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  - 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  - Wiegand, Sandra
A1  - Voigt, Birgit
A1  - Albrecht, Dirk
A1  - Bongaerts, Johannes
A1  - Evers, Stefan
A1  - Hecker, Michael
A1  - Daniel, Rolf
A1  - Liesegang, Heiko
T1  - Fermentation stage-dependent adaptations of Bacillus licheniformis during enzyme production
JF  - Microbial Cell Factories
Y1  - 2013
U6  - http://dx.doi.org/10.1186/1475-2859-12-120
SN  - 1475-2859
VL  - 12
SP  - 120
PB  - Biomed Central
CY  - London
ER  - 
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  - Wolf, Martin
A1  - Altgen, Jannik
T1  - IT Service Management in der Region Aachen : White Paper
Y1  - 2013
SP  - 1
EP  - 13
ER  - 
TY  - JOUR
A1  - Zhubanova, А.
A1  - Mansurov, Z.A.
A1  - Digel, Ilya
A1  - Saviskaya, I.S.
A1  - Akimbekov, N.Sh.
T1  - Designing of Heterogeneous Nanobiocomposites for Biotechnology
JF  - KazNU Bulletin. Biology series
Y1  - 2013
SN  - 1563-0218
VL  - 59
IS  - No 3/1
SP  - 89
EP  - 93
ER  -