quick, stable, and high sensor responses to toluene at ppm (parts per million) concentrations at 300 degrees C even by operating the micro heater in a pulse-heating mode where switch-on and -off cycles were repeated at one-second intervals. The high performance of the micro sensor should result from the creation of efficient diffusion paths decorated with Pd sensitizers by using the clustered Pd/SnO2 nanoparticles. Hence we demonstrate that our pulse-driven micro sensor using nanostructured oxide materials holds promise as a battery-operable, portable gas sensing device" |
| Keywords: | Electrochemical Techniques/instrumentation/*methods Electrodes Gases/*analysis Lead/*chemistry Metal Nanoparticles/*chemistry/ultrastructure Micro-Electrical-Mechanical Systems Porosity Tin Compounds/*chemistry Toluene/analysis Volatile Organic Compounds/; |
| Notes: | "MedlineSuematsu, Koichi Shin, Yuka Ma, Nan Oyama, Tokiharu Sasaki, Miyuki Yuasa, Masayoshi Kida, Tetsuya Shimanoe, Kengo eng Research Support, Non-U.S. Gov't 2015/07/22 Anal Chem. 2015 Aug 18; 87(16):8407-15. doi: 10.1021/acs.analchem.5b01767. Epub 2015 Aug 4" |
