Refine
Year of publication
Document Type
- Article (542)
- Conference Proceeding (63)
- Part of a Book (11)
- Book (2)
- Other (2)
- Report (2)
- Patent (1)
Language
- English (551)
- German (71)
- Multiple languages (1)
Keywords
- Biosensor (7)
- Graduiertentagung (5)
- LAPS (4)
- field-effect sensor (4)
- hydrogen peroxide (4)
- Field-effect sensor (3)
- Label-free detection (3)
- Light-addressable potentiometric sensor (3)
- biosensors (3)
- capacitive field-effect sensor (3)
- tobacco mosaic virus (TMV) (3)
- Bacillus atrophaeus (2)
- Calorimetric gas sensor (2)
- Capacitive field-effect sensor (2)
- Graduate symposium (2)
- Hydrogen peroxide (2)
- Raman spectroscopy (2)
- Tobacco mosaic virus (TMV) (2)
- acetoin (2)
- capacitive field-effect sensors (2)
- gold nanoparticles (2)
- light-addressable potentiometric sensor (2)
- penicillinase (2)
- sterilisation (2)
- (Bio)degradation (1)
- Aachen / Fachhochschule Aachen (1)
- Aachen / Fachhochschule Aachen ; Graduierter ; Promotionsstudium (1)
- Bacillus atrophaeus spores (1)
- Bio-Sensors (1)
- Bioabsorbable (1)
- Biomolecular logic gate (1)
- Biophoton (1)
- Biosensorik (1)
- CNOT (1)
- Capacitive field-effect (1)
- Capacitive model (1)
- Chemical images (1)
- Chemical imaging (1)
- Chemical imaging sensor (1)
- Chemical sensor (1)
- Coat protein (1)
- C–V method (1)
- DNA (1)
- DNA biosensor (1)
- DNA hybridization (1)
- DPA (dipicolinic acid) (1)
- Dehydrogenase (1)
- Diaphorase (1)
- EIS capacitive sensor (1)
- Electrolyte–insulator–semiconductor (1)
- Enzymatic biosensor (1)
- Enzyme biosensor (1)
- Enzyme coverage (1)
- Enzyme logic gate (1)
- Enzyme nanocarrier (1)
- Field effect (1)
- Field-effect biosensor (1)
- Field-effect device (1)
- Gas sensor (1)
- Glucose biosensor (1)
- Glucose oxidase (1)
- Gold nanoparticle (1)
- Gold nanoparticles (1)
- Graduierter (1)
- Heavy metal detection (1)
- I3S 2005 (1)
- ISFET (1)
- Impedance spectroscopy (1)
- International Symposium on Sensor Science (1)
- Layer-by-layer adsorption (1)
- LbL films (1)
- Light-addressable Potentiometric Sensor (1)
- MEMS (1)
- MOS (1)
- Multi-sensor system (1)
- Multianalyte detection (1)
- Multicell (1)
- Multiplexing (1)
- Nano Materials (1)
- Nanomaterial (1)
- Nanopartikel (1)
- Nanostructuring (1)
- Nanotechnologie (1)
- Nanotechnology ; Microelectronics ; Biosensors ; Superconductor ; MEMS (1)
- Negative impedance convertor (1)
- O2 plasma (1)
- Organic light-emitting diode display (1)
- Penicillin (1)
- Plant virus (1)
- Poly(allylamine hydrochloride) (1)
- Poly(d,l-lacticacid) (1)
- Polyimide (1)
- Polylactide acid (1)
- Potentiometry (1)
- Promotionsstudium (1)
- Real-time monitoring (1)
- Resistive temperature detector (1)
- Resonance-mode measurement (1)
- Silk fibroin (1)
- Simultaneous determination (1)
- Sn₃O₄ (1)
- Sterilisation process (1)
- Supraleiter (1)
- TMV adsorption (1)
- Ta₂O₅ gate (1)
- Tobacco mosaic virus (1)
- Wafer (1)
- XOR (1)
- Zeta potential (1)
- acetoin reductase (1)
- actuator-sensor system (1)
- alcoholic beverages (1)
- aminooctanethiol (1)
- amperometric biosensors (1)
- annealing (1)
- artificial olfactory image (1)
- aseptic parameters (1)
- atomic layer deposition (1)
- barium strontium titanate (1)
- bi-enzyme biosensor (1)
- bioburdens (1)
- biocompatible (1)
- biocompatible materials (1)
- biodegradabl (1)
- biodegradable electronic devices (1)
- biosensor (1)
- calorimetric gas sensor (1)
- calorimetric gas sensor;hydrogen peroxide;wireless sensor system (1)
- capacitive EIS sensor (1)
- capacitive electrolyte–insulator–semiconductor sensors (1)
- capacitive field-effect biosensor (1)
- capacitive model (1)
- capillary micro-droplet cell (1)
- carbon electrodes (1)
- catalytic decomposition (1)
- catalytic metal (1)
- chemical sensor (1)
- contactless conductivity sensor (1)
- control gate (1)
- detection of charged macromolecules (1)
- electrolyte-insulator semiconductor sensor (EIS) (1)
- electrolyte-insulator-semiconductor capacitors (1)
- electronic nose (1)
- encapsulation materials (1)
- endospores (1)
- enzymatic (bio)degradation (1)
- enzymatic biosensor (1)
- enzyme cascade (1)
- enzyme immobilization (1)
- enzyme kinetics (1)
- enzyme-logic gate (1)
- equivalent circuit (1)
- fibroin (1)
- field-effect structure (1)
- gas sensor (1)
- gaseous hydrogen peroxide (1)
- glucose (1)
- glucose oxidase (GOx) (1)
- graphene oxide (1)
- heavy metals (1)
- high-k material (1)
- horseradish peroxidase (HRP) (1)
- hydroxylation (1)
- immobilization (1)
- impedance spectroscopy (1)
- in-situ monitoring (1)
- lable-free detection (1)
- layer expansion (1)
- layer-by-layer technique (1)
- light-addressable electrode (1)
- light-addressing technologies (1)
- metal-oxide-semiconductor structure (1)
- microfluidics (1)
- multi-functional material (1)
- multi-sensing platform (1)
- multianalyte detection (1)
- nanobelts (1)
- nanomaterials (1)
- nanoparticle coverage (1)
- novel photoexcitation method (1)
- on-chip integrated addressable EISCAP sensors (1)
- optical sensor setup (1)
- optical spore trapping (1)
- optical trapping (1)
- organic PVC membranes (1)
- organosilanes (1)
- pH sensors (1)
- pattern-size reduction (1)
- penicillin (1)
- photoelectrochemistry (1)
- plant virus detection (1)
- plug-based microfluidic device (1)
- poly(d, l-lactic acid) (1)
- polyaniline (1)
- polystyrene sulfonate (1)
- scanned light pulse technique (1)
- self-aligned patterning (1)
- silanization (1)
- spatial resolution (1)
- spore kill rate (1)
- sterility (1)
- sterility tests (1)
- sterilization (1)
- sterilization conditions (1)
- sterilization efficacy (1)
- sterilization methods (1)
- surface functionalization (1)
- temperature (1)
- thin-film microsensors (1)
- tilted constant illumination (1)
- titanium dioxide photoanode (1)
- turnip vein clearing virus (TVCV) (1)
- ultrathin gate insulators (1)
- urease (1)
- validation methods (1)
- visualization (1)
- wafer-level testing (1)
Institute
- Fachbereich Medizintechnik und Technomathematik (603)
- INB - Institut für Nano- und Biotechnologien (526)
- Fachbereich Chemie und Biotechnologie (40)
- FH Aachen (5)
- Nowum-Energy (5)
- Fachbereich Energietechnik (4)
- Institut fuer Angewandte Polymerchemie (3)
- Arbeitsstelle fuer Hochschuldidaktik und Studienberatung (1)
- Fachbereich Elektrotechnik und Informationstechnik (1)
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.
In this study, a high-speed chemical imaging system was developed for visualization of the interior of a microfluidic channel. A microfluidic channel was constructed on the sensor surface of the light-addressable potentiometric sensor (LAPS), on which the ion concentrations could be measured in parallel at up to 64 points illuminated by optical fibers. The temporal change of pH distribution inside the microfluidic channel was recorded at a maximum rate of 100 frames per second (fps). The high frame rate allowed visualization of moving interfaces and plugs in the channel even at a flow velocity of 111 mm/s, which suggests the feasibility of plug-based microfluidic devices for flow-injection analysis (FIA).
Light-addressable potentiometric sensors (LAPS) are field-effect-based sensors. A modulated light source is used to define the particular measurement spot to perform spatially resolved measurements of chemical species and to generate chemical images. In this work, an organic-LED (OLED) display has been chosen as a light source. This allows high measurement resolution and miniaturisation of the system. A new developed driving method for the OLED display optimised for LAPS-based measurements is demonstrated. The new method enables to define modulation frequencies between 1 kHz and 16 kHz and hence, reduces the measurement time of a chemical image by a factor of 40 compared to the traditional addressing of an OLED display.
Heavy metal detection with semiconductor devices based on PLD-prepared chalcogenide glass thin films
(2007)
In this article, we report on the heat-transfer resistance at interfaces as a novel, denaturation-based method to detect single-nucleotide polymorphisms in DNA. We observed that a molecular brush of double-stranded DNA grafted onto synthetic diamond surfaces does not notably affect the heat-transfer resistance at the solid-to-liquid interface. In contrast to this, molecular brushes of single-stranded DNA cause, surprisingly, a substantially higher heat-transfer resistance and behave like a thermally insulating layer. This effect can be utilized to identify ds-DNA melting temperatures via the switching from low- to high heat-transfer resistance. The melting temperatures identified with this method for different DNA duplexes (29 base pairs without and with built-in mutations) correlate nicely with data calculated by modeling. The method is fast, label-free (without the need for fluorescent or radioactive markers), allows for repetitive measurements, and can also be extended toward array formats. Reference measurements by confocal fluorescence microscopy and impedance spectroscopy confirm that the switching of heat-transfer resistance upon denaturation is indeed related to the thermal on-chip denaturation of DNA.