Communication Dans Un Congrès Année : 2018

Electrical detection of bacteria on SOI film using the pseudo-MOSFET configuration

Résumé

Fast detection of bacteria is crucial in several domains such as health care, food industry and for environmental applications. Classical methods suffer from some drawbacks. For instance, traditional culture is very time consuming and PCR (polymerase chain reaction) is very expensive. For these reasons, electrical detection may be a good alternative. In our work, a Pseudo-MOSFET device realized on a SOI (Silicon on insulator) wafer was used in order to detect bacteria. To reach this goal, comparisons between transistors characteristics with and without bacteria were analyzed. E.Coli K12 strains were grown in medium (pH7) at 30°C the day before. The bacterial suspensions with a final concentration of 10 8 cells/mL were prepared in lysogeny broth (LB) medium which was then removed and replaced by distilled water in order to avoid the presence of ions from the medium. Then a drop of 5µL of this solution was put on SOI wafer. After drying, measurements were performed. A characteristic shift of the ID (VG) and the VB (VG) curves is observed thus, showing the presence of negative electric charges, on the top surface of the sensitive Pseudo-MOSFET. This negative charge could be related to the bacteria electric charges. Further experiments have to be performed to check the repeatability of the observed effect and try to enhance its magnitude.

Fichier non déposé

Dates et versions

hal-02016817 , version 1 (12-02-2019)

Identifiants

  • HAL Id : hal-02016817 , version 1

Citer

Médéric Vindret, Licinius Benea, Irina Ionica, Cécile Delacour, Pascal Xavier, et al.. Electrical detection of bacteria on SOI film using the pseudo-MOSFET configuration. International Workshop on Semi-conducting Nanomaterials for Health, Environment and Security Applications, Nanonets2Sense, Nov 2018, Grenoble, France. ⟨hal-02016817⟩
189 Consultations
0 Téléchargements

Partager

  • More