@article{Willms1993,
  author    = {Willms, Herbert},
  title     = {Regelung eines H2/O2-Dampferzeugers mit Hilfe eines modifizierten Zirkondioxid-Sensors},
  series = {Chemie Ingenieur Technik},
  volume    = {65},
  journal   = {Chemie Ingenieur Technik},
  number    = {8},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  isbn      = {0009-286X},
  pages     = {954 -- 956},
  year      = {1993},
  language  = {de}
}
@article{HagemannGudatKunz1976,
  author    = {Hagemann, Hans-J{\"u}rgen and Gudat, W. and Kunz, C.},
  title     = {Photoabsorption coefficient of alloys of Al with transition metals V, Fe, Ni and Cu and Pr from 30 to 150 eV photon energy},
  series = {Physica status solidi b},
  volume    = {74},
  journal   = {Physica status solidi b},
  number    = {2},
  publisher = {Wiley-VCH},
  address   = {Berlin},
  isbn      = {0031-8957},
  doi       = {10.1002/pssb.2220740211},
  pages     = {507 -- 521},
  year      = {1976},
  abstract  = {The absorption coefficient of VAI3, FeAI, NiAI, NiAl2, CuAI2, PrAl2, and of disordered V-AI (16 at\% AI, 28\%, 41\%) and Fe-AI (11\%) alloys has been measured in the region of the M₂,₃ absorption of the transition metals and the Labsorption of AI. The strong changes of the AI spectrum in the region of the 100 eV maximum upon alloying are explained as another evidence of the EXAFS (extended X-ray absorption fine structure) nature of these structures. The broad, prominent absorption peaks from the 3p excitations in V and Fe and from the 4d excitations in Pr are influenced only little on allyoing and thus appear to be of atomic origin. The fine structure at the onset of the Pr 4d transitions is identical in the metal and the alloy but differs from that of Pr oxide. The only M₂,₃ edge which is detectably shifted is that of Ni (up to 2.1 eV), whereas the onset of the AI L₂,₃ edge is shifted in all the alloys (up to 1.1 eV). The shifts are interpreted in accordance with X-ray fluorescence and nuclear resonance measurements as changes of the density of states in the valence band of the alloys.},
  language  = {en}
}
@article{MuribTranCeunincketal.2012,
  author    = {Murib, Mohammed S. and Tran, Anh Quang and Ceuninck, Ward de and Sch{\"o}ning, Michael Josef and Nesladek, Milos and Serpeng{\"u}zel, Ali and Wagner, Patrick},
  title     = {Analysis of an optical biosensor based on elastic light scattering from diamond-, glass-, and sapphire microspheres},
  series = {Physica Status Solidi A},
  volume    = {209},
  journal   = {Physica Status Solidi A},
  number    = {9},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1862-6319},
  doi       = {10.1002/pssa.201100795},
  pages     = {1804 -- 1810},
  year      = {2012},
  abstract  = {Deoxyribonucleic acid (DNA) and protein recognition are now standard tools in biology. In addition, the special optical properties of microsphere resonators expressed by the high quality factor (Q-factor) of whispering gallery modes (WGMs) or morphology dependent resonances (MDRs) have attracted the attention of the biophotonic community. Microsphere-based biosensors are considered as powerful candidates to achieve label-free recognition of single molecules due to the high sensitivity of their WGMs. When the microsphere surface is modified with biomolecules, the effective refractive index and the effective size of the microsphere change resulting in a resonant wavelength shift. The transverse electric (TE) and the transverse magnetic (TM) elastic light scattering intensity of electromagnetic waves at 600 and 1400 nm are numerically calculated for DNA and unspecific binding of proteins to the microsphere surface. The effect of changing the optical properties was studied for diamond (refractive index 2.34), glass (refractive index 1.50), and sapphire (refractive index 1.75) microspheres with a 50 µm radius. The mode spacing, the linewidth of WGMs, and the shift of resonant wavelength due to the change in radius and refractive index, were analyzed by numerical simulations. Preliminary results of unspecific binding of biomolecules are presented. The calculated shift in WGMs can be used for biomolecules detection.},
  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{SpelthahnKirsanovLeginetal.2012,
  author    = {Spelthahn, Heiko and Kirsanov, Dmitry and Legin, Andrey and Osterrath, Thomas and Schubert, J{\"u}rgen and Zander, Willi and Sch{\"o}ning, Michael Josef},
  title     = {Development of a thin-film sensor array for analytical monitoring of heavy metals in aqueous solutions},
  series = {Physica Status Solidi (a)},
  volume    = {209},
  journal   = {Physica Status Solidi (a)},
  number    = {5},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  isbn      = {1862-6319},
  doi       = {10.1002/pssa.201100733},
  pages     = {885 -- 891},
  year      = {2012},
  abstract  = {In industrial processes there is a variety of heavy metals (e.g., copper, zinc, cadmium, and lead) in use for wires, coatings, paints, alloys, batteries, etc. Since the application of these transition metals for industry is inevitable, it is a vital task to develop proper analytical techniques for their monitoring at low activity levels, especially because most of these elements are acutely toxic for biological organisms. The determination of ions in solution by means of a simple and inexpensive sensor array is, therefore, a promising task. In this work, a sensor array with heavy metal-sensitive chalcogenide glass membranes for the simultaneous detection of the four ions Ag⁺, Cu2⁺, Cd2⁺, and Pb2⁺ in solution is realized. The results of the physical characterization by means of microscopy, profilometry, Rutherford backscattering spectroscopy (RBS), and scanning electron microscopy (SEM) as well as the electrochemical characterization by means of potentiometric measurements are presented. Additionally, the possibility to expand the sensor array by polymeric sensor membranes is discussed.},
  language  = {en}
}
@article{SpelthahnSchubertSchoening2012,
  author    = {Spelthahn, Heiko and Schubert, J{\"u}rgen and Sch{\"o}ning, Michael Josef},
  title     = {D{\"u}nnschichtsensoren f{\"u}r die Schwermetallanalytik},
  series = {GIT : Labor-Fachzeitschrift},
  volume    = {56},
  journal   = {GIT : Labor-Fachzeitschrift},
  number    = {4},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {0016-3538},
  pages     = {285 -- 287},
  year      = {2012},
  abstract  = {Die Detektion von Schadstoffen repr{\"a}sentiert in der Umweltanalytik eine wichtige Aufgabenstellung. Gerade die Abwasser- bzw. Brauchwasseranalytik sowie die Prozesskontrolle haben einen hohen Stellenwert. Siliziumbasierte D{\"u}nnschichtsensoren bieten eine kosteng{\"u}nstige M{\"o}glichkeit, „online"-Messungen bzw. Vor-Ort-Messungen zeitnah durchzuf{\"u}hren. In dieser Arbeit wird ein potentiometrisches Sensorarray auf der Basis von Chalkogenidgl{\"a}sern zur Detektion von Schwermetallen in w{\"a}ssrigen Medien vorgestellt.},
  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{KirchnerReisertPuetzetal.2012,
  author    = {Kirchner, Patrick and Reisert, Steffen and P{\"u}tz, Patrick and Keusgen, Michael and Sch{\"o}ning, Michael Josef},
  title     = {Characterisation of polymeric materials as passivation layer for calorimetric H2O2 gas sensors},
  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.201100773},
  pages     = {859 -- 863},
  year      = {2012},
  abstract  = {Calorimetric gas sensors for monitoring the H₂O₂ concentration at elevated temperatures in industrial sterilisation processes have been presented in previous works. These sensors are built up in form of a differential set-up of a catalytically active and passive temperature-sensitive structure. Although, various types of catalytically active dispersions have been studied, the passivation layer has to be established and therefore, chemically as well as physically characterised. In the present work, fluorinated ethylene propylene (FEP), perfluoralkoxy (PFA) and epoxy-based SU-8 photoresist as temperature-stable polymeric materials have been investigated for sensor passivation in terms of their chemical inertness against H₂O₂, their hygroscopic properties as well as their morphology. The polymeric materials were deposited via spin-coating on the temperature-sensitive structure, wherein spin-coated FEP and PFA show slight agglomerates. However, they possess a low absorption of humidity due to their hydrophobic surface, whereas the SU-8 layer has a closed surface but shows a slightly higher absorption of water. All of them were inert against gaseous H₂O₂ during the characterisation in H₂O₂ atmosphere that demonstrates their suitability as passivation layer for calorimetric H₂O₂ gas sensors.},
  language  = {en}
}
@article{Grueters1975,
  author    = {Gr{\"u}ters, Hugo},
  title     = {Isotrope, homogene L{\"o}sung des anisotropen, inhomogenen Plattenproblems},
  series = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik : ZAMM},
  volume    = {55},
  journal   = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik : ZAMM},
  number    = {4 (Special Issue)},
  publisher = {Wiley-VCH},
  address   = {Berlin},
  issn      = {0044-2267},
  doi       = {10.1002/zamm.19750550405},
  pages     = {T91 -- T93},
  year      = {1975},
  language  = {de}
}
@article{Grueters1974,
  author    = {Gr{\"u}ters, Hugo},
  title     = {Iterative L{\"o}sung von Lastspannungsproblemen in anisotropen K{\"o}rpern},
  series = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik : ZAMM},
  volume    = {54},
  journal   = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik : ZAMM},
  number    = {12},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  isbn      = {0044-2267},
  doi       = {10.1002/zamm.19740541230},
  pages     = {T79 -- T80},
  year      = {1974},
  language  = {de}
}