Refine
Year of publication
- 2013 (174) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (54)
- INB - Institut für Nano- und Biotechnologien (35)
- Fachbereich Elektrotechnik und Informationstechnik (29)
- Fachbereich Chemie und Biotechnologie (26)
- IfB - Institut für Bioengineering (24)
- Fachbereich Energietechnik (16)
- Fachbereich Luft- und Raumfahrttechnik (14)
- Fachbereich Wirtschaftswissenschaften (12)
- Fachbereich Bauingenieurwesen (9)
- Fachbereich Maschinenbau und Mechatronik (6)
Language
- English (174) (remove)
Document Type
- Article (97)
- Conference Proceeding (57)
- Part of a Book (7)
- Doctoral Thesis (4)
- Book (2)
- Other (2)
- Patent (2)
- Report (2)
- Conference: Meeting Abstract (1)
Keywords
- industrial research (2)
- metal structure (2)
- steel (2)
- Bacillus atrophaeus (1)
- Business Models (1)
- Epithel (1)
- Fibroblast (1)
- IT Products (1)
- Product Management (1)
- Strategic Business Planning (1)
Experimental investigation of selective laser melting of lunar regolith for in-situ applications
(2013)
Light-addressable potentiometric sensors (LAPS) are semiconductor-based potentiometric sensors, with the advantage to detect the concentration of a chemical species in a liquid solution above the sensor surface in a spatially resolved manner. The addressing is achieved by a modulated and focused light source illuminating the semiconductor and generating a concentration-depending photocurrent. This work introduces a LAPS set-up that is able to monitor the electrical impedance in addition to the photocurrent. The impedance spectra of a LAPS structure, with and without illumination, as well as the frequency behaviour of the LAPS measurement are investigated. The measurements are supported by electrical equivalent circuits to explain the impedance and the LAPS-frequency behaviour. The work investigates the influence of different parameters on the frequency behaviour of the LAPS. Furthermore, the phase shift of the photocurrent, the influence of the surface potential as well as the changes of the sensor impedance will be discussed.