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 journalConference articlepeer-review

4 Citations (Scopus)


We herein propose and demonstrate the constant-phase-mode operation of the light-addressable potentiometric sensor (LAPS). The bias voltage applied to the LAPS sensor plate is servo-controlled to maintain the phase of the photocurrent with respect to the light modulation at a constant value. In this new operation mode, the temporal change and the spatial distribution of the potential at the sensing surface can be recorded and converted into the analyte concentration. This LAPS with a constant-phasemode is advantageous due to its wider measurement range and reduction of artifacts.

Original languageEnglish
Pages (from-to)1487-1490
Number of pages4
JournalProcedia Chemistry
Issue number1
Publication statusPublished - 2009 Sept
Externally publishedYes
EventEurosensors 23rd Conference - Lausanne, Switzerland
Duration: 2009 Sept 62009 Sept 9


  • LAPS
  • chemical imaging sensor
  • light-addressable potentiometric sensor

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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