Refine
Year of publication
- 2006 (34) (remove)
Document Type
- Conference Proceeding (34) (remove)
Keywords
- Biosensor (23)
- Bauingenieurwesen (2)
- CAD (2)
- biosensor (2)
- civil engineering (2)
- 3-nitrofluoranthene (1)
- BTEX compounds (1)
- Biosensorik (1)
- Bruchmechanik (1)
- CO (1)
- Conducing polymer (1)
- ECT (1)
- EPN (1)
- Fluorescence (1)
- GaAs hot electron injector (1)
- Gas sensor (1)
- Gunn diode (1)
- Heavy metal detection (1)
- High throughput experimentation (1)
- Hotplate (1)
- Hydrogen sensor (1)
- I3S 2005 (1)
- ISFET (1)
- International Symposium on Sensor Science (1)
- LED chip (1)
- Level sensor (1)
- Main sensitivity (1)
- Microreactors (1)
- Nanoparticles (1)
- Nanostructuring (1)
- Organophosphorus (1)
- Ostazine Orange (1)
- PFM (1)
- Phenylalanine determination (1)
- Potentiometry (1)
- Pseudomonas putida (1)
- Quartz crystal nanobalance (QCN) (1)
- Quartz micro balances (1)
- Reaction-diffusion (1)
- Solid amalgam electrodes (1)
- Tin oxide (1)
- Wafer (1)
- ammonia gas sensors (1)
- amperometric sensor (1)
- antimony doped tin oxide (1)
- capillary micro-droplet cell (1)
- carcinogens (1)
- catalytic decomposition (1)
- chemical reduction method (1)
- cross sensitivity (1)
- doped metal oxide (1)
- doped silicon (1)
- doping (1)
- electrical capacitance tomography (1)
- electro-migration (1)
- electronic noses dendronized polymers inverted mesa technology (1)
- enzymatic methods (1)
- enzyme immobilisation (1)
- fenitrothion (1)
- fluidic (1)
- gas sensor (1)
- gas sensor array (1)
- heater metallisation (1)
- high-temperature stability (1)
- humidity (1)
- hydrogen peroxide (1)
- image sensor (1)
- imaging (1)
- impedance spectroscopy (1)
- ion-selective electrodes (1)
- lab-on-a-chip (1)
- lab-on-chip (1)
- layer expansion (1)
- lenslet array (1)
- magnetic particles (1)
- matrix method (1)
- metal oxide (1)
- microreactor (1)
- microwave generation (1)
- modeling biosensor (1)
- modelling (1)
- modified electrode (1)
- multi-interface measurement (1)
- nitrogen oxides (1)
- organic PVC membranes (1)
- pH-based biosensing (1)
- pattern-size reduction (1)
- polymer composites (1)
- porous Pt electrode (1)
- principal component (1)
- probabilistic fracture mechanics (1)
- quantum charging (1)
- screen-printing (1)
- self-aligned patterning (1)
- sensing properties (1)
- sterilisation (1)
- surface modification (1)
- swift heavy ions (1)
- thick-film technology (1)
- thin-film microsensors (1)
- voltammetry (1)
- wafer-level testing (1)
Institute
- Fachbereich Medizintechnik und Technomathematik (34) (remove)
Study of swift heavy ion modified conduction polymer composites for application as gas sensor
(2006)
A polyaniline-based conducting composite was prepared by oxidative polymerisation of aniline in a polyvinylchloride (PVC) matrix. The coherent free standing thin films of the composite were prepared by a solution casting method. The polyvinyl chloride-polyaniline composites exposed to 120 MeV ions of silicon with total ion fluence ranging from 1011 to 1013 ions/cm2, were observed to be more sensitive towards ammonia gas than the unirradiated composite. The response time of the irradiated composites was observed to be comparably shorter. We report for the first time the application of swift heavy ion modified insulating polymer conducting polymer (IPCP) composites for sensing of ammonia gas.
In this paper, methods of surface modification of different supports, i.e. glass and polymeric beads for enzyme immobilisation are described. The developed method of enzyme immobilisation is based on Schiff’s base formation between the amino groups on the enzyme surface and the aldehyde groups on the chemically modified surface of the supports. The surface of silicon modified by APTS and GOPS with immobilised enzyme was characterised by atomic force microscopy (AFM), time-of-flight secondary ion mass spectroscopy (ToF-SIMS) and infrared spectroscopy (FTIR). The supports with immobilised enzyme (urease) were also tested in combination with microreactors fabricated in silicon and Perspex, operating in a flow-through system. For microreactors filled with urease immobilised on glass beads (Sigma) and on polymeric beads (PAN), a very high and stable signal (pH change) was obtained. The developed method of urease immobilisation can be stated to be very effective.
The workflow of a high throughput screening setup for the rapid identification of new and improved sensor materials is presented. The polyol method was applied to prepare nanoparticular metal oxides as base materials, which were functionalised by surface doping. Using multi-electrode substrates and high throughput impedance spectroscopy (HT-IS) a wide range of materials could be screened in a short time. Applying HT-IS in search of new selective gas sensing materials a NO2-tolerant NO sensing material with reduced sensitivities towards other test gases was identified based on iridium doped zinc oxide. Analogous behaviour was observed for iridium doped indium oxide.