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(Bio-)chemical Sensing and Imaging by LAPS and SPIM

  • Tatsuo Yoshinobu
  • Steffi Krause
  • Ko-ichiro Miyamoto
  • Carl Frederik Werner
  • Arshak Poghossian
  • Torsten Wagner
  • Michael J. Schöning
Chapter
Part of the Springer Series on Chemical Sensors and Biosensors book series (SSSENSORS, volume 16)

Abstract

The light-addressable potentiometric sensor (LAPS) and scanning photo-induced impedance microscopy (SPIM) are two closely related methods to visualise the distributions of chemical species and impedance, respectively, at the interface between the sensing surface and the sample solution. They both have the same field-effect structure based on a semiconductor, which allows spatially resolved and label-free measurement of chemical species and impedance in the form of a photocurrent signal generated by a scanning light beam. In this article, the principles and various operation modes of LAPS and SPIM, functionalisation of the sensing surface for measuring various species, LAPS-based chemical imaging and high-resolution sensors based on silicon-on-sapphire substrates are described and discussed, focusing on their technical details and prospective applications.

Keywords

Chemical imaging Field-effect device Light-addressable potentiometric sensor Potentiometry Scanning photo-induced impedance microscopy 

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Tatsuo Yoshinobu
    • 1
    • 2
  • Steffi Krause
    • 3
  • Ko-ichiro Miyamoto
    • 2
  • Carl Frederik Werner
    • 2
  • Arshak Poghossian
    • 4
    • 5
  • Torsten Wagner
    • 4
    • 5
  • Michael J. Schöning
    • 4
    • 5
  1. 1.Department of Biomedical EngineeringTohoku UniversitySendaiJapan
  2. 2.Department of Electronic EngineeringTohoku UniversitySendaiJapan
  3. 3.School of Engineering and Materials ScienceQueen Mary University of LondonLondonUK
  4. 4.Institute of Nano- and BiotechnologiesAachen University of Applied SciencesJülichGermany
  5. 5.Institute of Complex Systems (ICS-8), Forschungszentrum Jülich GmbHJülichGermany

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