Refine
Year of publication
Document Type
- Article (530)
- Conference Proceeding (56)
- Part of a Book (10)
- Book (2)
- Other (2)
- Report (2)
- Patent (1)
Keywords
- Biosensor (7)
- LAPS (4)
- hydrogen peroxide (4)
- Field-effect sensor (3)
- Label-free detection (3)
- Light-addressable potentiometric sensor (3)
- biosensors (3)
- Bacillus atrophaeus (2)
- Capacitive field-effect sensor (2)
- Raman spectroscopy (2)
- Tobacco mosaic virus (TMV) (2)
- acetoin (2)
- capacitive field-effect sensors (2)
- field-effect sensor (2)
- sterilisation (2)
- tobacco mosaic virus (TMV) (2)
- (Bio)degradation (1)
- Bacillus atrophaeus spores (1)
- Bio-Sensors (1)
- Bioabsorbable (1)
Institute
- Fachbereich Medizintechnik und Technomathematik (603) (remove)
A capacitive electrolyte-insulator-semiconductor (EISCAP) biosensor modified with Tobacco mosaic virus (TMV) particles for the detection of acetoin is presented. The enzyme acetoin reductase (AR) was immobilized on the surface of the EISCAP using TMV particles as nanoscaffolds. The study focused on the optimization of the TMV-assisted AR immobilization on the Ta 2 O 5 -gate EISCAP surface. The TMV-assisted acetoin EISCAPs were electrochemically characterized by means of leakage-current, capacitance-voltage, and constant-capacitance measurements. The TMV-modified transducer surface was studied via scanning electron microscopy.
Detection of triacetone triperoxide using temperature cycled metal-oxide semiconductor gas sensors
(2015)
Chemical imaging systems allow the visualisation of the distribution of chemical species on the sensor surface. This work represents a new flexible approach to read out light-addressable potentiometric sensors (LAPS) with the help of a digital light processing (DLP) set-up. The DLP, known well for video projectors, consists of a mirror-array MEMS device, which allows fast and flexible generation of light patterns. With the help of these light patterns, the sensor surface of the LAPS device can be addressed. The DLP approach has several advantages compared to conventional LAPS set-ups, e.g., the spot size and the shape of the light pointer can be changed easily and no mechanical movement is necessary, which reduces the size of the set-up and increases the stability and speed of the measurement. In addition, the modulation frequency and intensity of the light beam are important parameters of the LAPS set-up. Within this work, the authors will discuss two different ways of light modulation by the DLP set-up, investigate the influence of different modulation frequencies and different light intensities as well as demonstrate the scanning capabilities of the new set-up by pH mapping on the sensor surface.