IEEJ Transactions on Sensors and Micromachines
Online ISSN : 1347-5525
Print ISSN : 1341-8939
ISSN-L : 1341-8939
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Volume 127, Issue 8
Displaying 1-4 of 4 articles from this issue
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Special Issue on “Silicon Chemical Sensors”
Special Issue Paper
  • Automation of pH Measurement Using a Flow-Through Type Differential pH Sensor System Based on pH-FET
    Satoshi Mohri, Michihiro Nakamura, Keiji Naruse
    2007 Volume 127 Issue 8 Pages 367-370
    Published: August 01, 2007
    Released on J-STAGE: September 01, 2007
    DOIhttps://doi.org/10.1541/ieejsmas.127.367
    JOURNAL FREE ACCESS
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    Automatic pH measurement system was developed by using a flow-through type differential pH-FET sensor. The system was operated by repeating 60 sec cycle consisting of 36 sec of washing period, 4 sec of moving period, and 20 sec of measuring period. In washing period, the differential pH-FET sensor was washed with baseline solution. In measuring period, about 50 μl of sample solution was withdrawn to the space around a measurement pH-FET, and the change of differential source potential was measured. Absolute values of error for nine sample solutions with weak buffering ability were less than 0.146 pH, and were 0.071 pH in average. From this experiment, it was suggested that high-speed and automated pH measurement will be possible by using pH-FET sensors even for sample solutions of weak buffer ability.
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Paper
  • Optimized Design of Plastic Package for InSb Thin-Film Magneto-Resistance Devices for Gear-Tooth Rotation Detection
    Atsushi Okamoto, Kazuhiro Nishimura, Hiromasa Goto, Kazuo Yoshida, Ich ...
    2007 Volume 127 Issue 8 Pages 371-375
    Published: August 01, 2007
    Released on J-STAGE: September 01, 2007
    DOIhttps://doi.org/10.1541/ieejsmas.127.371
    JOURNAL FREE ACCESS
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    This paper discusses the optimized design of the plastic package of Sn-doped InSb thin film magneto-resistance (MR) devices for gear tooth rotation detection. The newly developed package of magneto-resistance elements helps to simplify the assembly of gear-tooth rotation detectors. The properties for detecting rotation and the electrical and operational properties of the new package MR detectors were studied, including the upper limit of operation temperature.
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  • Multi-Channel Taste Sensor with LB Films
    Tsuyoshi Arata, Takamichi Hirata, Masashiro Akiya
    2007 Volume 127 Issue 8 Pages 376-381
    Published: August 01, 2007
    Released on J-STAGE: September 01, 2007
    DOIhttps://doi.org/10.1541/ieejsmas.127.376
    JOURNAL FREE ACCESS
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    In this paper, sensor responses using film materials such as stearic acid were described. In addition, the difference of sensor response from some kind of film materials was compared. Film material of stearic acid was used other than dioctadecyldimethylammonium bromide and trioctadecylamine hydrochloride. Evaporated electrode of Au and Ag were used for stearic acid. To detect five basic taste substances, sensor parameters were defined as maximum voltage change and response time. These eight parameters obtained from four sensors were applied to principle component analysis. Five basic tastes were divided into each quadrant. Finally, five basic taste substances were clearly discriminated.
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  • Study for Identification of Mixed Taste Materials by the Taste Sensor with LB Film
    Ryouhei Kikuchi, Takamichi Hirata, Masahiro Akiya
    2007 Volume 127 Issue 8 Pages 382-386
    Published: August 01, 2007
    Released on J-STAGE: September 01, 2007
    DOIhttps://doi.org/10.1541/ieejsmas.127.382
    JOURNAL FREE ACCESS
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    In this paper, sensor response by LB film material was described. LB film material was the Dioctadecyldimethylammonium bromide and the Au electrode was evaporated. To detect five typical taste substances,sensor parameters were defined by conventional maximum voltage change and new parameter as stability voltage change against response time. The taste sensor measured single solutions and mainly mixed solutions of five typical taste substances. Using these parameters mixed solutions of five typical substances were clearly discriminated.
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