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Sensors, Volume 4, Issue 10 (October 2004) – 2 articles , Pages 156-169

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303 KiB  
Article
Fabrication of Thin-Film LAPS with Amorphous Silicon
by Tatsuo Yoshinobu, Michael J. Schöning, Friedhelm Finger, Werner Moritz and Hiroshi Iwasaki
Sensors 2004, 4(10), 163-169; https://doi.org/10.3390/s41000163 - 30 Oct 2004
Cited by 30 | Viewed by 8381
Abstract
To improve the spatial resolution of the light-addressable potentiometric sensor (LAPS), it is necessary to reduce the thickness of the semiconductor layer, which, however, causes a problem of the mechanical strength of the sensor plate. In this study, a thin-film LAPS was fabricated [...] Read more.
To improve the spatial resolution of the light-addressable potentiometric sensor (LAPS), it is necessary to reduce the thickness of the semiconductor layer, which, however, causes a problem of the mechanical strength of the sensor plate. In this study, a thin-film LAPS was fabricated with amorphous silicon (a-Si) deposited on a transparent glass substrate. The current-voltage characteristics and pH sensitivity of the fabricated a-Si LAPS were investigated. Full article
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302 KiB  
Article
Inorganic Thin-film Sensor Membranes with PLD-prepared Chalcogenide Glasses: Challenges and Implementation
by Joachim P. Kloock, Youlia G. Mourzina, Yuri Ermolenko, Theodor Doll, Jürgen Schuberth and Michael J. Schöning
Sensors 2004, 4(10), 156-162; https://doi.org/10.3390/s41000156 - 30 Oct 2004
Cited by 27 | Viewed by 9882
Abstract
Chalcogenide glasses offer an excellent “challenge” for their use and implementation in sensor arrays due to their good sensor-specific advantages in comparison to their crystalline counterparts. This paper will give an introduction on the preparation of chalcogenide glasses in the thin-film state. First, [...] Read more.
Chalcogenide glasses offer an excellent “challenge” for their use and implementation in sensor arrays due to their good sensor-specific advantages in comparison to their crystalline counterparts. This paper will give an introduction on the preparation of chalcogenide glasses in the thin-film state. First, single microsensors have been prepared with the methods of semiconductor technology. In a next step, three microsensors are implemented onto one single silicon substrate to an “one chip” sensor array. Different ionselective chalcogenide glass membranes (PbSAgIAs2S3, CdSAgIAs2S3, CuAgAsSeTe and TlAgAsIS) were prepared by means of the pulsed laser deposition (PLD) process. The different sensor membranes and structures have been physically characterized by means of Rutherford backscattering spectrometry, scanning electron microscopy and video microscopy. The electrochemical behavior has been investigated by potentiometric measurements. Full article
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