Refine
Year of publication
Document Type
- Article (17)
- Conference Proceeding (3)
Keywords
- (Bio)degradation (1)
- Capacitive field-effect sensor (1)
- C–V method (1)
- Field-effect sensor (1)
- Gold nanoparticles (1)
- Impedance spectroscopy (1)
- Label-free detection (1)
- Multicell (1)
- Multiplexing (1)
- Poly(d,l-lacticacid) (1)
- Real-time monitoring (1)
- aminooctanethiol (1)
- capacitive model (1)
- electrolyte-insulator-semiconductor capacitors (1)
- field-effect sensor (1)
- gold nanoparticles (1)
- nanoparticle coverage (1)
Sensing charged macromolecules with nanocrystalline diamond-based field-effect capacitive sensors
(2008)
One-chip integrated dual amperometric/field-effect sensor for the detection of dissolved hydrogen
(2011)
Real-time and reliable monitoring of the biogas process is crucial for a stable and efficient operation of biogas production in order to avoid digester breakdowns. The concentration of dissolved hydrogen (H₂) represents one of the key parameters for biogas process control. In this work, a one-chip integrated combined amperometric/field-effect sensor for monitoring the dissolved H₂ concentration has been developed for biogas applications. The combination of two different transducer principles might allow a more accurate and reliable measurement of dissolved H₂ as an early warning indicator of digester failures. The feasibility of the approach has been demonstrated by simultaneous amperometric/field-effect measurements of dissolved H₂ concentrations in electrolyte solutions. Both, the amperometric and the field-effect transducer show a linear response behaviour in the H₂ concentration range from 0.1 to 3% (v/v) with a slope of 198.4 ± 13.7 nA/% (v/v) and 14.9 ± 0.5 mV/% (v/v), respectively.