Phase-mode LAPS and its application to chemical imaging

K. Miyamoto, T. Wagner, T. Yoshinobu, S. Kanoh, M. J. Schöning

研究成果: Conference contribution

2 引用 (Scopus)

抜粋

The light-addressable potentiometric sensor (LAPS) is a chemical sensor based on the field effect in the electrolyte - insulator - semiconductor (EIS) structure. In the conventional LAPS, the ion concentration in the analyte solution is determined by measuring the amplitude of the photocurrent induced by illumination of a modulated light. In this study, we developed the phase-mode LAPS, in which the phase of the alternating photocurrent is measured instead of its amplitude. The phase - voltage curve shifted along the voltage axis in response to the variation of ion concentration, in analogy to the shift of the current - voltage curve in the conventional LAPS. The primary advantage of the phase-mode LAPS is that it is much less sensitive to the fluctuation of the light intensity. It is also demonstrated that chemical imaging based on the phase-mode LAPS is almost free from artifacts related to defects in the semiconductor substrate.

元の言語English
ホスト出版物のタイトルTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
ページ1842-1845
ページ数4
DOI
出版物ステータスPublished - 2009 12 11
イベントTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems - Denver, CO, United States
継続期間: 2009 6 212009 6 25

出版物シリーズ

名前TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems

Conference

ConferenceTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
United States
Denver, CO
期間09/6/2109/6/25

    フィンガープリント

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

これを引用

Miyamoto, K., Wagner, T., Yoshinobu, T., Kanoh, S., & Schöning, M. J. (2009). Phase-mode LAPS and its application to chemical imaging. : TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems (pp. 1842-1845). [5285704] (TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems). https://doi.org/10.1109/SENSOR.2009.5285704