Completed Projects

CO2-Methanation of flue gas (Flue gas methanation, BMWi, 03ET7002A)

CO2-Methanation of flue gas

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17    03046 Cottbus

Cooperation Partner:  
Panta Rhei gGmbH
Konrad-Wachsmann-Allee 17
03046 Cottbus

Vattenfall Europe Generation AG
Herrmann-Löns-Straße 33
03050 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
05 / 2013 - 10 / 2015

Index of advancement:
03ET7002A

Promotional institution:
Federal Ministry for Economic Affairs and Energy (BMWi)

Fe-N-C catalysts (MWFK, EFRE, 80160676)

Investigation on the stability of Fe-N-C catalysts for the polmyer electrolyt membrane fuel cell (MWFK, EFRE, 80160676)

Brief desription (only in German)

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
02 / 2014 - 12 / 2014

Index of advancement:
80160676

Promotional institution:
European Regional Development Fund (ERDF) in the management
of the Ministery for Science, Research and Culture (MWFK)

Promotional programme: "Wissens- und Technologietransfer für Ionnovationen"

Generell Information about "European Regional Development Fund (ERDF)"
www.efre.brandenburg.de

Keywords:
PEM fuel cell, CO2 emmission reduction, catalysis, oxygen reduction reaction (ORR)

CO2-Catalysis (MWFK, EFRE, 80158343)

CO2-Catalysis pilot plant 2 (MWFK, EFRE, 80158343)

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
09 / 2013 - 06 / 2014

Index of advancement:
80158343

Promotional institution:
Europäischer Fond für regionale Entwicklung (EFRE) in the management
of the Ministery for Science, Research and Culture (MWFK)

Promotional programme: "Hochschulinvestitionsprogramm"

Generell Information about "Europäischen Fonds für Regionale Entwicklung"
(European Regional Development Fund -ERDF)
www.efre.brandenburg.de

Keywords:
CO2, emmission reduction, CO2 reduction, catalysis, pilot plant

PE-ALD (BMBF, 03IN2V4A)

Development and conversion of the PE-ALD into a industrial useable method (BMBF, 03IN2V4A)

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Cooperation Partner:
Sentech Instruments GmbH
Schwarzschildstraße 2
12489 Berlin

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
07 / 2012 - 04 / 2014

Index of advancement:
03IN2V4A

Promotional institution:
Bundesministerium für Bildung und Forschung (BMBF)
"Zukunft des Technologietransfers in strukturschwachen Regionen - Modell-Hochschule BTU Cottbus"

Keywords:
Atomic Layer Deposition, Oxynitrides, TiO2, Plasma enhanced ALD

Writing graphene (DFG, SPP 1459, SCHM 745/23)

Writing graphene: Ion-beam modification of thin polymer layers

Brief description
We propose a radically new approach to graphene growth process. In contrast to exfoliation or surface layer reactions we will realize a "horizontal" graphene growth. Similar to carbon nanotubes, the graphene will gradually grow along (ab) plane. A single-monomer layer of polymer will be used as a precursor. The polymer will be converted into graphene layer by low-energy ion irradiation. The ion irradiation will be performed in a specially developed scanning mode. In analogy with zone melting, the ion beam will move gradually along the precursor film initiating graphene growth at the beam border. We expect that this procedure can provide large-area graphene films on different insulating substrates.
Atomic layer deposition of a monomer-thick polyimide films will be developed. Graphene growth will be investigated in-situ by X-ray spectroscopy (XPS, SR-XPS, XAS). Ex-situ, the obtained graphene films will be characterized by different microscopy techniques (STM, AFM, KPFM, PEEM). Electric transport properties of graphene films will be studied in details, including field effect and Hall mobility. PEEM and KPFM of field effect transistor structures will be used to investigate macroscopic homogeneity of our graphene films.

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Cooperation Partner:
Lehrstuhl für Experimentalphysik
Universität Erlangen-Nürnberg
Department of Physics
Erwin-Rommel-Str. 1
D-91058 Erlangen

Project manager:
Prof. Dr. Dieter Schmeißer
Prof. Dr. Paul Müller
Dr. Yuri Koval

Duration:
11 / 2010 - 11 / 2013

Index of advancement:
SCHM 745/23-1

Promotional institution:
Deutsche Forschungsgemeinschaft (DFG)
(DFG-Priority Programme, 1459 - Graphene)

Keywords:
Graphene, Ion Beam Modification, X-Ray Spectroscopy

CO2 Utilization: Carbon Cycling, CO2 catalysis (GeoEnergie: GeoEn II, BMBF, 03G0767B)

CO2 Utilization: Carbon Cycling, CO2 catalysis (GeoEnergie: GeoEn II, BMBF, GeoEn- Homepage of the master project)

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
01 / 2011 - 08 / 2013

Index of advancement:
03G0767B

Fördernde Institution:
Bundesministerium für Bildung und Forschung (BMBF)
Spitzenforschung und Innovation in den Neuen Ländern (homepage)
(Projekt-Homepage)

Keywords:
CO2, emmission reduction, CO2 reduction, catalysis

Advanced research and innovation in the New StatesSpitzenforschung und Innovation in den Neuen Ländern

CO2-Catalysis pilot plant (MWFK, EFRE, 80149806)

CO2-Catalysis pilot plant (MWFK, EFRE, 80149806)

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
10 / 2011 - 06 / 2013

Index of advancement:
80149806

Promotional institution:
Europäischer Fond für regionale Entwicklung (EFRE) in the management
of the Ministery for Science, Research and Culture (MWFK)

Promotional programme: "Wissens- und Technologietransfer für Innovationen"

Generell Information about "Europäischen Fonds für Regionale Entwicklung"
(European Regional Development Fund -ERDF)
www.efre.brandenburg.de

Keywords:
CO2, emmission reduction, CO2 reduction, catalysis, pilot plant (Technikum)

Modular Armor Structur Health Guard (AiF, KF2394107DB0)

Modular Armor Structur Health Guard

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Cooperation Partner:
Lab microelectronic GmbH
Große Heide 17 - 21
32425 Minden

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
01 / 2011 - 12 / 2012

Index of advancement:
KF2394107DB0

Promotional institution:
Bundesministerium für Wirtschaft und Techniologie
AiF

Polyamide layers (MWFK, F 111-02-BTUC/00)

Efficiency Improvement of graphitization of thin polyimide layers (MWFK, F 111-02-BTUC/00)

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
09 / 2010 - 12 / 2011

Index of advancement:
F 111-02-BTUC/00

Promotional institution:
MWFK

Keywords:
Graphene, Ion Beam Modification

SESECA (BMBF, 05KS7IC1)

SESECA: Synchrotron-Electron Spectroscopy for electrochemical Analysis (BMBF, 05KS7IC1)

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
07 / 2007 - 12 / 2010

Index of advancement:
05KS7IC1

Promotional institution:
Bundesministerium für Bildung und Forschung (BMBF)

Keywords:
Near-Edge X-ray Absorption Fine Structure spectroscopy (NEXAFS), X-Ray fluorescence

Semiconductor Technology (MWFK, ESF, 1027795)

Establishment of a post gradual Master study course Physics of Semiconductor Technology

Executor:
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. D. Schmeißer

Duration:
02 / 2008 - 12 / 2010

Index of advancement:
1027795

Promotional institution:
Ministerium für Wissenschaft, Forschung und Kultur des Landes Brandenburg (MWFK)
aus Mitteln des Europäischen Sozialfonds (ESF)
www.esf.brandenburg.de

Keywords:
post gradual, Master study courcs, Monday master

Nano analysis (BMBF, 13N9431)

Nano analytics: NEXAFS Investigations for the calibration and quantification of EF-TEM analytics

Executor: (sub-order)
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
K.-Wachsmann-Allee 17
03046 Cottbus

Cooperation Partner:
AMD / Globalfoundries Dresden
Wilschdorfer Landstraße 101
01109 Dresden

Project manager: (sub-order)
Prof. Dr. Dieter Schmeißer

Duration:
07 / 2007 - 06 / 2010

Index of advancement:
13N9431

Promotional institution:
Bundesministerium für Bildung und Forschung (BMBF)

Keywords:
Near-Edge X-ray Absorption Fine Structure spectroscopy (NEXAFS)

Pr-O-N-Layers (DFG, SPP 1157 SCHM 745/9)

Pr-O-N-Layers: Dielectrics for 4H- and 3C-SiC surfaces

Brief description:
Rare-Earth-Hetero-Oxides (Praseodymiumoxide/Oxinitride) are grown on 4H- and 3C-SiC surfaces and their interface characteristics are optimised for electronic applications.
SiC possesses intrinsic characteristics which seems to be suitable to be semiconductor material for high frequency electronics, power devices or high-temperature devices (sensors). Up to now SiC device development is impeded because "native" oxides on SiC do not form ideal interfaces and so there is a high density of interface states observed by xps and electrical measurements. If it is possible to find suitable dielectrics with useful interface properties SiC can be used for applications requiring electronic characteristics like high saturation velocity or high breakdown field strength as well as chemical and mechanical stability.
By using a functional Hetero-Oxide the interface characteristics of 4H- and 3C-SiC surfaces can be optimised. The structure of this Hetero-Oxide starts with an Oxynitrid layer (2nm) in which nitrogen in low concentration passivates interface states. Praseodymium Oxide is reactive at the interface forming the silicate phase.The dielectric characteristics of Hetero-Oxides are defined mainly by the Dielectric Constants of the Rare-Earth-Oxide.
A spectroscopic method of non-destructive interface analyses is used for investigating and adjusting the atomic composition of the heterogeneous interfaces (<3nm). In this method a variable excitation energy of a beam line at BESSY is used. Electrical characteristics are only checked on MOSiC-Diodes.

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. D. Schmeißer

Duration:
10 / 2003 - 09 / 2005
10 / 2005 - 09 / 2007
10 / 2007 - 09 / 2008

Index of advancement:
SCHM 745/9-1
SCHM 745/9-2
SCHM 745/9-3

Promotional institution:
Deutsche Forschungsgemeinschaft
(DFG-Schwerpunktprogramm  1157 - Integrated Electroceramic Functional Structures)

Keywords:
power devices, sensors, interface states in SiC spectroscopy at hidden interfaces, XPS, AFM

Functional materials for nano electronics - PrOSiC (MWFK)

Functional materials for nano electronics - Praseodymium oxide as dielectric on silicon and silicon carbide

Brief description:
Dielectrics play a key role in semiconductor technology. In the first place they are used to realize insulating layers, and second they are forming the dielectric in capacitor structures. In this application it is wishful to have a possibly high dielectric constant due to the fact, that this allows a constant capacity in a smaller area of the capacitor structures in the course of the progressing miniaturization. This is an imperatively necessary strategy for the future as losses of capacity at miniaturization can not be adjusted by thinner SiO2-films. A film-thickness of 2 nm shows a physical limit (tunnel currents). Praseodymium oxide (Pr2O3) is seen as a promising candidate to replace the, up to now, predominant SiO2. With its comparatively high dielectric constant of 40 this means an improvement of the factor ten compared with SiO2 (ε =3.9) . These facts speak for Pr2O3 as the replacement dielectric on silicon.
However some fields exist, in which the semiconductor itself ( in this case silicon) has to be replaced by a more suitable material. A development of topical interest is to use SiC as replacement for Si. This is especially the case in the field of power electronic and sensors (and particularly for high temperatures).
Electrical properties (for instance density of interface states and dielectric constant) as well as chemical properties (for example stability at high temperatures and avoidance of silicide formation) of the dielectrics in interaction with the substrate (Si, SiC) have to be optimized. This requires a fundamental investigation of materials with suitable methods for it.
In this context the distinguished surface analytic method of photo electron spectroscopy (PES) with synchroton radiation finds its mission. This method is provided by the Chair of Applied Physics II at BTU Cottbus through its own Beamline at BESSY-II in Berlin/Adlershof in cooperation with BESSY. With this method a deep chemical image of ultra thin layers (<10nm) is possible aided by variably X-ray excitation energies.

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. D. Schmeißer

Duration:
2004 - 2006

Promotional institution:
HWP Forschungsprojektförderung (MWFK)

Keywords:
power devices, sensors, interface states in SiC spectroscopy at hidden interfaces, XPS, AFM

Investigations of ultra-thin Pr2O3 films on Si(111) by XSW/XPS measurements

Investigations of ultra-thin Pr2O3 films on Si(111) by XSW/XPS measurements

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. D. Schmeißer

Duration:
second half of 2005

Promotional institution:
ESRF (The European Synchrotron Radiation Facility)

Organic memories (DFG, SPP 1157, SCHM 745/11)

Organic ferroelectric layers for non volatile memories

Brief description:
In this project we will investigate organic ferroelectric layers for non volatile memories like in MFIS (metal - ferroelectric- insulator - semicoductor) structrues. We will characterise the interface properties between a functional organic layer and the surface of a dielectric layer. This will be done in the system P(VDF/TrFE) / SiO2 but also the use of Pr2O3 as a substitute of SiO2 will be analysed. The basic questions in respect to an ideal interface between two insulators are:

  • chemical stability (reaction products, oxygen diffusion),
  • pontential distribution (distribution along the interface, space-charge regions, abrupt interfaces, band edges perpendicular to the interface), and
  • chemical arrangement in the functional layer or disturbance of this arrangement by the interface

In the focus of nonvolatile memory element we will investigate:

  • ferroelectrical hysteresis
  • response time
  • data retention

We will also check the transferability of the results to other polymer insulator interfaces as well as the application of high-k buffer layers in anoranic ferroelectric structrures.

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. D. Schmeißer

Duration:
10 / 2005 - 09 / 2007
10 / 2007 - 05 / 2009

Index of advancement:
SCHM 745/11-1
SCHM 745/11-2

Promotional institution:
Deutsche Forschungsgemeinschaft
(DFG-Priority Program  1157 - Integrated Electroceramic Functional Structures)

Keywords:
non volatile memory, P(VDF/TrFE), FeFET

Organic field effect transistor (DFG, SPP 1121, SCHM 745/8)

Spectroscopic and microscopic characterisation of interfaces in organic field effect transistor layer structures: roughness, reactivity and potential variation

PEEM and Kelvin-AFM investigations on dielectric layers for organic field effect transistors

Brief description:
First there is a methodical development of spectroscopic characterisation of interfaces in organic field effect transistor layer structures. In focus of interest are the influences of roughness and reactivity. After finishing the characterisation a comparison with well-defined samples between two methods follows. Both methods enable a visualisation of potential gradients within the channel between source- and drain-electrodes. For this Micro-Kelvin and PEEM are used.
AFM and PES are used for characterising interfaces in OFET layer structures. Roughness on the interface between semiconductor and dielectrics as a result of production parameters is checked. Noticed roughness is correlated with these production parameters. The aim is to get the surfaces as smooth as possible and to determine and optimise the influence of interface roughness on electric characteristics of construction elements. Another aim is to learn, to what extent roughness and reactivity are a limit to characteristic electrical data of all-polymer elements. Here it must be figured out whether given steps in the fabrication process are limiting the performance.
PES will be used for controlling the chemical stability at the interfaces. By varying the depth sensitivity analysises can be done on hidden interfaces, as long as thicknesses of isolation layers are thinner than 2 nm.
After a successful optimisation of materials and preparation conditions potential distribution between source- and drain-electrode above source-drain-channel can be imaged with Micro-Kelvin and PEEM.

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Duration:
04/2003 - 03/2005
06/2005 - 05/2007

Index of advancement:
SCHM 745/8-1
SCHM 745/8-2

Promotional institution:
Deutsche Forschungsgemeinschaft
(DFG-Priority programme 1121 - Organische Feldeffekt-Transistoren: strukturelle und dynamische Eigenschaften)

Keywords:
XPS, AFM,PEEM potential distributions

Multi-spectral cell with ZnS-CuInS2 alloys (DFG, SCHM 745/3)

Multi-spectral cell with ZnS-CuInS2 alloys

Brief description:
The morphology, geometrical and electronical structure of in-situ prepared layers of Cu-In-S, influenced by annealing and evaporation of copper, indium and zinc sulphide is investigated. The exploration of these reaction processes is necessary for gaining information about the preparation conditions for homogenous and stochiometric layers of CuInS2 and mixed crystals of ZnS-CuInS2 with a controlled band gap. For investigating this, spectroscopic and micro spectroscopic methods are used.

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Index of advancement:
SCHM 745/3-1

Promotional institution:
Deutsche Forschungsgemeinschaft (DFG)

Defect states in WO3

Defect states in WO3

Aerosole 2 (BMWi, AiF, KF 0342201KFK1)

Detection of aerosols by quartz microbalances and their dynamic response characteristic (AiF, Aerosole 2)

Brief description:
New medical findings show hygienic effects of particles in the air to human being. So the prescriptive limits of such particles have been reduced by several laws. In the conjunction with these facts there is a need for low cost measurement systems for such particles (aerosol, dust).
In this project we will investigate the detection of particles with diameters smaller than 10µm with the method of quartz microbalances (QMB). Compared to the conventional method of the QMB (mass detection by frequency measurement), here we want to use network analysis to measure also at higher harmonics and to determine the damping of the measuring crystal system. In this way we like to get even more information about the dynamics of the processes and to use them for data analysis. Hereby we focus on contact phenomena as well as on the influence of physical properties of aerosol (viscosity, dew point) and of the measurement conditions (temperature, flux). We want to use the results of these investigations to distinguish different aerosols (constitution, properties).

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Cooperation partners:
Institut für Luft- und Kältetechnik gGmbH
Bertolt-Brecht-Allee 20,  01309 Dresden

Fanalmatic Gesellschaft für Umwelttechnik und Industrieautomation mbH
Köthener Straße 1a
06369 Weisandt-Gölzau

Duration:
05/2002-10/03

Index of advancement:
AiF KF 0342201KFK1

Promotional institution:
Bundesministerium für Wirtschaft und Technologie (BMWi / AiF)

Keywords:
quartz micobalance, aerosol

Aerosols 1 (BMWi, AiF, 15008 BR)

Detection of Particles and Drops in μm-range (AiF, Aerosols 1)

Brief description:
The scope of this work is to develop a method for measuring particles and liquid drops in the range smaller than 10 µm using quartz micro balances. This measurement should cover the range of low dust concentrations to detection of single particles.
Developing this measurement is a reaction on the current situation resulting from new laws and knowledge about pathogenic effect of dust particles.
Until now there is no measurement which is cheap enough for further controls and tests.

The most important aims for this project are:

  • Developing a measurement method for dust and particles in range smaller than 10 µm, based on quartz micro balances. This allows quasi-gravimetric and real-time measurements because this method is based on resonance-frequency shifts caused by the mass of particles segregated on the oscillating quartz.
  • Widening the detection of particles by quartz micro balances to drops and developing the measurement for proving evaporation of separated drops or hygroscopicity of separated particles.
  • Realising a modular functional model for the new measurement and proving the function compared to other measure possibilities.

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Cooperation partners:
Institut für Luft- und Kältetechnik gGmbH
Bertolt-Brecht-Allee 20
01309 Dresden

Duration:
11/2006-01/09

Index of advancement:
15008 BR

Promotional institution:
Bundesministerium für Wirtschaft und Technologie (BMWi / AiF)

Keywords:
quartz micobalance, aerosol, network analysis

Strain gauge (BMBF, 03N5020 9)

Strain gauge based on polymer foils

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Erich - Weinert - Straße 1
03046 Cottbus

Project manager:
Prof. Dr.  D. Schmeißer

Cooperation partners:
Fraunhofer-Institut für Angewandte Polymerforschung
Kantstraße 55
14513 Teltow

Thyssen Umformtechnik Leichtbau Entwicklungs GmbH
August-Thyssen-Straße
14974 Ludwigsfelde

Duration:
10 / 98 - 09 / 2000

Index of advancement:  
03N5020 9

Promotional institution:
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF)

Keywords:
strain gauge

Sensor materials (BMBF)

Sensor materials and sensors for specific detection of sulphurous and nitrogenous substance groups

Brief description
A sensor should be developed which allows the cheap detections of sulphur and nitrogen containing chemical compounds. A new type of sensors for analysing gas mixtures are mass sensitive quartz micro balances. Analytical gases can be proved by gas adsorption on the sensors polymer surface. This adsorption leads to a mass increasing of polymer film which causes a changing of resonance frequency. For selective defining of sulphurous and nitrogenous gas molecules chemical resistant polymers have to be found and optimised according to demands. This new sensors can be used for proving sulphurous and nitrogenous gaseous substances at low temperatures (20 ° - 100 ° C). Among developing long termed solid polymer layers, sensor relevant dates like sensitivity to the gases, signal stability, drift and respond behaviour have to be characterised and optimised.

Project manager:
Dr. Födisch

Project partner:
Dr. Födisch Umwelttechnik GmbH

Duration:
02/99 - 12/2000

Promotional institution:
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF)

Keywords:
sensor materials

Sensor arrays (BMBF)

Sensorarrays for specific detection of environmental and animal physiological relevant components

Brief description
Selective sensors for gas determination should be combined for measuring concentration and composition of gas mixtures. One of the target groups for this project is agricultural intensive breeding. In stables there are a lot of problems with optimising air quality because of raising and fattening conditions used at present. Air in stables enriches with ammonia, carbon dioxide, carbon monoxide, nitrous oxide, methane gas and hydrogen sulphide. Because of cheap analysis of air in stables the pollutant concentrations of ammonia, carbon dioxide and hydrogen sulphide demanded by laws can be supervised and controlled by ventilation. Furthermore odour emissions and concentrations of pollutants have to be considered. Developing a neuronal net ("intelligent net") which connects environmental and animalphysiological relevant components like atmospheric humidity, nitrous oxide, ammonia, amines, hydrogen sulphide, mercaptanes, methane gas, carbon monoxide, carbon dioxide and oxygen quantitative states about concentration and kind of gas in the mixture can be given. Necessary for this system are mass sensitive, selective quartz micro balances based on specially coated polymers.

Project manager:
Dr. Födisch

Project partner:
Dr. Födisch Umwelttechnik GmbH

Duration:
02/99 - 12/2000

Promotional institution:
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF)

Keywords:
sensor array

SekoSub-Polymelek (BMBF)

Sensors with micro structered polymeric electrodes - Polymelek

Brief description (final report)
The aim of this work was the use of polymer coated quartz microbalances for monitoring of hydrocarbon concentrations in textile cleaning machines and at working places around such machines.
We report about the setup and the mode of operation of a prototype of a workroom sensor. The best results as hydrocarbon sensitive layer on conventional quartzes (silver or gold electrodes) shows poly[tetradecylmethylsiloxane] (PTDMS). The PTDMS deposited quartz behave nearly linear in a range of 10 up to 1200 ppm with high sensitivity and short time constant (some seconds). So such a system is able to response quickly to oversteps of the maximum concentration of the workplaces (MAK). The sensitivity and stability increase while reducing the temperature up to room temperature. Humidity, type and flux of the carrier gas have only small influences.
The properties of the conducting polymer polypyrrole and its modifications are extensive discussed.
We present attempts to realise polymeric electrodes with this material and results of quartz microbalances having polypyrrole electrodes prepared by electropolymerisation. They showed resonance frequencies around 10 MHz, which fluctuated only 4 hertz in 57 hours and were sensitive against hydrocarbons and humidity but specially against nitrogen dioxide and the gas flux.
So we demonstrate for the first time the facility to use polypyrrole in the same time as the electrode material

Executor:
Lehrstuhl Angewandte Physik II - Sensorik
Brandenburgische Technische Universität Cottbus
Postfach 101344
03013 Cottbus

Project manager:
Prof. Dr. Dieter Schmeißer

Project partners:
Institut für Physikalische und Theoretische Chemie der Universität Tübingen
Bekleidungsphysiologisches Institut Hohenstein
Institut für Angewandte Physik der Technischen Universität Dresden
Fa. Böwe-Passat in Augsburg
Fa. Geosys in Leipzig
Fa. Dr. Födisch Umweltmeßtechnik GmbH in Kulkwitz

Duration:
10/96 - 09/99

Promotional institution:
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF)

Keywords:
Polymelek

magnesium alloys (BMBF)

Forming technolgy of rolling products of magnesium alloys

Project manager:
Prof. Dr. D. Schmeißer

Project partners:
TU Bergakademie Freiberg
BTU Cottbus, LS Konstruktion und Fertigung I
BTU Cottbus, LS Allgemeine Werkstofftechnik
TULE GmbH, Ludwigsfelde
Volkswagen AG, Wolfsburg

Duration:
10 / 98 - 03 / 2000

Promotional institution:
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF)

Keywords:
magnesium alloys

Steel & Al (BMBF)

Magnesium alloysForming assembling technolgies for bonding of aluminum and steel Steel & Al

Project manager:
Dr.-Ing. Jörg Rauer

Project partners:
BTU Cottbus, LS Konstruktion und Fertigung I
BTU Cottbus, LS Allgemeine Werkstofftechnik
TULE GmbH, Ludwigsfelde

Duration:
10 / 98 - 09 / 2001

Promotional institution:
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF)

Keywords:
aluminium, steel

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