High speed and high resolution chemical imaging based on a new type of OLED-LAPS set-up

Carl Frederik Benedikt Werner, Torsten Wagner, Ko Ichiro Miyamoto, Tatsuo Yoshinobu, Michael J. Schöning

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Light-addressable potentiometric sensors (LAPS) are field-effect-based sensors. A modulated light source is used to define the particular measurement spot to perform spatially resolved measurements of chemical species and to generate chemical images. In this work, an organic-LED (OLED) display has been chosen as a light source. This allows high measurement resolution and miniaturisation of the system. A new developed driving method for the OLED display optimised for LAPS-based measurements is demonstrated. The new method enables to define modulation frequencies between 1 kHz and 16 kHz and hence, reduces the measurement time of a chemical image by a factor of 40 compared to the traditional addressing of an OLED display.

Original languageEnglish
Pages (from-to)118-122
Number of pages5
JournalSensors and Actuators, B: Chemical
Publication statusPublished - 2012 Dec


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

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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