Biosensoren auf der Basis von Halbleiter-Feldeffektstrukturen mit angekoppelten Insektenantennen
Biosensoren auf der Basis von Halbleiter-Feldeffektstrukturen mit angekoppelten Insektenantennen
The main goal of this work was the realization of a biosensor for the detection of smallconcentrations of organic odor substances by means of coupling an insect antenna to a fieldeffecttransistor. A sensor concept based on a BioFET (biologically sensitive field-effect transistor) was developed, wher...
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Personal Name(s): | Schroth, Peter (Corresponding author) |
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Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
2000
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Physical Description: |
IV, 91 p. |
Document Type: |
Report Book |
Research Program: |
Addenda |
Series Title: |
Berichte des Forschungszentrums Jülich
3837 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
The main goal of this work was the realization of a biosensor for the detection of smallconcentrations of organic odor substances by means of coupling an insect antenna to a fieldeffecttransistor. A sensor concept based on a BioFET (biologically sensitive field-effect transistor) was developed, where an insect antenna is coupled to the FET gate by means of anelectrolyte solution (bioelectronic interface). The electric potential generated in the antennaupon detecting a certain odor are measured by the FET. The FETs were fabricated bymeans of silicon planar technology and characterized with respect to their electrical properties. Meander-shaped gates were found to be most suitable for signal transduction. The insectantennae were electrically characterized by means of impedance spectroscopy. It could beshown that the impedance varies with the odor concentration as well as the bias voltage andthe age of the antenna. The odor detection measurements themselves were performed withdifferent insect species (potato beetle, steelblue jewel beetle, spodoptera littoralis, diabroticaundecimpunctata) as well as odor substances (cis-3-hexen-1-ol, guaiacol, 1-octen). Dependingon the insect species, odor concentrations could be reproducably detected down to the lowppt-range. In measurements in a glasshouse under real-world conditions, the suitability of thesensor for the detection of plant damages in agriculture could be demonstrated. |