TY  - JOUR
A1  - Wilming, Anja
A1  - Begemann, Jens
A1  - Kuhne, Stefan
A1  - Regestein, Lars
A1  - Bongaerts, Johannes
A1  - Evers, Stefan
A1  - Maurer, Karl-Heinz
A1  - Büchs, Jochen
T1  - Metabolic studies of γ-polyglutamic acid production in Bacillus licheniformis by small-scale continuous cultivations
JF  - Biochemical engineering journal
Y1  - 2013
SN  - 1873-295X (E-Journal); 1369-703X (Print)
VL  - Vol. 73
SP  - 29
EP  - 37
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wiegand, Sandra
A1  - Dietrich, Sascha
A1  - Hertel, Robert
A1  - Bongaerts, Johannes
A1  - Evers, Stefan
A1  - Volland, Sonja
A1  - Daniel, Rolf
A1  - Liesegang, Heiko
T1  - RNA-Seq of Bacillus licheniformis: active regulatory RNA features expressed within a productive fermentation
JF  - BMC genomics
Y1  - 2013
SN  - 1471-2164
VL  - Vol. 14
SP  - 667
PB  - BioMed Central
CY  - London
ER  - 
TY  - JOUR
A1  - Whitehead, Mark
A1  - Öhlschläger, Peter
A1  - Almajhdi, Fahad N.
A1  - Alloza, Leonor
A1  - Marzábal, Pablo
A1  - Meyers, Ann E.
A1  - Hitzeroth, Inga I.
A1  - Rybicki, Edward P.
T1  - Human papillomavirus (HPV) type 16 E7 protein bodies cause tumour regression in mice
JF  - BMC cancer
Y1  - 2014
U6  - http://dx.doi.org/10.1186/1471-2407-14-367
SN  - 1471-2407
IS  - 14:367
SP  - 1
EP  - 15
PB  - BioMed Central
CY  - London
ER  - 
TY  - JOUR
A1  - Wert, Stefan
A1  - Iken, Heiko
A1  - Schöning, Michael Josef
A1  - Matysik, Frank-Michael
T1  - Development of a temperature‐pulse enhanced electrochemical glucose biosensor and characterization of its stability via scanning electrochemical microscopy
JF  - Electroanalysis
N2  - Glucose oxidase (GOx) is an enzyme frequently used in glucose biosensors. As increased temperatures can enhance the performance of electrochemical sensors, we investigated the impact of temperature pulses on GOx that was drop-coated on flattened Pt microwires. The wires were heated by an alternating current. The sensitivity towards glucose and the temperature stability of GOx was investigated by amperometry. An up to 22-fold increase of sensitivity was observed. Spatially resolved enzyme activity changes were investigated via scanning electrochemical microscopy. The application of short (<100 ms) heat pulses was associated with less thermal inactivation of the immobilized GOx than long-term heating.
Y1  - 2021
U6  - http://dx.doi.org/10.1002/elan.202100089
SN  - 1521-4109
IS  - Early View
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Wagner, Torsten
A1  - Yoshinobu, Tatsuo
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Frequency behaviour of light-addressable potentiometric sensors
JF  - Physica Status Solidi (A)
N2  - 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.
Y1  - 2013
U6  - http://dx.doi.org/10.1002/pssa.201200929
SN  - 1521-396X ; 0031-8965
VL  - 210
IS  - 5
SP  - 884
EP  - 891
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Wagner, Torsten
A1  - Miyamoto, Ko-ichiro
A1  - Yoshinobu, Tatsuo
A1  - Schöning, Michael Josef
T1  - High speed and high resolution chemical imaging based on a new type of OLED-LAPS set-up
JF  - Sensors and Actuators B: Chemical
N2  - 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.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.snb.2011.12.102
SN  - 0925-4005
N1  - Part of special issue "Selected Papers presented at Eurosensors XXV"
VL  - 175
SP  - 118
EP  - 122
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Wagner, Torsten
A1  - Miyamoto, Ko-ichiro
A1  - Yoshinobu, Tatsuo
A1  - Schöning, Michael Josef
T1  - High speed and high resolution chemical imaging based on a new type of OLED-LAPS set-up
JF  - Procedia Engineering. 25 (2011)
Y1  - 2011
SN  - 1877-7058
N1  - EurosensorsXXV ; Proc. Eurosensors XXV, September 4-7, 2011, Athens, Greece
SP  - 346
EP  - 349
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Takenaga, Shoko
A1  - Taki, Hidenori
A1  - Sawada, Kazuaki
A1  - Schöning, Michael Josef
T1  - Comparison of label-free ACh-imaging sensors based on CCD and LAPS
JF  - Sensors and  Actuators B: Chemical (2012)
N2  - Semiconductor-based chemical imaging sensors, like the light-addressable potentiometric sensor (LAPS) or the pH-imaging sensor based on a charge-coupled device (CCD), are becoming a powerful tool for label-free imaging of biological phenomena. We have proposed a polyion-based enzymatic membrane to develop an acetylcholine (ACh) imaging sensor for neural cell-activity observations. In this study, a CCD-type ACh-imaging sensor and a LAPS-type ACh-imaging sensor were fabricated and the prospect of both sensors was clarified by making a comparison of their basic characteristics.
Y1  - 2013
SN  - 0925-4005
VL  - 177
SP  - 745
EP  - 752
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Spelthahn, H.
A1  - Schöning, Michael Josef
A1  - Krumbe, C.
A1  - Wagner, Torsten
A1  - Yoshinobu, T.
A1  - Keusgen, M.
T1  - Neue Ansteuerungselektronik für LAPS-basierte Biosensoren zur gleichzeitig ortsaufgelösten Messung der pH-Konzentration
JF  - Sensoren und Messsysteme 2010 [Elektronische Ressource] : Vorträge der 15. ITG/GMA-Fachtagung vom 18. bis 19. Mai 2010 in Nürnberg / Informationstechnische Gesellschaft im VDE (ITG); VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA)
Y1  - 2010
SN  - 978-3-8007-3260-9
N1  - Fachtagung Sensoren und Messsysteme 15, 2010, Nürnberg ; Gesellschaft Mess- und Automatisierungstechnik
SP  - 109
EP  - 114
PB  - VDE Verlag
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Schusser, Sebastian
A1  - Spalthahn, Heiko
A1  - Wagner, Torsten
A1  - Yoshinobu, Tatsuo
A1  - Schöning, Michael Josef
T1  - Field-programmable gate array based controller for multi spot light-addressable potentiometric sensors with integrated signal correction mode
JF  - Electrochimica Acta
N2  - A light-addressable potentiometric sensor (LAPS) can measure the concentration of one or several analytes at the sensor surface simultaneously in a spatially resolved manner. A modulated light pointer stimulates the semiconductor structure at the area of interest and a responding photocurrent can be read out. By simultaneous stimulation of several areas with light pointers of different modulation frequencies, the read out can be performed at the same time. With the new proposed controller electronic based on a field-programmable gate array (FPGA), it is possible to control the modulation frequencies, phase shifts, and light brightness of multiple light pointers independently and simultaneously. Thus, it is possible to investigate the frequency response of the sensor, and to examine the analyte concentration by the determination of the surface potential with the help of current/voltage curves and phase/voltage curves. Additionally, the ability to individually change the light intensities of each light pointer is used to perform signal correction.
Y1  - 2011
U6  - http://dx.doi.org/10.1016/j.electacta.2011.03.012
SN  - 0013-4686
VL  - 56
IS  - 26
SP  - 9656
EP  - 9660
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Miyamoto, Ko-ichiro
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - Lateral resolution enhancement of pulse-driven light-addressable potentiometric sensor
JF  - Sensor and Actuators B: Chemical
N2  - To study chemical and biological processes, spatially resolved determination of the concentrations of one or more analyte species is of distinct interest. With a light-addressable potentiometric sensor (LAPS), chemical images can be created, which visualize the concentration distribution above the sensor plate. One important challenge is to achieve a good lateral resolution in order to detect events that take place in a small and limited region. LAPS utilizes a focused light spot to address the measurement region. By moving this light spot along the semiconductor sensor plate, the concentration distribution can be observed. In this study, we show that utilizing a pulse as light excitation instead of a traditionally used continuously modulated light excitation, the lateral resolution can be improved by a factor of 6 or more.
KW  - Chemical images
KW  - LAPS
KW  - Light-addressable potentiometric sensor
Y1  - 2017
U6  - http://dx.doi.org/10.1016/j.snb.2017.02.057
SN  - 0925-4005
VL  - 248
SP  - 961
EP  - 965
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Krumbe, Christoph
A1  - Schumacher, Katharina
A1  - Groebel, Simone
A1  - Spelthahn, Heiko
A1  - Stellberg, Michael
A1  - Wagner, Torsten
A1  - Yoshinobu, Tatsuo
A1  - Selmer, Thorsten
A1  - Keusgen, Michael
A1  - Baumann, Marcus
A1  - Schöning, Michael Josef
T1  - Determination of the extracellular acidification of Escherichia coli by a light-addressable potentiometric sensor
JF  - Physica status solidi (a) : applications and material science. 208 (2011), H. 6
Y1  - 2011
SN  - 1862-6319
SP  - 1340
EP  - 1344
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Groebel, Simone
A1  - Wagner, Torsten
A1  - Yoshinobu, Tatsuo
A1  - Selmer, Thorsten
A1  - Baumann, Marcus
A1  - Schöning, Michael Josef
T1  - Überwachung der metabolischen Aktivität von Mikroorganismen zur Kontrolle des biologischen Prozesses im Biogasfermenter
JF  - Biogas 2011 : Energieträger der Zukunft ; 6. Fachtagung, Fachtagung Braunschweig, 08. und 09. Juni 2011 / VDI Energie und Umwelt
Y1  - 2011
SN  - 978-3-18-092121-1
N1  - Gesellschaft Energie und Umwelt ; Fachtagung Biogas ; (6 : ; 2011.06.08-09 : ; Braunschweig) ; 	VDI-Berichte ; 2121
SP  - 285
EP  - 286
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Groebel, Simone
A1  - Schuhmacher, K.
A1  - Spelthahn, Heiko
A1  - Wagner, Torsten
A1  - Selmer, Thorsten
A1  - Baumann, Marcus
A1  - Schöning, Michael Josef
T1  - Bestimmung der metabolischen Aktivität von Mikroorganismen während des Biogasbildungsprozesses
JF  - 9. Dresdner Sensor-Symposium : Dresden, 07.-09. Dezember 2009 / Gerlach, Gerald ; Hauptmann, Peter [Hrsg.]
Y1  - 2009
SN  - 978-3-941298-44-6
N1  - Dresdner Sensor-Symposium ; (9, 2009, Dresden)
SP  - 201
EP  - 204
PB  - TUDpress
CY  - Dresden
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Groebel, Simone
A1  - Krumbe, Christoph
A1  - Wagner, Torsten
A1  - Selmer, Thorsten
A1  - Yoshinobu, Tatsuo
A1  - Baumann, Marcus
A1  - Schöning, Michael Josef
T1  - Nutrient concentration-sensitive microorganism-based biosensor
JF  - Physica Status Solidi (a)
Y1  - 2012
U6  - http://dx.doi.org/10.1002/pssa.201100801
SN  - 1862-6319
VL  - 209
IS  - 5
SP  - 900
EP  - 904
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Wendlandt, Tim
A1  - Koch, Claudia
A1  - Britz, Beate
A1  - Liedek, Anke
A1  - Schmidt, Nora
A1  - Werner, Stefan
A1  - Gleba, Yuri
A1  - Vahidpour, Farnoosh
A1  - Welden, Melanie
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
T1  - Facile Purification and Use of Tobamoviral Nanocarriers for Antibody-Mediated Display of a Two-Enzyme System
JF  - Viruses
N2  - Immunosorbent turnip vein clearing virus (TVCV) particles displaying the IgG-binding domains D and E of Staphylococcus aureus protein A (PA) on every coat protein (CP) subunit (TVCVPA) were purified from plants via optimized and new protocols. The latter used polyethylene glycol (PEG) raw precipitates, from which virions were selectively re-solubilized in reverse PEG concentration gradients. This procedure improved the integrity of both TVCVPA and the wild-type subgroup 3 tobamovirus. TVCVPA could be loaded with more than 500 IgGs per virion, which mediated the immunocapture of fluorescent dyes, GFP, and active enzymes. Bi-enzyme ensembles of cooperating glucose oxidase and horseradish peroxidase were tethered together on the TVCVPA carriers via a single antibody type, with one enzyme conjugated chemically to its Fc region, and the other one bound as a target, yielding synthetic multi-enzyme complexes. In microtiter plates, the TVCVPA-displayed sugar-sensing system possessed a considerably increased reusability upon repeated testing, compared to the IgG-bound enzyme pair in the absence of the virus. A high coverage of the viral adapters was also achieved on Ta2O5 sensor chip surfaces coated with a polyelectrolyte interlayer, as a prerequisite for durable TVCVPA-assisted electrochemical biosensing via modularly IgG-assembled sensor enzymes.
KW  - biosensor
KW  - horseradish peroxidase (HRP)
KW  - glucose oxidase (GOx)
KW  - enzyme cascade
KW  - turnip vein clearing virus (TVCV)
KW  - tobacco mosaic virus (TMV)
Y1  - 2023
U6  - http://dx.doi.org/doi.org/10.3390/v15091951
SN  - 1999-4915
N1  - This article belongs to the Special Issue "Tobamoviruses 2023"
VL  - 9
IS  - 15
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Welden, Rene
A1  - Schöning, Michael Josef
A1  - Wagner, Patrick H.
A1  - Wagner, Torsten
T1  - Light-Addressable Electrodes for Dynamic and Flexible Addressing of Biological Systems and Electrochemical Reactions
JF  - Sensors
N2  - In this review article, we are going to present an overview on possible applications of light-addressable electrodes (LAE) as actuator/manipulation devices besides classical electrode structures. For LAEs, the electrode material consists of a semiconductor. Illumination with a light source with the appropiate wavelength leads to the generation of electron-hole pairs which can be utilized for further photoelectrochemical reaction. Due to recent progress in light-projection technologies, highly dynamic and flexible illumination patterns can be generated, opening new possibilities for light-addressable electrodes. A short introduction on semiconductor–electrolyte interfaces with light stimulation is given together with electrode-design approaches. Towards applications, the stimulation of cells with different electrode materials and fabrication designs is explained, followed by analyte-manipulation strategies and spatially resolved photoelectrochemical deposition of different material types.
Y1  - 2020
U6  - http://dx.doi.org/10.3390/s20061680
SN  - 1424-8220
VL  - 20
IS  - 6
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Welden, Rene
A1  - Scheja, Sabrina
A1  - Schöning, Michael Josef
A1  - Wagner, Patrick
A1  - Wagner, Torsten
T1  - Electrochemical Evaluation of Light‐Addressable Electrodes Based on TiO2 for the Integration in Lab‐on‐Chip Systems
JF  - physica status solidi a : applications and materials sciences
N2  - In lab-on-chip systems, electrodes are important for the manipulation (e.g., cell stimulation, electrolysis) within such systems. An alternative to commonly used electrode structures can be a light-addressable electrode. Here, due to the photoelectric effect, the conducting area can be adjusted by modification of the illumination area which enables a flexible control of the electrode. In this work, titanium dioxide based light-addressable electrodes are fabricated by a sol–gel technique and a spin-coating process, to deposit a thin film on a fluorine-doped tin oxide glass. To characterize the fabricated electrodes, the thickness, and morphological structure are measured by a profilometer and a scanning electron microscope. For the electrochemical behavior, the dark current and the photocurrent are determined for various film thicknesses. For the spatial resolution behavior, the dependency of the photocurrent while changing the area of the illuminated area is studied. Furthermore, the addressing of single fluid compartments in a three-chamber system, which is added to the electrode, is demonstrated.
Y1  - 2018
U6  - http://dx.doi.org/10.1002/pssa.201800150
SN  - 1862-6319
VL  - 215
IS  - 15
SP  - Article number 1800150
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Welden, Rene
A1  - Jablonski, Melanie
A1  - Wege, Christina
A1  - Keusgen, Michael
A1  - Wagner, Patrick Hermann
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
T1  - Light-Addressable Actuator-Sensor Platform for Monitoring and Manipulation of pH Gradients in Microfluidics: A Case Study with the Enzyme Penicillinase
JF  - Biosensors
N2  - The feasibility of light-addressed detection and manipulation of pH gradients inside an electrochemical microfluidic cell was studied. Local pH changes, induced by a light-addressable electrode (LAE), were detected using a light-addressable potentiometric sensor (LAPS) with different measurement modes representing an actuator-sensor system. Biosensor functionality was examined depending on locally induced pH gradients with the help of the model enzyme penicillinase, which had been immobilized in the microfluidic channel. The surface morphology of the LAE and enzyme-functionalized LAPS was studied by scanning electron microscopy. Furthermore, the penicillin sensitivity of the LAPS inside the microfluidic channel was determined with regard to the analyte’s pH influence on the enzymatic reaction rate. In a final experiment, the LAE-controlled pH inhibition of the enzyme activity was monitored by the LAPS.
KW  - microfluidics
KW  - enzyme kinetics
KW  - actuator-sensor system
KW  - light-addressable electrode
KW  - light-addressable potentiometric sensor
Y1  - 2021
U6  - http://dx.doi.org/10.3390/bios11060171
SN  - 2079-6374
N1  - This article belongs to the Special Issue "Selected Papers from the 1st International Electronic Conference on Biosensors (IECB 2020)"
VL  - 11
IS  - 6
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Welden, Melanie
A1  - Severins, Robin
A1  - Poghossian, Arshak
A1  - Wege, Christina
A1  - Bongaerts, Johannes
A1  - Siegert, Petra
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Detection of acetoin and diacetyl by a tobacco mosaic virus-assisted field-effect biosensor
JF  - Chemosensors
N2  - Acetoin and diacetyl have a major impact on the flavor of alcoholic beverages such as wine or beer. Therefore, their measurement is important during the fermentation process. Until now, gas chromatographic techniques have typically been applied; however, these require expensive laboratory equipment and trained staff, and do not allow for online monitoring. In this work, a capacitive electrolyte–insulator–semiconductor sensor modified with tobacco mosaic virus (TMV) particles as enzyme nanocarriers for the detection of acetoin and diacetyl is presented. The enzyme acetoin reductase from Alkalihalobacillus clausii DSM 8716ᵀ is immobilized via biotin–streptavidin affinity, binding to the surface of the TMV particles. The TMV-assisted biosensor is electrochemically characterized by means of leakage–current, capacitance–voltage, and constant capacitance measurements. In this paper, the novel biosensor is studied regarding its sensitivity and long-term stability in buffer solution. Moreover, the TMV-assisted capacitive field-effect sensor is applied for the detection of diacetyl for the first time. The measurement of acetoin and diacetyl with the same sensor setup is demonstrated. Finally, the successive detection of acetoin and diacetyl in buffer and in diluted beer is studied by tuning the sensitivity of the biosensor using the pH value of the measurement solution.
Y1  - 2022
U6  - http://dx.doi.org/10.3390/chemosensors10060218
SN  - 2227-9040
N1  - This article belongs to the Special Issue "Nanostructured Devices for Biochemical Sensing"
VL  - 10
IS  - 6
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Welden, Melanie
A1  - Poghossian, Arshak
A1  - Vahidpour, Farnoosh
A1  - Wendlandt, Tim
A1  - Keusgen, Michael
A1  - Wege, Christina
A1  - Schöning, Michael Josef
T1  - Towards multi-analyte detection with field-effect capacitors modified with tobacco mosaic virus bioparticles as enzyme nanocarriers
JF  - Biosensors
N2  - Utilizing an appropriate enzyme immobilization strategy is crucial for designing enzyme-based biosensors. Plant virus-like particles represent ideal nanoscaffolds for an extremely dense and precise immobilization of enzymes, due to their regular shape, high surface-to-volume ratio and high density of surface binding sites. In the present work, tobacco mosaic virus (TMV) particles were applied for the co-immobilization of penicillinase and urease onto the gate surface of a field-effect electrolyte-insulator-semiconductor capacitor (EISCAP) with a p-Si-SiO₂-Ta₂O₅ layer structure for the sequential detection of penicillin and urea. The TMV-assisted bi-enzyme EISCAP biosensor exhibited a high urea and penicillin sensitivity of 54 and 85 mV/dec, respectively, in the concentration range of 0.1–3 mM. For comparison, the characteristics of single-enzyme EISCAP biosensors modified with TMV particles immobilized with either penicillinase or urease were also investigated. The surface morphology of the TMV-modified Ta₂O₅-gate was analyzed by scanning electron microscopy. Additionally, the bi-enzyme EISCAP was applied to mimic an XOR (Exclusive OR) enzyme logic gate.
KW  - urease
KW  - enzyme-logic gate
KW  - bi-enzyme biosensor
KW  - capacitive field-effect sensor
KW  - tobacco mosaic virus (TMV)
KW  - penicillinase
Y1  - 2022
U6  - http://dx.doi.org/10.3390/bios12010043
SN  - 2079-6374
N1  - This article belongs to the Special Issue "Biosensors: 10th Anniversary Feature Papers"
VL  - 12
IS  - 1
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Warmer, Johannes
A1  - Wagner, Patrick
A1  - Schöning, Michael Josef
A1  - Kaul, Peter
T1  - Detection of triacetone triperoxide using temperature cycled metal-oxide semiconductor gas sensors
JF  - Physica status solidi (a)
Y1  - 2015
U6  - http://dx.doi.org/10.1002/pssa.201431882
SN  - 1862-6319
VL  - 212
IS  - 6
SP  - 1289
EP  - 1298
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Wang, J.
A1  - Krause, R.
A1  - Block, K.
A1  - Musameh, M.
A1  - Mulchandani, A.
A1  - Schöning, Michael Josef
T1  - Flow injection amperometric detection of OP nerve agents based on organophosphorus-hydrolase biosensor detector
JF  - Biosensors & Bioelectronics. 18 (2003), H. 2-3
Y1  - 2003
SN  - 0956-5663
SP  - 255
EP  - 260
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Yoshinobu, T.
A1  - Rao, C.
A1  - Otto, R.
A1  - Schöning, Michael Josef
T1  - „All-in-one“ solid-state device based on a lightaddressable potentiometric sensor platform
JF  - Transducers '05 : the 13th International Conference on Solid-State Sensors, Actuators and Microsystems ; Seoul, Korea, [June 5 - 9, 2005] ; digest of technical papers / sponsored by Korean Sensors Society. Technical co-sponsors: IEEE Electron Devices Society
Y1  - 2005
SN  - 0-7803-83995-6
N1  - International Conference on Solid State Sensors, Actuators and Microsystems ; (13, 2005, Seoul)
SP  - 1872
EP  - 1875
PB  - IEEE Operations Center
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Werner, Frederik
A1  - Miyamoto, Ko-Ichiro
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - Development and characterisation of a compact light-addressable potentiometric sensor (LAPS) based on the digital light processing (DLP) technology for flexible chemical imaging
JF  - Sensors and Actuators B: Chemical
N2  - Chemical imaging systems allow the visualisation of the distribution of chemical species on the sensor surface. This work represents a new flexible approach to read out light-addressable potentiometric sensors (LAPS) with the help of a digital light processing (DLP) set-up. The DLP, known well for video projectors, consists of a mirror-array MEMS device, which allows fast and flexible generation of light patterns. With the help of these light patterns, the sensor surface of the LAPS device can be addressed. The DLP approach has several advantages compared to conventional LAPS set-ups, e.g., the spot size and the shape of the light pointer can be changed easily and no mechanical movement is necessary, which reduces the size of the set-up and increases the stability and speed of the measurement. In addition, the modulation frequency and intensity of the light beam are important parameters of the LAPS set-up. Within this work, the authors will discuss two different ways of light modulation by the DLP set-up, investigate the influence of different modulation frequencies and different light intensities as well as demonstrate the scanning capabilities of the new set-up by pH mapping on the sensor surface.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.snb.2010.12.003
SN  - 0925-4005
N1  - Part of special issue "Eurosensors XXIV, 2010"
VL  - 170
SP  - 34
EP  - 39
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Werner, Frederik
A1  - Miyamoto, Ko-Ichiro
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - A high-density multi-point LAPS set-up using a VCSEL array and FPGA control
JF  - Sensors and Actuators B: Chemical. 154 (2011), H. 2
Y1  - 2011
SN  - 1873-3077
N1  - EUROSENSORS XXIII
SP  - 124
EP  - 128
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Werner, Frederik
A1  - Miyamoto, Ko-ichiro
A1  - Ackermann, Hans-Josef
A1  - Yoshinobu, Tatsuo
A1  - Schöning, Michael Josef
T1  - FPGA-based LAPS device for the flexible design of sensing sites on functional interfaces
JF  - Physica Status Solidi (A). 207 (2010), H. 4
Y1  - 2010
SN  - 1862-6300
N1  - Special Issue: Engineering of Functional Interfaces EnFI 2009
SP  - 844
EP  - 849
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Werner, Frederik
A1  - Miyamoto, K.
A1  - Schöning, Michael Josef
A1  - Yoshinobu, T.
T1  - A high-density multi-point LAPS set-up using a VCSEL array and FPGA control
JF  - Procedia Chemistry. 1 (2009), H. 1
Y1  - 2009
SN  - 1876-6196
N1  - Proceedings of the Eurosensors XXIII conference ; Eurosensors 23
SP  - 1483
EP  - 1486
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Vornholt, Wolfgang
A1  - Werner, Frederik
A1  - Yoshinobu, Tatsuo
A1  - Miyamoto, Ko-Ichiro
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Light-addressable potentiometric sensor (LAPS) combined with magnetic beads for pharmaceutical screening
JF  - Physics in medicine
N2  - The light-addressable potentiometric sensor (LAPS) has the unique feature to address different regions of a sensor surface without the need of complex structures. Measurements at different locations on the sensor surface can be performed in a common analyte solution, which distinctly simplifies the fluidic set-up. However, the measurement in a single analyte chamber prevents the application of different drugs or different concentrations of a drug to each measurement spot at the same time as in the case of multi-reservoir-based set-ups. In this work, the authors designed a LAPS-based set-up for cell culture screening that utilises magnetic beads loaded with the endotoxin (lipopolysaccharides, LPS), to generate a spatially distributed gradient of analyte concentration. Different external magnetic fields can be adjusted to move the magnetic beads loaded with a specific drug within the measurement cell. By recording the metabolic activities of a cell layer cultured on top of the LAPS surface, this work shows the possibility to apply different concentrations of a sample along the LAPS measurement spots within a common analyte solution.
Y1  - 2016
U6  - http://dx.doi.org/10.1016/j.phmed.2016.03.001
SN  - 2352-4510
VL  - 2016
IS  - 1
SP  - 2
EP  - 7
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Shigiahara, N.
A1  - Miyamoto, K.
A1  - Suzurikawa, J.
A1  - Finger, F.
A1  - Schöning, Michael Josef
A1  - Yoshinobu, T.
T1  - Light-addressable Potentiometric Sensors and Light–addressable Electrodes as a Combined Sensor-and-manipulator Microsystem with High Flexibility
JF  - Procedia Engineering
N2  - This work describes the novel combination of the light-addressable electrode (LAE) and the light-addressable potentiometric sensor (LAPS) into a microsystem set-up. Both the LAE as well as the LAPS shares the principle of addressing the active spot by means of a light beam. This enables both systems to manipulate resp. to detect an analyte with a high spatial resolution. Hence, combining both principles into a single set-up enables the active stimulation e.g., by means of electrolysis and a simultaneous observation e.g., the response of an entrapped biological cell by detection of extracellular pH changes. The work will describe the principles of both technologies and the necessary steps to integrate them into a single set-up. Furthermore, examples of application and operation of such systems will be presented.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.proeng.2012.09.290
SN  - 1877-7058
N1  - Part of special issue "26th European Conference on Solid-State Transducers, EUROSENSOR 2012"
IS  - 47
SP  - 890
EP  - 893
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
A1  - Otto, R.
A1  - Yoshinobu, T.
T1  - A handheld 16 channel pen-type LAPS as a platform for (bio-)electrochemical sensing
JF  - Biomedizinische Technik. 49 (2004), H. 2
Y1  - 2004
SN  - 0932-4666
SP  - 996
EP  - 997
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
T1  - Light-addressable potentiometric sensors (LAPS): recent trends and applications
JF  - Electrochemical sensor analysis / edited by S. Alegret ...
Y1  - 2007
SN  - 978-0-444-53053-0
N1  - Wilson & Wilson's comprehensive analytical chemistry ; 49
SP  - 87
EP  - 128
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Rao, C.
A1  - Otto, R.
A1  - Yoshinobu, T.
A1  - Kloock, Joachim P.
A1  - Schöning, Michael Josef
T1  - Chipkarten-basierter Multikanal lichtadressierbarer potentiometrischer Sensor für analytische Anwendungen in flüssigen Medien
JF  - Neue Herausforderungen und Anwendungen in der Sensortechnik : 7. Dresdner Sensor-Symposium ; 12. - 14. Dezember 2005, Dresden / [Forschungsgesellschaft für Messtechnik, Sensorik und Medizintechnik e.V.]. Gerald Gerlach ... (Hg.)
Y1  - 2005
SN  - 3-938863-29-3
N1  - Dresdner Beiträge zur Sensorik ; 24
SP  - 11
EP  - 14
PB  - TUDpress
CY  - Dresden
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Rao, C.
A1  - Kloock, Joachim P.
A1  - Yoshinobu, T.
A1  - Otto, R.
A1  - Keusgen, M.
A1  - Schöning, Michael Josef
T1  - “LAPS Card”—A novel chip card-based light-addressable potentiometric sensor (LAPS)
JF  - Sensors and Actuators B: Chemical. 118 (2006), H. 1-2
Y1  - 2006
SN  - 0925-4005
N1  - Eurosensors XIX - Eurosensors XIX - The 19th European Conference on Solid-State Transducers
SP  - 33
EP  - 40
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Molina, Roberto
A1  - Yoshinobu, Tatsuo
A1  - Kloock, Joachim P.
A1  - Biselli, Manfred
A1  - Canzoneri, Michele
A1  - Schnitzler, Thomas
A1  - Schöning, Michael Josef
T1  - Handheld multi-channel LAPS device as a transducer platform for possible biological and chemical multi-sensor applications
JF  - Electrochimica Acta. 53 (2007), H. 2
Y1  - 2007
SN  - 0013-4686
SP  - 305
EP  - 311
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Molina, R.
A1  - Biselli, Manfred
A1  - Canzoneri, Michele
A1  - Schnitzler, Thomas
A1  - Yoshinobu, Tatsuo
A1  - Schöning, Michael Josef
T1  - A light-addressable potentiometric sensor system for fast, simultaneous and spatial detection of the metabolic activity of biological cells
JF  - Transducers '07 Eurosensors XXI : digest of technical papers ; the14th International Conference on Solid-State Sensors, Actuators and Microsystems, June 10-14, 2007, Lyon, France / Gilles Delapierre (Ed.)
Y1  - 2007
SN  - 1-4244-0841-5
N1  - Eurosensors 21, 2007, Lyon ; International Conference on Solid-State Sensors, Actuators and Microsystems 14, 2007, Lyon
SP  - 1107
EP  - 1110
PB  - IEEE
CY  - Piscataway
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Miyamoto, Ko-ichiro
A1  - Shigihara, Noriko
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - Microfluidic systems with free definable sensor spots by an integrated light-addressable potentiometric sensor
JF  - Procedia Engineering. 25 (2011)
Y1  - 2011
SN  - 1877-7058
N1  - EurosensorsXXV ; Proc. Eurosensors XXV, September 4-7, 2011, Athens, Greece
SP  - 791
EP  - 794
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Miyamoto, Ko-ichiro
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - Novel combination of digital light processing (DLP) and light-addressable potentiometric sensors (LAPS) for flexible chemical imaging
JF  - Procedia Engineering. 5 (2010)
Y1  - 2010
SN  - 1877-7058
N1  - Eurosensor XXIV Conference
SP  - 520
EP  - 523
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Miyamoto, K.
A1  - Werner, Frederik
A1  - Schöning, Michael Josef
A1  - Yoshinobu, T.
T1  - Flexible electrochemical imaging with “zoom-in” functionality by using a new type of light-addressable potentiometric sensor
Y1  - 2011
N1  - 2011 16th International Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS) , Date: 5-9 June 2011
SP  - 2133
EP  - 2135
PB  - IEEE
CY  - New York
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Maris, Rob J.
A1  - Ackermann, Hans-Josef
A1  - Otto, Ralph
A1  - Beging, Stefan
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
T1  - Handheld measurement device for field-effect sensor structures: Practical evaluation and limitations
JF  - Sensors and Actuators B: Chemical  . 127 (2007), H. 1
Y1  - 2007
SN  - 0925-4005
SP  - 217
EP  - 223
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Kloock, Joachim P.
A1  - Schöning, Michael Josef
T1  - Determination of cadmium concentration and pH value in aqueous solutions by means of a handheld light-addressable potentiometric sensor (LAPS) device
JF  - Electrochemical sensor analysis / edited by S. Alegret ...
Y1  - 2007
SN  - 978-0-444-53133-9
N1  - Wilson & Wilson's comprehensive analytical chemistry ; 49
SP  - e35
EP  - e44
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wagner, Torsten
A1  - Beging, Stefan
A1  - Rotter, L.
A1  - Poghossian, Arshak
A1  - Biselli, Manfred
A1  - Zang, Werner
A1  - Schöning, Michael Josef
T1  - Online-Messsysteme für die automatisierte Charakterisierung von feldeffektbasierten Biosensoren
JF  - 8. Dresdner Sensor-Symposium : Sensoren für Umwelt, Klima und Sicherheit, Biosensoren und Biosysteme, Sensoren und Sensorsysteme für die Prozesstechnik, Trends in der Sensortechnik, Materialentwicklung für die Sensorik; 8. Dresdner Sensor-Symposium, 10. - 12. Dezember 2007, Dresden / Gerald Gerlach ... (Hg.)
Y1  - 2007
SN  - 978-3-940046-45-1
N1  - Dresdner Sensor-Symposium <8, 2007, Dresden> ; Dresdner Beiträge zur Sensorik ; 29
SP  - 257
EP  - 260
PB  - TUDpress, Verl. der Wissenschaften
CY  - Dresden
ER  - 
TY  - JOUR
A1  - Wagner, Patrick
A1  - Doll, Theodor
A1  - Schöning, Michael Josef
T1  - Engineering of functional interfaces / Patrick Wagner ; Theodor Doll ; Michael J. Schöning (eds.)
JF  - Physica status solidi (A) : Applications and materials science
Y1  - 2014
U6  - http://dx.doi.org/10.1002/pssa.201470241
SN  - 1521-396X (E-Book); 1862-6319 (E-Book); 0031-8965 (Print); 1862-6300 (Print)
VL  - 211
IS  - 6
SP  - 1339
EP  - 1339
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Voigt, Birgit
A1  - Schroeter, Rebecca
A1  - Jürgen, Britta
A1  - Albrecht, Dirk
A1  - Evers, Stefan
A1  - Bongaerts, Johannes
A1  - Maurer, Karl-Heinz
A1  - Schweder, Thomas
A1  - Hecker, Michael
T1  - The response of Bacillus licheniformis to heat and ethanol stress and the role of the SigB regulon
JF  - Proteomics
Y1  - 2013
SN  - 1615-9861 (E-Journal); 1615-9853 (Print)
VL  - Vol. 13
IS  - Iss. 14
SP  - 2140
EP  - 2146
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Voigt, Birgit
A1  - Albrecht, Dirk
A1  - Sievers, Susanne
A1  - Becher, Dörte
A1  - Bongaerts, Johannes
A1  - Evers, Stefan
A1  - Schweder, Thomas
A1  - Maurer, Karl-Heinz
A1  - Hecker, Michael
T1  - High-resolution proteome maps of Bacillus licheniformis cells growing in minimal medium
JF  - Proteomics
Y1  - 2015
U6  - http://dx.doi.org/10.1002/pmic.201400504
SN  - 1615-9861
VL  - 15
IS  - 15
SP  - 2629
EP  - 2633
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Vlasov, Y. G.
A1  - Mourzina, Y. G.
A1  - Legin, A. V.
A1  - Ermelenko, Y. E.
A1  - Schubert, J.
A1  - Schöning, Michael Josef
A1  - Lüth, H.
T1  - Solid-state thin film sensors based on chalcogenide materials prepared by planar technology and pulsed laser deposition
JF  - Russian Journal of Applied Chemistry. 75 (2002), H. 3
Y1  - 2002
SN  - 1070-4272
SP  - 351
EP  - 356
ER  - 
TY  - JOUR
A1  - Vitusevich, S. A.
A1  - Förster, Arnold
A1  - Reetz, W.
A1  - Lüth, H.
A1  - Belyaev, A. E.
A1  - Danylyuk, S. V.
T1  - Spectral Responsivity of single-quantum-well photodetectors
JF  - Applied Physics Letters. 77 (2000), H. 1
Y1  - 2000
SN  - 1077-3118
SP  - 16
EP  - 18
ER  - 
TY  - JOUR
A1  - Vitusevich, S. A.
A1  - Förster, Arnold
A1  - Reetz, W.
A1  - Lüth, H.
A1  - Belyaev, A. E.
A1  - Danylyuk, S. V.
T1  - Fine structure of photoresponse spectra in a double-barrier resonant tunnelling diode
JF  - Nanotechnology. 11 (2000), H. 4
Y1  - 2000
SN  - 1361-6528
SP  - 305
EP  - 308
ER  - 
TY  - JOUR
A1  - Vitusevich, S. A.
A1  - Förster, Arnold
A1  - Lüth, H.
A1  - Belyaev, A. E.
A1  - Danylyuk, S. V.
A1  - Konakova, R. V.
A1  - Sheka, D. I.
T1  - Resonant spectroscopy of electric-field-induced superlattices
JF  - Journal of Applied Physics. 90 (2001), H. 6
Y1  - 2001
SN  - 1089-7550
U6  - http://dx.doi.org/10.1063/1.1392956
SP  - 2857
EP  - 2861
ER  - 
TY  - JOUR
A1  - Vitusevich, S. A.
A1  - Förster, Arnold
A1  - Indlekofer, K.-M.
A1  - Lüth, H.
A1  - Belyaev, A. E.
A1  - Glavin, B. A.
A1  - Konakova, R. V.
T1  - Tunneling Through X-Valley-Related Impurity States in GaAs/AlAs Resonant-Tunneling Diodes
JF  - Physical  Review . B. 61 (2000), H. 16
Y1  - 2000
SN  - 1550-235X
SP  - 10898
EP  - 10904
ER  -