Phase-mode LAPS and its application to chemical imaging

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
Pages1842-1845
Number of pages4
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems - Denver, CO
Duration: 2009 Jun 212009 Jun 25

Other

OtherTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
CityDenver, CO
Period09/6/2109/6/25

Fingerprint

Potentiometric sensors
Imaging techniques
Photocurrents
Electric potential
Semiconductor materials
Ions
Chemical sensors
Lighting
Electrolytes
Defects

Keywords

  • Chemical imaging sensor
  • Light-addressable potentiometric sensor (LAPS)

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

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

Phase-mode LAPS and its application to chemical imaging. / Miyamoto, K.; Wagner, T.; Yoshinobu, T.; Kanoh, Shinichiro; Schöning, M. J.

TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems. 2009. p. 1842-1845 5285704.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Miyamoto, K, Wagner, T, Yoshinobu, T, Kanoh, S & Schöning, MJ 2009, Phase-mode LAPS and its application to chemical imaging. in TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems., 5285704, pp. 1842-1845, TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems, Denver, CO, 09/6/21. https://doi.org/10.1109/SENSOR.2009.5285704
Miyamoto K, Wagner T, Yoshinobu T, Kanoh S, Schöning MJ. Phase-mode LAPS and its application to chemical imaging. In TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems. 2009. p. 1842-1845. 5285704 https://doi.org/10.1109/SENSOR.2009.5285704
Miyamoto, K. ; Wagner, T. ; Yoshinobu, T. ; Kanoh, Shinichiro ; Schöning, M. J. / Phase-mode LAPS and its application to chemical imaging. TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems. 2009. pp. 1842-1845
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