@article{MiyamotoWagnerMimuraetal.2011,
  author    = {Miyamoto, Ko-ichiro and Wagner, Torsten and Mimura, Shuhei and Kanoh, Shin{\´i}chiro and Yoshinobu, Tatsuo and Sch{\"o}ning, Michael Josef},
  title     = {Constant-phase-mode operation of the light-addressable potentiometric sensor},
  series = {Sensors and Actuators B: Chemical. 154 (2011), H. 2},
  journal   = {Sensors and Actuators B: Chemical. 154 (2011), H. 2},
  publisher = {Elsevier},
  address   = {Amsterdam},
  isbn      = {1873-3077},
  pages     = {119 -- 123},
  year      = {2011},
  language  = {en}
}
@article{MiyamotoWagnerYoshinobuetal.2011,
  author    = {Miyamoto, Ko-ichiro and Wagner, Torsten and Yoshinobu, Tatsuo and Kanoh, Shin`ichiro and Sch{\"o}ning, Michael Josef},
  title     = {Phase-mode LAPS and its application to chemical imaging},
  series = {Sensors and Actuators B: Chemical. 154 (2011), H. 1},
  journal   = {Sensors and Actuators B: Chemical. 154 (2011), H. 1},
  publisher = {Elsevier},
  address   = {Amsterdam},
  isbn      = {1873-3077},
  pages     = {28 -- 32},
  year      = {2011},
  language  = {en}
}
@article{MiyamotoYoshidaSakaietal.2011,
  author    = {Miyamoto, Ko-ichiro and Yoshida, Midori and Sakai, Taito and Matsuzaka, Atsushi and Wagner, Torsten and Kanoh, Sanoh and Yoshinobu, Tatsuo and Sch{\"o}ning, Michael Josef},
  title     = {Differential setup of light-addressable potentiometric sensor with an enzyme reactor in a flow channel},
  series = {Japanese Journal of Applied Physics. 50 (2011)},
  journal   = {Japanese Journal of Applied Physics. 50 (2011)},
  publisher = {Japan Society of Applied Physics},
  address   = {Bristol},
  isbn      = {0021-4922},
  pages     = {04DL08-1 -- 04DL08-5},
  year      = {2011},
  language  = {en}
}
@article{MiyamotoWagnerYoshinobuetal.2011,
  author    = {Miyamoto, Ko-ichiro and Wagner, Torsten and Yoshinobu, Tatsuo and Kanoh, Shin`ichiro and Sch{\"o}ning, Michael Josef},
  title     = {Phase-mode operation of FDM-LAPS},
  series = {Sensor letters},
  volume    = {9},
  journal   = {Sensor letters},
  number    = {2},
  publisher = {American Scientific Publishers},
  address   = {Stevenson Ranch, Calif.},
  isbn      = {1546-1971},
  pages     = {691 -- 694},
  year      = {2011},
  language  = {en}
}
@article{WagnerMiyamotoSchoeningetal.2010,
  author    = {Wagner, Torsten and Miyamoto, Ko-ichiro and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo},
  title     = {Novel combination of digital light processing (DLP) and light-addressable potentiometric sensors (LAPS) for flexible chemical imaging},
  series = {Procedia Engineering. 5 (2010)},
  journal   = {Procedia Engineering. 5 (2010)},
  isbn      = {1877-7058},
  pages     = {520 -- 523},
  year      = {2010},
  language  = {en}
}
@article{MiyamotoKanekoMatsuoetal.2010,
  author    = {Miyamoto, Ko-ichiro and Kaneko, Kazumi and Matsuo, Akira and Wagner, Torsten and Kanoh, Shin`ichiro and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo},
  title     = {Miniaturized chemical imaging sensor system using an OLED display panel},
  series = {Procedia Engineering. 5 (2010)},
  journal   = {Procedia Engineering. 5 (2010)},
  isbn      = {1877-7058},
  pages     = {516 -- 519},
  year      = {2010},
  language  = {en}
}
@inproceedings{YoshinobuMiyamotoWagneretal.2012,
  author    = {Yoshinobu, Tatsuo and Miyamoto, Ko-Ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef},
  title     = {Miniaturized and high-speed chemical imaging systems},
  series = {Nano-Biomedical Engineering 2012. Proceedings of the Tohoku University Global Centre of Excellence Programme, Sakura Hall, Tohoku University, Sendai Japan, 5 - 6 March 2012},
  booktitle = {Nano-Biomedical Engineering 2012. Proceedings of the Tohoku University Global Centre of Excellence Programme, Sakura Hall, Tohoku University, Sendai Japan, 5 - 6 March 2012},
  editor    = {Yamaguchi, Takami},
  publisher = {World Scientific},
  address   = {Singapur},
  doi       = {10.1142/9781848169067_0045},
  pages     = {386 -- 395},
  year      = {2012},
  language  = {en}
}
@article{WernerWagnerYoshinobuetal.2013,
  author    = {Werner, Frederik and Wagner, Torsten and Yoshinobu, Tatsuo and Keusgen, Michael and Sch{\"o}ning, Michael Josef},
  title     = {Frequency behaviour of light-addressable potentiometric sensors},
  series = {Physica Status Solidi (A)},
  volume    = {210},
  journal   = {Physica Status Solidi (A)},
  number    = {5},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1521-396X ; 0031-8965},
  doi       = {10.1002/pssa.201200929},
  pages     = {884 -- 891},
  year      = {2013},
  abstract  = {Light-addressable potentiometric sensors (LAPS) are semiconductor-based potentiometric sensors, with the advantage to detect the concentration of a chemical species in a liquid solution above the sensor surface in a spatially resolved manner. The addressing is achieved by a modulated and focused light source illuminating the semiconductor and generating a concentration-depending photocurrent. This work introduces a LAPS set-up that is able to monitor the electrical impedance in addition to the photocurrent. The impedance spectra of a LAPS structure, with and without illumination, as well as the frequency behaviour of the LAPS measurement are investigated. The measurements are supported by electrical equivalent circuits to explain the impedance and the LAPS-frequency behaviour. The work investigates the influence of different parameters on the frequency behaviour of the LAPS. Furthermore, the phase shift of the photocurrent, the influence of the surface potential as well as the changes of the sensor impedance will be discussed.},
  language  = {en}
}
@article{KloockMorenoBratovetal.2006,
  author    = {Kloock, Joachim P. and Moreno, Lia and Bratov, A. and Huachupoma, S. and Xu, J. and Wagner, Torsten and Yoshinobu, T. and Ermolenko, Y. and Vlasov, Y. G. and Sch{\"o}ning, Michael Josef},
  title     = {PLD-prepared cadmium sensors based on chalcogenide glasses —ISFET, LAPS and \&\#956;ISE semiconductor structures},
  series = {Sensors and Actuators B: Chemical. 118 (2006), H. 1-2},
  journal   = {Sensors and Actuators B: Chemical. 118 (2006), H. 1-2},
  isbn      = {0925-4005},
  pages     = {149 -- 155},
  year      = {2006},
  language  = {en}
}
@article{WagnerRaoKloocketal.2006,
  author    = {Wagner, Torsten and Rao, C. and Kloock, Joachim P. and Yoshinobu, T. and Otto, R. and Keusgen, M. and Sch{\"o}ning, Michael Josef},
  title     = {"LAPS Card"—A novel chip card-based light-addressable potentiometric sensor (LAPS)},
  series = {Sensors and Actuators B: Chemical. 118 (2006), H. 1-2},
  journal   = {Sensors and Actuators B: Chemical. 118 (2006), H. 1-2},
  isbn      = {0925-4005},
  pages     = {33 -- 40},
  year      = {2006},
  language  = {en}
}
@article{MiyamotoKuwabaraKanohetal.2009,
  author    = {Miyamoto, K. and Kuwabara, Yohei and Kanoh, Shin'ichiro and Yoshinobu, Tatsuo and Wagner, Torsten and Sch{\"o}ning, Michael Josef},
  title     = {Chemical image scanner based on FDM-LAPS},
  series = {Sensors and Actuators B: Chemical. 137 (2009), H. 2},
  journal   = {Sensors and Actuators B: Chemical. 137 (2009), H. 2},
  publisher = {Elsevier},
  address   = {Amsterdam},
  isbn      = {0925-4005},
  pages     = {533 -- 538},
  year      = {2009},
  language  = {en}
}
@article{WagnerWernerMiyamotoetal.2010,
  author    = {Wagner, Torsten and Werner, Frederik and Miyamoto, Ko-ichiro and Ackermann, Hans-Josef and Yoshinobu, Tatsuo and Sch{\"o}ning, Michael Josef},
  title     = {FPGA-based LAPS device for the flexible design of sensing sites on functional interfaces},
  series = {Physica Status Solidi (A). 207 (2010), H. 4},
  journal   = {Physica Status Solidi (A). 207 (2010), H. 4},
  isbn      = {1862-6300},
  pages     = {844 -- 849},
  year      = {2010},
  language  = {en}
}
@article{WagnerMiyamotoWerneretal.2011,
  author    = {Wagner, Torsten and Miyamoto, K. and Werner, Frederik and Sch{\"o}ning, Michael Josef and Yoshinobu, T.},
  title     = {Flexible electrochemical imaging with "zoom-in" functionality by using a new type of light-addressable potentiometric sensor},
  publisher = {IEEE},
  address   = {New York},
  pages     = {2133 -- 2135},
  year      = {2011},
  language  = {en}
}
@article{MiyamotoWagnerSchoeningetal.2011,
  author    = {Miyamoto, K. and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, T.},
  title     = {Multi-well structure for cell culture on the chemical imaging sensor},
  publisher = {IEEE},
  address   = {New York},
  pages     = {2130 -- 2132},
  year      = {2011},
  language  = {en}
}
@article{WernerGroebelKrumbeetal.2012,
  author    = {Werner, Frederik and Groebel, Simone and Krumbe, Christoph and Wagner, Torsten and Selmer, Thorsten and Yoshinobu, Tatsuo and Baumann, Marcus and Sch{\"o}ning, Michael Josef},
  title     = {Nutrient concentration-sensitive microorganism-based biosensor},
  series = {Physica Status Solidi (a)},
  volume    = {209},
  journal   = {Physica Status Solidi (a)},
  number    = {5},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1862-6319},
  doi       = {10.1002/pssa.201100801},
  pages     = {900 -- 904},
  year      = {2012},
  language  = {en}
}
@article{ItabashiKosakaMiyamotoetal.2013,
  author    = {Itabashi, Akinori and Kosaka, Naoki and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef},
  title     = {High-speed chemical imaging system based on front-side-illuminated LAPS},
  series = {Sensors and actuators B: Chemical},
  volume    = {182},
  journal   = {Sensors and actuators B: Chemical},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1873-3077},
  doi       = {10.1016/j.snb.2013.03.016},
  pages     = {315 -- 321},
  year      = {2013},
  abstract  = {The chemical imaging sensor is a semiconductor-based chemical sensor that can visualize the spatial distribution of specific ions on the sensing surface. The conventional chemical imaging system based on the light-addressable potentiometric sensor (LAPS), however, required a long time to obtain a chemical image, due to the slow mechanical scan of a single light beam. For high-speed imaging, a plurality of light beams modulated at different frequencies can be employed to measure the ion concentrations simultaneously at different locations on the sensor plate by frequency division multiplex (FDM). However, the conventional measurement geometry of back-side illumination limited the bandwidth of the modulation frequency required for FDM measurement, because of the low-pass filtering characteristics of carrier diffusion in the Si substrate. In this study, a high-speed chemical imaging system based on front-side-illuminated LAPS was developed, which achieved high-speed spatiotemporal recording of pH change at a rate of 70 frames per second.},
  language  = {en}
}
@article{MiyamotoHirayamaWagneretal.2013,
  author    = {Miyamoto, Ko-ichiro and Hirayama, Yuji and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo},
  title     = {Visualization of enzymatic reaction in a microfluidic channel using chemical imaging sensor},
  series = {Electrochimica acta},
  journal   = {Electrochimica acta},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1873-3859 (E-Journal); 0013-4686 (Print)},
  pages     = {Publ. online},
  year      = {2013},
  language  = {en}
}
@inproceedings{TakenagaHerreraWerneretal.2013,
  author    = {Takenaga, Shoko and Herrera, Cony F. and Werner, Frederik and Biselli, Manfred and Schnitzler, Thomas and Sch{\"o}ning, Michael Josef and {\"O}hlschl{\"a}ger, Peter and Wagner, Torsten},
  title     = {Detection of the metabolic activity of cells by differential measurements based on a single light-addressable potentiometric sensor chip},
  series = {11. Dresdner Sensor-Symposium : 9.-11.12.2013},
  booktitle = {11. Dresdner Sensor-Symposium : 9.-11.12.2013},
  organization    = {Dresdner Sensor-Symposium <11, 2013>},
  isbn      = {978-3-9813484-5-3},
  pages     = {63 -- 67},
  year      = {2013},
  language  = {en}
}
@article{TakenagaBiselliSchnitzleretal.2014,
  author    = {Takenaga, Shoko and Biselli, Manfred and Schnitzler, Thomas and {\"O}hlschl{\"a}ger, Peter and Wagner, Torsten and Sch{\"o}ning, Michael Josef},
  title     = {Toward multi-analyte bioarray sensors: LAPS-based on-chip determination of a Michaelis-Menten-like kinetics for cell culturing},
  series = {Physica status solidi A : Applications and materials science},
  volume    = {211},
  journal   = {Physica status solidi A : Applications and materials science},
  number    = {6},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1521-396X (E); 1862-6319 (E-Journal); 0031-8965 (Print); 1862-6300 (Print)},
  doi       = {10.1002/pssa.201330464},
  pages     = {1410 -- 1415},
  year      = {2014},
  abstract  = {The metabolic activity of Chinese hamster ovary (CHO) cells was observed using a light-addressable potentiometric sensor (LAPS). The dependency toward different glucose concentrations (17-200 mM) follows a Michaelis-Menten kinetics trajectory with Kₘ = 32.8 mM, and the obtained Kₘ value in this experiment was compared with that found in literature. In addition, the pH shift induced by glucose metabolism of tumor cells transfected with the HPV-16 genome (C3 cells) was successfully observed. These results indicate the possibility to determine the tumor cells metabolism with a LAPS-based measurement device.},
  language  = {en}
}
@article{GuoMiyamotoWagneretal.2014,
  author    = {Guo, Yuanyuan and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo},
  title     = {Theoretical study and simulation of light-addressable potentiometric sensors},
  series = {Physica status solidi (A) : applications and materials},
  volume    = {211},
  journal   = {Physica status solidi (A) : applications and materials},
  number    = {6},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {0031-8965},
  doi       = {10.1002/pssa.201330354},
  pages     = {1467 -- 1472},
  year      = {2014},
  abstract  = {The light-addressable potentiometric sensor (LAPS) is a semiconductor-based potentiometric sensor using a light probe with an ability of detecting the concentration of biochemical species in a spatially resolved manner. As an important biomedical sensor, research has been conducted to improve its performance, for instance, to realize high-speed measurement. In this work, the idea of facilitating the device-level simulation, instead of using an equivalent-circuit model, is presented for detailed analysis and optimization of the performance of the LAPS. Both carrier distribution and photocurrent response have been simulated to provide new insight into both amplitude-mode and phase-mode operations of the LAPS. Various device parameters can be examined to effectively design and optimize the LAPS structures and setups for enhanced performance.},
  language  = {en}
}