TY  - JOUR
A1  - Reisert, Steffen
A1  - Schneider, Benno
A1  - Geissler, Hanno
A1  - Gompel, Matthias van
A1  - Wagner, Patrick
A1  - Schöning, Michael Josef
T1  - Multi-sensor chip for the investigation of different types of metal oxides for the detection of H2O2 in the ppm range
JF  - physica status solidi (a)
N2  - In this work, a multi-sensor chip for the investigation of the sensing properties of different types of metal oxides towards hydrogen peroxide in the ppm range is presented. The fabrication process and physical characterization of the multi-sensor chip are described. Pure SnO2 and WO3 as well as Pd- and Pt-doped SnO2 films are characterized in terms of their sensitivity to H2O2. The sensing films have been prepared by drop-coating of water-dispensed nano-powders. A physical characterization, including scanning electron microscopy and X-ray diffraction analysis of the deposited metal-oxide films, was done. From the measurements in hydrogen peroxide atmosphere, it could be shown, that all of the tested metal oxide films are suitable for the detection of H2O2 in the ppm range. The highest sensitivity and reproducibility was achieved using Pt-doped SnO2.

Calibration plot of a SnO2, WO3, Pt-, and Pd-doped SnO2 gas sensor for H2O2 concentrations in the ppm range.
Y1  - 2013
SN  - 1862-6319
VL  - 210
IS  - 5
SP  - 898
EP  - 904
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Reisert, Steffen
A1  - Geissler, Hanno
A1  - Flörke, Rudolf
A1  - Weiler, Christian
A1  - Wagner, Patrick
A1  - Schöning, Michael Josef
T1  - Characterisation of aseptic sterilisation processes using an electronic nose
JF  - International journal of nanotechnology
Y1  - 2013
SN  - 1475-7435 (Print) 7141-8151 (Online)
VL  - Vol. 10
IS  - No. 5-7
SP  - 470
EP  - 484
PB  - Inderscience Enterprises
CY  - Genève
ER  - 
TY  - JOUR
A1  - Hennemann, Jörg
A1  - Kohl, Claus-Dieter
A1  - Reisert, Steffen
A1  - Kirchner, Patrick
A1  - Schöning, Michael Josef
T1  - Copper oxide nanofibres for detection of hydrogen peroxide vapour at high concentrations
JF  - physica status solidi (a)
N2  - We present a sensor concept based on copper(II)oxide (CuO) nanofibres for the detection of hydrogen peroxide (H2O2) vapour in the percent per volume (% v/v) range. The fibres were produced by using the electrospinning technique. To avoid water condensation in the pores, the fibres were initially modified by an exposure to H2S to get an enclosed surface. By a thermal treatment at 350 °C the fibres were oxidised back to CuO. Thereby, the visible pores disappear which was verified by SEM analysis. The fibres show a decrease of resistance with increasing H2O2  concentration which is due to the fact that hydrogen peroxide is an oxidising gas and CuO a p-type semiconductor. The sensor shows a change of resistance within the minute range to the exposure until the maximum concentration of 6.9% v/v H2O2. At operating temperatures below 450 °C the corresponding sensor response to a concentration of 4.1% v/v increases. The sensor shows a good reproducibility of the signal at different measurements. CuO seems to be a suitable candidate for the detection of H2O2 vapour at high concentrations.

Resistance behaviour of the sensor under exposure to H2O2 vapours between 2.3 and 6.9% v/v at an operating temperature of 450 °C.
Y1  - 2013
U6  - http://dx.doi.org/10.1002/pssa.201200775
SN  - 1862-6319
VL  - 210
IS  - 5
SP  - 859
EP  - 863
PB  - Wiley
CY  - Weinheim
ER  -