Constant-phase-mode operation of the light-addressable potentiometric sensor

Ko Ichiro Miyamoto, Torsten Wagner, Shuhei Mimura, Shin'Ichiro Kanoh, Tatsuo Yoshinobu, Michael J. Schöning

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The constant-phase-mode operation of the light-addressable potentiometric sensor (LAPS) is proposed and demonstrated. In this new operation mode, the temporal change and the spatial distribution of the analyte concentration are recorded in the form of the bias voltage applied to the LAPS sensor plate, which is servo-controlled to maintain the phase of the photocurrent at a constant value with respect to the light modulation. The constant-phase-mode LAPS is advantageous for its wider measurement range and reduction of artifacts.

Original languageEnglish
Pages (from-to)119-123
Number of pages5
JournalSensors and Actuators, B: Chemical
Issue number2
Publication statusPublished - 2011 Jun 20
Externally publishedYes


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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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