@article{GunGutkinLevetal.2011, author = {Gun, Jenny and Gutkin, Vitaly and Lev, Ovadia and Boyen, Hans-Gerd and Saitner, Marc and Wagner, Patrick and Olieslaeger, Marc D´ and Abouzar, Maryam H. and Poghossian, Arshak and Sch{\"o}ning, Michael Josef}, title = {Tracing gold nanoparticle charge by electrolyte-insulator-semiconductor devices}, series = {Journal of Physical Chemistry C. 115 (2011), H. 11}, journal = {Journal of Physical Chemistry C. 115 (2011), H. 11}, publisher = {American Cemical Society}, address = {Washington, DC}, isbn = {1932-7455}, pages = {4439 -- 4445}, year = {2011}, language = {en} } @article{GunRizkovLevetal.2008, author = {Gun, Jenny and Rizkov, Dan and Lev, Ovadia and Abouzar, Maryam H. and Poghossian, Arshak and Sch{\"o}ning, Michael Josef}, title = {Oxygen plasma-treated gold nanoparticle-based field-effect devices as transducer structures for bio-chemical sensing}, series = {Microchimica Acta. 164 (2008), H. 3-4}, journal = {Microchimica Acta. 164 (2008), H. 3-4}, isbn = {1436-5073}, pages = {395 -- 404}, year = {2008}, language = {en} } @article{GunSchoeningAbouzaretal.2008, author = {Gun, Jenny and Sch{\"o}ning, Michael Josef and Abouzar, Maryam H. and Poghossian, Arshak and Katz, Evgeny}, title = {Field-Effect Nanoparticle-Based Glucose Sensor on a Chip: Amplification Effect of Coimmobilized Redox Species}, series = {Electroanalysis. 20 (2008), H. 16}, journal = {Electroanalysis. 20 (2008), H. 16}, isbn = {1521-4109}, pages = {1748 -- 1753}, year = {2008}, 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 = {Device simulation of the light-addressable potentiometric sensor for the investigation of the spatial resolution}, series = {Sensors and actuators B: Chemical}, volume = {204}, journal = {Sensors and actuators B: Chemical}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-3077 (E-Journal); 0925-4005 (Print)}, doi = {10.1016/j.snb.2014.08.016}, 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.}, language = {en} } @article{GuoSekiMiyamotoetal.2014, author = {Guo, Yuanyuan and Seki, Kosuke and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo}, title = {Novel photoexcitation method for light-addressable potentiometric sensor with higher spatial resolution}, series = {Applied physics express : APEX}, volume = {7}, journal = {Applied physics express : APEX}, number = {6}, publisher = {IOP}, address = {Bristol}, issn = {1882-0786 (E-Journa); 1882-0778 (Print)}, doi = {10.7567/APEX.7.067301}, pages = {067301-4}, year = {2014}, abstract = {A novel photoexcitation method for the light-addressable potentiometric sensor (LAPS) is proposed to achieve a higher spatial resolution of chemical images. The proposed method employs a combined light source that consists of a modulated light probe, which generates the alternating photocurrent signal, and a ring of constant illumination surrounding it. The constant illumination generates a sheath of carriers with increased concentration which suppresses the spread of photocarriers by enhanced recombination. A device simulation was carried out to verify the effect of constant illumination on the spatial resolution, which demonstrated that a higher spatial resolution can be obtained.}, language = {en} } @article{GuoSekiMiyamotoetal.2014, author = {Guo, Yuanyuan and Seki, Kosuke and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo}, title = {Device simulation of the light-addressable potentiometric sensor with a novel photoexcitation method for a higher spatial resolution}, series = {Procedia Engineering}, volume = {87}, journal = {Procedia Engineering}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1877-7058}, doi = {10.1016/j.proeng.2014.11.369}, pages = {456 -- 459}, year = {2014}, abstract = {A novel photoexcitation method for the light-addressable potentiometric sensor (LAPS) realized a higher spatial resolution of chemical imaging. In this method, a modulated light probe, which generates the alternating photocurrent signal, is surrounded by a ring of constant light, which suppresses the lateral diffusion of photocarriers by enhancing recombination. A device simulation verified that a higher spatial resolution could be obtained by adjusting the gap between the modulated and constant light. It was also found that a higher intensity and a longer wavelength of constant light was more effective. However, there exists a tradeoff between the spatial resolution and the amplitude of the photocurrent, and thus, the signal-to-noise ratio. A tilted incidence of constant light was applied, which could achieve even higher resolution with a smaller loss of photocurrent.}, language = {en} } @article{HamadBilattoAdlyetal.2016, author = {Hamad, E. M. and Bilatto, S. E. R. and Adly, N. Y. and Correa, D. S. and Wolfrum, B. and Sch{\"o}ning, Michael Josef and Offenh{\"a}usser, A. and Yakushenko, A.}, title = {Inkjet printing of UV-curable adhesive and dielectric inks for microfluidic devices}, series = {Lab on a Chip}, volume = {16}, journal = {Lab on a Chip}, number = {1}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1473-0189}, doi = {10.1039/C5LC01195G}, pages = {70 -- 74}, year = {2016}, abstract = {Bonding of polymer-based microfluidics to polymer substrates still poses a challenge for Lab-On-a-Chip applications. Especially, when sensing elements are incorporated, patterned deposition of adhesives with curing at ambient conditions is required. Here, we demonstrate a fabrication method for fully printed microfluidic systems with sensing elements using inkjet and stereolithographic 3D-printing.}, language = {en} } @article{HeidenTurekSchoening2011, author = {Heiden, W. and Turek, M. and Sch{\"o}ning, Michael Josef}, title = {TasteIT : Analyzing chemical sensor data using fuzzy logic}, publisher = {IEEE}, address = {New York}, isbn = {978-1-4244-9910-6}, pages = {1 -- 6}, year = {2011}, language = {en} } @article{HeidenTurekSchoening2011, author = {Heiden, W. and Turek, M. and Sch{\"o}ning, Michael Josef}, title = {Analysis of chemical sensor data}, series = {Proceedings of the 4th Russian-German Workshop "Innovation Information Technologies: Theory and practice" : Ufa, Russia, April 8-13, 2011 / eds. Yupsova, Nafisa ...}, journal = {Proceedings of the 4th Russian-German Workshop "Innovation Information Technologies: Theory and practice" : Ufa, Russia, April 8-13, 2011 / eds. Yupsova, Nafisa ...}, publisher = {State Aviation Technical Univ.}, address = {Ufa}, isbn = {978-5-4221-0159-7}, pages = {76 -- 81}, year = {2011}, language = {en} } @article{HeiduschkaRomannEckenetal.2001, author = {Heiduschka, P. and Romann, I. and Ecken, H. and Sch{\"o}ning, Michael Josef and Schuhmann, W. and Thanos, S.}, title = {Defined adhesion and growth of neurones on artificial structured substrates}, series = {Scaling down in electrochemistry : electrochemical micro- and nanosystem technology ; proceedings of the 3rd International Symposium on Electrochemical Microsystem Technologies, Garmisch-Patenkirchen, Germany, 11 - 15 September 2000 / ed. by J. W. Schultz}, journal = {Scaling down in electrochemistry : electrochemical micro- and nanosystem technology ; proceedings of the 3rd International Symposium on Electrochemical Microsystem Technologies, Garmisch-Patenkirchen, Germany, 11 - 15 September 2000 / ed. by J. W. Schultz}, publisher = {Elsevier [u.a.]}, address = {Amsterdam [u.a.]}, isbn = {0-08-044014-2}, pages = {299 -- 307}, year = {2001}, language = {en} }