% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Guo:186651,
      author       = {Guo, Yuanyuan and Miyamoto, Ko-ichiro and Wagner, Torsten
                      and Schöning, Michael J. and Yoshinobu, Tatsuo},
      title        = {{D}evice simulation of the light-addressable potentiometric
                      sensor for the investigation of the spatial resolution},
      journal      = {Sensors and actuators / B},
      volume       = {204},
      issn         = {0925-4005},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-00724},
      pages        = {659 - 665},
      year         = {2014},
      abstract     = {As a semiconductor-based electrochemical sensor, the
                      light-addressable potentiometric sensor (LAPS) can realize
                      two dimensional visualization of (bio-)chemical reactions at
                      the sensor surface addressed by localized illumination.
                      Thanks to this imaging capability, various applications in
                      biochemical and biomedical fields are expected, for which
                      the spatial resolution is critically significant. In this
                      study, therefore, the spatial resolution of the LAPS was
                      investigated in detail based on the device simulation. By
                      calculating the spatiotemporal change of the distributions
                      of electrons and holes inside the semiconductor layer in
                      response to a modulated illumination, the photocurrent
                      response as well as the spatial resolution was obtained as a
                      function of various parameters such as the thickness of the
                      Si substrate, the doping concentration, the wavelength and
                      the intensity of illumination.The simulation results
                      verified that both thinning the semiconductor substrate and
                      increasing the doping concentration could improve the
                      spatial resolution, which were in good agreement with known
                      experimental results and theoretical analysis. More
                      importantly, new findings of interests were also obtained.
                      As for the dependence on the wavelength of illumination, it
                      was found that the known dependence was not always the case.
                      When the Si substrate was thick, a longer wavelength
                      resulted in a higher spatial resolution which was known by
                      experiments. When the Si substrate was thin, however, a
                      longer wavelength of light resulted in a lower spatial
                      resolution. This finding was explained as an effect of
                      raised concentration of carriers, which reduced the
                      thickness of the space charge region.The device simulation
                      was found to be helpful to understand the relationship
                      between the spatial resolution and device parameters, to
                      understand the physics behind it, and to optimize the device
                      structure and measurement conditions for realizing higher
                      performance of chemical imaging systems.},
      cin          = {PGI-8 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-8-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {423 - Sensorics and bioinspired systems (POF2-423)},
      pid          = {G:(DE-HGF)POF2-423},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000343116400083},
      doi          = {10.1016/j.snb.2014.08.016},
      url          = {https://juser.fz-juelich.de/record/186651},
}