TY  - JOUR
A1  - Schusser, Sebastian
A1  - Leinhos, Marcel
A1  - Bäcker, Matthias
A1  - Poghossian, Arshak
A1  - Wagner, Patrick
A1  - Schöning, Michael Josef
T1  - Impedance spectroscopy: A tool for real-time in situ monitoring of the degradation of biopolymers
JF  - Physica Status Solidi (A)
N2  - Investigation of the degradation kinetics of biodegradable polymers is essential for the development of implantable biomedical devices with predicted biodegradability. In this work, an impedimetric sensor has been applied for real-time and in situ monitoring of degradation processes of biopolymers. The sensor consists of two platinum thin-film electrodes covered by a polymer film to be studied. The benchmark biomedical polymer poly(D,L-lactic acid) (PDLLA) was used as a model system. PDLLA films were deposited on the sensor structure from a polymer solution by using the spin-coating method. The degradation kinetics of PDLLA films have been studied in alkaline solutions of pH 9 and 12 by means of an impedance spectroscopy (IS) method. Any changes in a polymer capacitance/resistance induced by water uptake and/or polymer degradation will modulate the global impedance of the polymer-covered sensor that can be used as an indicator of the polymer degradation. The degradation rate can be evaluated from the time-dependent impedance spectra. As expected, a faster degradation has been observed for PDLLA films exposed to pH 12 solution.
Y1  - 2013
U6  - https://doi.org/10.1002/pssa.201200941
SN  - 1521-396X ; 0031-8965
VL  - 210
IS  - 5
SP  - 905
EP  - 910
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Butenweg, Christoph
A1  - Kleemann, Anne
A1  - Ikier, Axel
T1  - Impact-Belastungen von Stahlbetonkonstruktionen
JF  - Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen ; offizielle Zeitschrift der VDI-Gesellschaft Bautechnik. Beilage: D-A-CH-Mitteilungsblatt
Y1  - 2013
SN  - 0005-6650
N1  - Printausgabe in der Bibliothek Bayernallee vorhanden: 13 Z 049-2013
VL  - Band 88
SP  - S7
EP  - S14
PB  - VDI Verlag
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Kirsch, Hans-Jürgen
A1  - Bassen, Yasmine
T1  - IGW RS HFA 21 : konzeptionelle Lösung oder Einzelfall? ; Erfolg bei Spenden sammelnden Organisationen ; eine bilanztheoretische Untersuchung
T2  - Jahrbuch für Controlling und Rechnungswesen. Vol. 29
Y1  - 2013
SP  - 355
EP  - 369
PB  - LexisNexis, ARD Orac
CY  - Wien
ER  - 
TY  - BOOK
A1  - Hoever, Georg
T1  - Höhere Mathematik kompakt
KW  - Mathematik
Y1  - 2013
SN  - 978-3-642-30334-0
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Becker, Jörg
A1  - Eggert, Mathias
A1  - Fleischer, Stefan
A1  - Knackstedt, Ralf
T1  - How to Teach Regulatory Compliant Data Warehouse Engineering?
T2  - Proceedings of the Nineteenth Americas Conference on Information Systems, Chicago, Illinois, August 15-17, 2013.
Y1  - 2013
N1  - AMCIS 2013 Proceedings
ER  - 
TY  - JOUR
A1  - Görgens, Stefan
A1  - Greubel, Steffen
A1  - Moosdorf, Andreas
T1  - How to mobilize 20,000 people: Perspectives on retail and consumer goods
Y1  - 2013
SP  - 52
EP  - 58
ER  - 
TY  - CHAP
A1  - Ritz, Thomas
A1  - Wallenborn, Ramona
ED  - Boll-Westermann, Susanne
T1  - HMI mobiler Apps zur Organisation multimodaler Mobilität
T2  - Mensch & Computer 2013 - Workshopband : 13. fachübergreifende Konferenz für interaktive und kooperative Medien
Y1  - 2013
SN  - 978-3-486-77855-7 (Print)
SN  - 978-3-486-78123-6 (E-Book)
U6  - https://doi.org/10.1524/9783486781236
SP  - 103
EP  - 109
PB  - Oldenbourg
CY  - München
ER  - 
TY  - JOUR
A1  - Itabashi, Akinori
A1  - Kosaka, Naoki
A1  - Miyamoto, Ko-ichiro
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
T1  - High-speed chemical imaging system based on front-side-illuminated LAPS
JF  - Sensors and actuators B: Chemical
N2  - 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.
Y1  - 2013
U6  - https://doi.org/10.1016/j.snb.2013.03.016
SN  - 1873-3077
VL  - 182
SP  - 315
EP  - 321
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - RPRT
A1  - Hoffschmidt, Bernhard
T1  - HelioScan : Machbarkeitsstudie zur Entwicklung einer radargestützten Positionsregelung von Heliostatenfeldern für Solarturmkraftwerke : Schlussbericht : Laufzeit: 01.07.2010 - 31.12.2012 : Förderkennzeichen 325234A
Y1  - 2013
PB  - Bundesministerium für Umwelt, Naturschutz und Reaktorsicherheit
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Dobbertin, Matthias
A1  - Rigling, Andreas
T1  - Growth response of Scots pine with different crown transparency status to drought release
JF  - Annals of Forest Science
Y1  - 2013
U6  - https://doi.org/10.1007/s13595-013-0310-z
SN  - 1286-4560 (Print)
SN  - 1297-966X (Online)
VL  - 70
IS  - 7
SP  - 685
EP  - 693
PB  - Springer
CY  - Cham
ER  -