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- Article (462) (remove)
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- LAPS (3)
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- capacitive field-effect sensor (3)
- field-effect sensor (3)
- tobacco mosaic virus (TMV) (3)
- Bacillus atrophaeus (2)
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- capacitive field-effect sensors (2)
- gold nanoparticles (2)
- hydrogen peroxide (2)
- light-addressable potentiometric sensor (2)
- penicillinase (2)
- (Bio)degradation (1)
- Bacillus atrophaeus spores (1)
- Bioabsorbable (1)
- CNOT (1)
- Calorimetric gas sensor (1)
- Capacitive field-effect (1)
- Capacitive model (1)
- Chemical images (1)
- Chemical imaging sensor (1)
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- DPA (dipicolinic acid) (1)
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- Layer-by-layer adsorption (1)
- LbL films (1)
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- Penicillin (1)
- Plant virus (1)
- Poly(allylamine hydrochloride) (1)
- Poly(d,l-lacticacid) (1)
- Polyimide (1)
- Polylactide acid (1)
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- Sn₃O₄ (1)
- Sterilisation process (1)
- TMV adsorption (1)
- Ta₂O₅ gate (1)
- Tobacco mosaic virus (TMV) (1)
- XOR (1)
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- acetoin (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)
- bi-enzyme biosensor (1)
- bioburdens (1)
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- biodegradable electronic devices (1)
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- calorimetric gas sensor (1)
- calorimetric gas sensor;hydrogen peroxide;wireless sensor system (1)
- capacitive EIS sensor (1)
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- capacitive model (1)
- carbon electrodes (1)
- catalytic metal (1)
- chemical 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 biosensor (1)
- enzyme cascade (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)
- horseradish peroxidase (HRP) (1)
- hydroxylation (1)
- immobilization (1)
- layer-by-layer technique (1)
- light-addressable electrode (1)
- light-addressing technologies (1)
- metal-oxide-semiconductor structure (1)
- microfluidics (1)
- multi-sensing platform (1)
- multianalyte detection (1)
- nanobelts (1)
- nanomaterials (1)
- nanoparticle coverage (1)
- on-chip integrated addressable EISCAP sensors (1)
- optical sensor setup (1)
- optical spore trapping (1)
- optical trapping (1)
- organosilanes (1)
- pH sensors (1)
- penicillin (1)
- photoelectrochemistry (1)
- plant virus detection (1)
- plug-based microfluidic device (1)
- polyaniline (1)
- polystyrene sulfonate (1)
- scanned light pulse technique (1)
- silanization (1)
- spore kill rate (1)
- sterilisation (1)
- sterility (1)
- sterility tests (1)
- sterilization (1)
- sterilization conditions (1)
- sterilization efficacy (1)
- sterilization methods (1)
- surface functionalization (1)
- temperature (1)
- titanium dioxide photoanode (1)
- turnip vein clearing virus (TVCV) (1)
- ultrathin gate insulators (1)
- urease (1)
- validation methods (1)
- visualization (1)
Institute
- INB - Institut für Nano- und Biotechnologien (462) (remove)
The artificial olfactory image was proposed by Lundström et al. in 1991 as a new strategy for an electronic nose system which generated a two-dimensional mapping to be interpreted as a fingerprint of the detected gas species. The potential distribution generated by the catalytic metals integrated into a semiconductor field-effect structure was read as a photocurrent signal generated by scanning light pulses. The impact of the proposed technology spread beyond gas sensing, inspiring the development of various imaging modalities based on the light addressing of field-effect structures to obtain spatial maps of pH distribution, ions, molecules, and impedance, and these modalities have been applied in both biological and non-biological systems. These light-addressing technologies have been further developed to realize the position control of a faradaic current on the electrode surface for localized electrochemical reactions and amperometric measurements, as well as the actuation of liquids in microfluidic devices.
Electrolyte-insulator-semiconductor capacitors (EISCAP) belong to field-effect sensors having an attractive transducer architecture for constructing various biochemical sensors. In this study, a capacitive model of enzyme-modified EISCAPs has been developed and the impact of the surface coverage of immobilized enzymes on its capacitance-voltage and constant-capacitance characteristics was studied theoretically and experimentally. The used multicell arrangement enables a multiplexed electrochemical characterization of up to sixteen EISCAPs. Different enzyme coverages have been achieved by means of parallel electrical connection of bare and enzyme-covered single EISCAPs in diverse combinations. As predicted by the model, with increasing the enzyme coverage, both the shift of capacitance-voltage curves and the amplitude of the constant-capacitance signal increase, resulting in an enhancement of analyte sensitivity of the EISCAP biosensor. In addition, the capability of the multicell arrangement with multi-enzyme covered EISCAPs for sequentially detecting multianalytes (penicillin and urea) utilizing the enzymes penicillinase and urease has been experimentally demonstrated and discussed.